The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
Lian-sheng Zang - One of the best experts on this subject based on the ideXlab platform.
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rearing trichogramma ostriniae on the factitious host antheraea pernyi via Multiparasitism with trichogramma chilonis facilitates enhanced biocontrol potential against ostrinia furnacalis
Biological Control, 2021Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Chang-chun Ruan, Muhammad Qayash Khan, Lian-sheng ZangAbstract:Abstract The Asian corn borer (ACB) Ostrinia furnacalis is a voracious pest of corn in Asia. The egg parasitoid Trichogramma ostriniae is an important biological control agent of ACB. The possibility of mass-producing T. ostriniae on the factitious host Chinese oak silkworm, Antheraea pernyi, via Multiparasitism with T. chilonis has been previously reported. Here, we evaluated the fitness parameters of A. pernyi-reared T. ostriniae via Multiparasitism and its potential to parasitize ACB eggs of different ages (12 h and 24 h) in comparison to T. ostriniae reared on eggs of rice moth, Corcyra cephalonica. The results showed that rearing host species affected body size, longevity and lifetime fecundity of T. ostriniae. The A. pernyi host produced T. ostriniae of larger body size (female: 641.8 µm, male: 556.1 µm) than C. cephalonica-reared T. ostriniae (female: 482.1 µm; male: 457.6 µm). Consequently, the A. pernyi-reared T.ostriniae females lived longer (14.1 d) and were more fecund (180.7) than were C. cephalonica-reared T. ostriniae females (longevity: 10.2 d; lifetime fecundity: 140.1). In addition, A. pernyi-reared T. ostriniae females parasitized greater numbers of target ACB eggs at different ages (12 h: 43.2; 24 h: 41.0) than did C. cephalonica-reared T. ostriniae (12 h: 35.2; 24 h: 31.4). These results demonstrated that the rearing host species impacted the performance of T. ostriniae in biological control of ACB and that the fitness of A. pernyi-reared T. ostriniae females was higher than that of C. cephalonica-reared T. ostriniae females, which should render them more effective biological control agents of ACB.
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Impact of Trichogramma parasitoid age on the outcome of Multiparasitism in the factitious host eggs of Chinese oak silkworm, Antheraea pernyi
Journal of Pest Science, 2020Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Asad Ali, Lucie S. Monticelli, Nicolas Desneux, Lian-sheng ZangAbstract:The age of Trichogramma parasitoids could influence biological traits which are of great importance for effectiveness of mass rearing systems. Recent studies demonstrated that Trichogramma ostriniae (TO) could parasitize Antheraea pernyi eggs through Multiparasitism along with other Trichogramma species, although few adults could emerge successfully. It is important to characterize the factors modulating the performance of TO on A. pernyi eggs, notably in order to try enhancing its quantitative emergence through Multiparasitism for further use in biological control. In this context, irrespective of host age, we tested different ages of TO females (from 0.5-day- to 6-day-old postemergence) in Multiparasitism with Trichogramma chilonis (TC) on A. pernyi eggs. The results of the present study confirmed that TO parasitism on A. pernyi eggs was largely age dependent. Higher percentage of Multiparasitism and higher number of emerged TO adults were recorded in the treatment where 3-day-old TO females were used for parasitization with TC on A. pernyi host. In addition, we also tested different female ratios of both Trichogramma species to find out an optimal ratio for use in mass production. The highest percentage of Multiparasitism, emergence and optimum emerged number of TO (per A. pernyi egg) was observed with the ratio 3:2 (TO:TC) per 1 host egg. This study demonstrated that the age of TO females can significantly affect their performance in Multiparasitism of large A. pernyi eggs. These results prompt for more research in order to develop an effective Multiparasitism-based production of TO at the industrial scale.
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Factitious host species impact on the outcome of Multiparasitism between egg parasitoids
Journal of Pest Science, 2019Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Lisheng Zhang, Lian-sheng ZangAbstract:Trichogramma parasitoids are biological control agents of a large number of lepidopterous pests. Mass production of these Trichogramma parasitoids is carried out on different factitious host eggs where the cost for mass rearing is high and the production efficiency is low. Therefore, efficient means and techniques for mass production of these parasitoids are needed. Host eggs of Chinese oak silkworm, Antheraea pernyi, not only proved effective for the mass production of a single Trichogramma species but also showed great potential for simultaneously producing two different Trichogramma species through Multiparasitism. Here, we evaluated the outcomes of Multiparasitism between Trichogramma chilonis and T. leucaniae reared on the eggs of two factitious hosts, Antheraea pernyi and Corcyra cephalonica. Our study indicated that parental wasps of both Trichogramma species reared on A. pernyi performed outstandingly in all aspects of Multiparasitism on A. pernyi eggs. In contrast, significantly low parasitism rates for parental wasps reared on C. cephalonica and subsequently low emergence rates for their offspring were recorded for Multiparasitism on A. pernyi eggs. Parental wasps reared on different host eggs significantly affected the emerged offspring numbers for both Trichogramma species per A. pernyi egg. Significantly high numbers of offspring for specific species of Trichogramma emerged per A. pernyi egg when the parental wasps of that species were reared on A. pernyi eggs compared to the other species reared on C. cephalonica eggs. The present study concluded that rearing host species had a great impact on the performance of parental wasps in the Multiparasitism of Trichogramma parasitoids on A. pernyi eggs and clearly confirmed that T. chilonis and T. leucaniae parasitoids can be massively produced on A. pernyi eggs through Multiparasitism. Our results provide useful information about rearing hosts, which could provide two different Trichogramma species in the field at a time for the suppression of pest populations.
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Multiparasitism with trichogramma dendrolimi on egg of Chinese oak silkworm, antheraea pernyi, enhances emergence of Trichogramma ostriniae
Journal of Pest Science, 2019Co-Authors: Chun-yu Tian, Yang-yang Hou, Lian-sheng Zang, Chang-chun Ruan, Xiangbing Yang, Lucie Monticelli, Nicolas DesneuxAbstract:Trichogramma parasitoids are important biological control agents for insect pest management. However, efficient means for mass production of Trichogramma parasitoids are needed, particularly for T. ostriniae, which often fail to form emergence holes on host eggs of Chinese oak silkworm, Antheraea pernyi, because of the hard chorion. In the present study, we evaluated the possibilities to enhance adult emergence of T. ostriniae by utilizing emergence holes made by T. dendrolimi during Multiparasitism on host eggs of A. pernyi and other biological parameters such as pre-emergence time, parasitism rate, and emergence rate of the two parasitoids, which were also evaluated between the two parasitism regimes of multi- and monoparasitism. Our data showed that Multiparasitism on host eggs of A. pernyi significantly facilitated the emergence of adult T. ostriniae. Generally, both Trichogramma species favored parasitizing A. pernyi eggs, with multiple parasitoid adults emerged per host egg. The overall performance of T. dendrolimi was similar between the two parasitism regimes, although a significantly higher number of unemerged adults were found in the multiparasitized eggs than in the monoparasitized. For T. ostriniae, significantly more adults emerged, and a higher emergence rate was recorded on host eggs multiparasitized with T. dendrolimi than that on monoparasitized. Furthermore, significantly fewer unemerged adults were found in multi- than monoparasitized host eggs. The results of this study provided useful information on the feasibility of mass production of T. ostriniae via Multiparasitism with T. dendrolimi on large eggs of A. pernyi.
Elise Vaumourin - One of the best experts on this subject based on the ideXlab platform.
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The importance of Multiparasitism: examining the consequences of co-infections for human and animal health.
Parasites & vectors, 2015Co-Authors: Elise Vaumourin, Gwenaël Vourc’h, Patrick Gasqui, Muriel Vayssier-taussatAbstract:Most parasites co-occur with other parasites, although the importance of such Multiparasitism has only recently been recognised. Co-infections may result when hosts are independently infected by different parasites at the same time or when interactions among parasite species facilitate co-occurrence. Such interactions can have important repercussions on human or animal health because they can alter host susceptibility, infection duration, transmission risks, and clinical symptoms. These interactions may be synergistic or antagonistic and thus produce diverse effects in infected humans and animals. Interactions among parasites strongly influence parasite dynamics and therefore play a major role in structuring parasite populations (both within and among hosts) as well as host populations. However, several methodological challenges remain when it comes to detecting parasite interactions. The goal of this review is to summarise current knowledge on the causes and consequences of Multiparasitism and to discuss the different methods and tools that researchers have developed to study the factors that lead to Multiparasitism. It also identifies new research directions to pursue.
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Modélisation statistique des associations et des interactions entre des parasites transmis par des vecteurs, à partir de données issues d'études transversales
2014Co-Authors: Elise VaumourinAbstract:Le Multiparasitisme et surtout les associations qui en découlent, ont une grande influence sur l’écologie des parasites concernés. Elle est d’autant plus grande que les parasites peuvent interagir et ainsi modifier leurs effets sur les hôtes. Cependant, l’identification des associations et interactions de parasites est complexe au niveau populationnel. Notre objectif était de modéliser les associations et les interactions multiparasitaires, notamment dans le cadre des parasites d’importance médicale, vétérinaire ou agronomique. Nous avons tout d’abord réalisé une revue bibliographique sur les différentes causes et conséquences du Multiparasitisme ainsi que sur les méthodes et outils disponibles pour comprendre les phénomènes qui le génèrent. Dans un second temps, nous nous sommes intéressés tout particulièrement à la détection des associations multiparasitaires. Nous avons développé une nouvelle méthode « de screening des associations » pour tester statistiquement la présence d’associations de parasites à une échelle globale. Nous avons utilisé cette méthode pour identifier les associations et pour révéler précisément les parasites associés au sein de diverses populations d’hôtes. Puis, nous avons étudié les interactions entre les parasites. Nous avons développé un modèle pour identifier les interactions entre deux parasites vectorisés et persistants chez un hôte, à partir de données issues d’études transversales. L’une des voies de progression de la connaissance sur les interactions est la prise en compte des facteurs de risque communs. La prise en compte des interactions contribue à améliorer le diagnostic, les traitements et la prévention des maladies infectieuses.
Nicolas Desneux - One of the best experts on this subject based on the ideXlab platform.
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rearing trichogramma ostriniae on the factitious host antheraea pernyi via Multiparasitism with trichogramma chilonis facilitates enhanced biocontrol potential against ostrinia furnacalis
Biological Control, 2021Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Chang-chun Ruan, Muhammad Qayash Khan, Lian-sheng ZangAbstract:Abstract The Asian corn borer (ACB) Ostrinia furnacalis is a voracious pest of corn in Asia. The egg parasitoid Trichogramma ostriniae is an important biological control agent of ACB. The possibility of mass-producing T. ostriniae on the factitious host Chinese oak silkworm, Antheraea pernyi, via Multiparasitism with T. chilonis has been previously reported. Here, we evaluated the fitness parameters of A. pernyi-reared T. ostriniae via Multiparasitism and its potential to parasitize ACB eggs of different ages (12 h and 24 h) in comparison to T. ostriniae reared on eggs of rice moth, Corcyra cephalonica. The results showed that rearing host species affected body size, longevity and lifetime fecundity of T. ostriniae. The A. pernyi host produced T. ostriniae of larger body size (female: 641.8 µm, male: 556.1 µm) than C. cephalonica-reared T. ostriniae (female: 482.1 µm; male: 457.6 µm). Consequently, the A. pernyi-reared T.ostriniae females lived longer (14.1 d) and were more fecund (180.7) than were C. cephalonica-reared T. ostriniae females (longevity: 10.2 d; lifetime fecundity: 140.1). In addition, A. pernyi-reared T. ostriniae females parasitized greater numbers of target ACB eggs at different ages (12 h: 43.2; 24 h: 41.0) than did C. cephalonica-reared T. ostriniae (12 h: 35.2; 24 h: 31.4). These results demonstrated that the rearing host species impacted the performance of T. ostriniae in biological control of ACB and that the fitness of A. pernyi-reared T. ostriniae females was higher than that of C. cephalonica-reared T. ostriniae females, which should render them more effective biological control agents of ACB.
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Impact of Trichogramma parasitoid age on the outcome of Multiparasitism in the factitious host eggs of Chinese oak silkworm, Antheraea pernyi
Journal of Pest Science, 2020Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Asad Ali, Lucie S. Monticelli, Nicolas Desneux, Lian-sheng ZangAbstract:The age of Trichogramma parasitoids could influence biological traits which are of great importance for effectiveness of mass rearing systems. Recent studies demonstrated that Trichogramma ostriniae (TO) could parasitize Antheraea pernyi eggs through Multiparasitism along with other Trichogramma species, although few adults could emerge successfully. It is important to characterize the factors modulating the performance of TO on A. pernyi eggs, notably in order to try enhancing its quantitative emergence through Multiparasitism for further use in biological control. In this context, irrespective of host age, we tested different ages of TO females (from 0.5-day- to 6-day-old postemergence) in Multiparasitism with Trichogramma chilonis (TC) on A. pernyi eggs. The results of the present study confirmed that TO parasitism on A. pernyi eggs was largely age dependent. Higher percentage of Multiparasitism and higher number of emerged TO adults were recorded in the treatment where 3-day-old TO females were used for parasitization with TC on A. pernyi host. In addition, we also tested different female ratios of both Trichogramma species to find out an optimal ratio for use in mass production. The highest percentage of Multiparasitism, emergence and optimum emerged number of TO (per A. pernyi egg) was observed with the ratio 3:2 (TO:TC) per 1 host egg. This study demonstrated that the age of TO females can significantly affect their performance in Multiparasitism of large A. pernyi eggs. These results prompt for more research in order to develop an effective Multiparasitism-based production of TO at the industrial scale.
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Factitious host species impact on the outcome of Multiparasitism between egg parasitoids
Journal of Pest Science, 2019Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Lisheng Zhang, Lian-sheng ZangAbstract:Trichogramma parasitoids are biological control agents of a large number of lepidopterous pests. Mass production of these Trichogramma parasitoids is carried out on different factitious host eggs where the cost for mass rearing is high and the production efficiency is low. Therefore, efficient means and techniques for mass production of these parasitoids are needed. Host eggs of Chinese oak silkworm, Antheraea pernyi, not only proved effective for the mass production of a single Trichogramma species but also showed great potential for simultaneously producing two different Trichogramma species through Multiparasitism. Here, we evaluated the outcomes of Multiparasitism between Trichogramma chilonis and T. leucaniae reared on the eggs of two factitious hosts, Antheraea pernyi and Corcyra cephalonica. Our study indicated that parental wasps of both Trichogramma species reared on A. pernyi performed outstandingly in all aspects of Multiparasitism on A. pernyi eggs. In contrast, significantly low parasitism rates for parental wasps reared on C. cephalonica and subsequently low emergence rates for their offspring were recorded for Multiparasitism on A. pernyi eggs. Parental wasps reared on different host eggs significantly affected the emerged offspring numbers for both Trichogramma species per A. pernyi egg. Significantly high numbers of offspring for specific species of Trichogramma emerged per A. pernyi egg when the parental wasps of that species were reared on A. pernyi eggs compared to the other species reared on C. cephalonica eggs. The present study concluded that rearing host species had a great impact on the performance of parental wasps in the Multiparasitism of Trichogramma parasitoids on A. pernyi eggs and clearly confirmed that T. chilonis and T. leucaniae parasitoids can be massively produced on A. pernyi eggs through Multiparasitism. Our results provide useful information about rearing hosts, which could provide two different Trichogramma species in the field at a time for the suppression of pest populations.
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Multiparasitism with trichogramma dendrolimi on egg of Chinese oak silkworm, antheraea pernyi, enhances emergence of Trichogramma ostriniae
Journal of Pest Science, 2019Co-Authors: Chun-yu Tian, Yang-yang Hou, Lian-sheng Zang, Chang-chun Ruan, Xiangbing Yang, Lucie Monticelli, Nicolas DesneuxAbstract:Trichogramma parasitoids are important biological control agents for insect pest management. However, efficient means for mass production of Trichogramma parasitoids are needed, particularly for T. ostriniae, which often fail to form emergence holes on host eggs of Chinese oak silkworm, Antheraea pernyi, because of the hard chorion. In the present study, we evaluated the possibilities to enhance adult emergence of T. ostriniae by utilizing emergence holes made by T. dendrolimi during Multiparasitism on host eggs of A. pernyi and other biological parameters such as pre-emergence time, parasitism rate, and emergence rate of the two parasitoids, which were also evaluated between the two parasitism regimes of multi- and monoparasitism. Our data showed that Multiparasitism on host eggs of A. pernyi significantly facilitated the emergence of adult T. ostriniae. Generally, both Trichogramma species favored parasitizing A. pernyi eggs, with multiple parasitoid adults emerged per host egg. The overall performance of T. dendrolimi was similar between the two parasitism regimes, although a significantly higher number of unemerged adults were found in the multiparasitized eggs than in the monoparasitized. For T. ostriniae, significantly more adults emerged, and a higher emergence rate was recorded on host eggs multiparasitized with T. dendrolimi than that on monoparasitized. Furthermore, significantly fewer unemerged adults were found in multi- than monoparasitized host eggs. The results of this study provided useful information on the feasibility of mass production of T. ostriniae via Multiparasitism with T. dendrolimi on large eggs of A. pernyi.
Yang-yang Hou - One of the best experts on this subject based on the ideXlab platform.
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rearing trichogramma ostriniae on the factitious host antheraea pernyi via Multiparasitism with trichogramma chilonis facilitates enhanced biocontrol potential against ostrinia furnacalis
Biological Control, 2021Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Chang-chun Ruan, Muhammad Qayash Khan, Lian-sheng ZangAbstract:Abstract The Asian corn borer (ACB) Ostrinia furnacalis is a voracious pest of corn in Asia. The egg parasitoid Trichogramma ostriniae is an important biological control agent of ACB. The possibility of mass-producing T. ostriniae on the factitious host Chinese oak silkworm, Antheraea pernyi, via Multiparasitism with T. chilonis has been previously reported. Here, we evaluated the fitness parameters of A. pernyi-reared T. ostriniae via Multiparasitism and its potential to parasitize ACB eggs of different ages (12 h and 24 h) in comparison to T. ostriniae reared on eggs of rice moth, Corcyra cephalonica. The results showed that rearing host species affected body size, longevity and lifetime fecundity of T. ostriniae. The A. pernyi host produced T. ostriniae of larger body size (female: 641.8 µm, male: 556.1 µm) than C. cephalonica-reared T. ostriniae (female: 482.1 µm; male: 457.6 µm). Consequently, the A. pernyi-reared T.ostriniae females lived longer (14.1 d) and were more fecund (180.7) than were C. cephalonica-reared T. ostriniae females (longevity: 10.2 d; lifetime fecundity: 140.1). In addition, A. pernyi-reared T. ostriniae females parasitized greater numbers of target ACB eggs at different ages (12 h: 43.2; 24 h: 41.0) than did C. cephalonica-reared T. ostriniae (12 h: 35.2; 24 h: 31.4). These results demonstrated that the rearing host species impacted the performance of T. ostriniae in biological control of ACB and that the fitness of A. pernyi-reared T. ostriniae females was higher than that of C. cephalonica-reared T. ostriniae females, which should render them more effective biological control agents of ACB.
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Impact of Trichogramma parasitoid age on the outcome of Multiparasitism in the factitious host eggs of Chinese oak silkworm, Antheraea pernyi
Journal of Pest Science, 2020Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Asad Ali, Lucie S. Monticelli, Nicolas Desneux, Lian-sheng ZangAbstract:The age of Trichogramma parasitoids could influence biological traits which are of great importance for effectiveness of mass rearing systems. Recent studies demonstrated that Trichogramma ostriniae (TO) could parasitize Antheraea pernyi eggs through Multiparasitism along with other Trichogramma species, although few adults could emerge successfully. It is important to characterize the factors modulating the performance of TO on A. pernyi eggs, notably in order to try enhancing its quantitative emergence through Multiparasitism for further use in biological control. In this context, irrespective of host age, we tested different ages of TO females (from 0.5-day- to 6-day-old postemergence) in Multiparasitism with Trichogramma chilonis (TC) on A. pernyi eggs. The results of the present study confirmed that TO parasitism on A. pernyi eggs was largely age dependent. Higher percentage of Multiparasitism and higher number of emerged TO adults were recorded in the treatment where 3-day-old TO females were used for parasitization with TC on A. pernyi host. In addition, we also tested different female ratios of both Trichogramma species to find out an optimal ratio for use in mass production. The highest percentage of Multiparasitism, emergence and optimum emerged number of TO (per A. pernyi egg) was observed with the ratio 3:2 (TO:TC) per 1 host egg. This study demonstrated that the age of TO females can significantly affect their performance in Multiparasitism of large A. pernyi eggs. These results prompt for more research in order to develop an effective Multiparasitism-based production of TO at the industrial scale.
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Factitious host species impact on the outcome of Multiparasitism between egg parasitoids
Journal of Pest Science, 2019Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Lisheng Zhang, Lian-sheng ZangAbstract:Trichogramma parasitoids are biological control agents of a large number of lepidopterous pests. Mass production of these Trichogramma parasitoids is carried out on different factitious host eggs where the cost for mass rearing is high and the production efficiency is low. Therefore, efficient means and techniques for mass production of these parasitoids are needed. Host eggs of Chinese oak silkworm, Antheraea pernyi, not only proved effective for the mass production of a single Trichogramma species but also showed great potential for simultaneously producing two different Trichogramma species through Multiparasitism. Here, we evaluated the outcomes of Multiparasitism between Trichogramma chilonis and T. leucaniae reared on the eggs of two factitious hosts, Antheraea pernyi and Corcyra cephalonica. Our study indicated that parental wasps of both Trichogramma species reared on A. pernyi performed outstandingly in all aspects of Multiparasitism on A. pernyi eggs. In contrast, significantly low parasitism rates for parental wasps reared on C. cephalonica and subsequently low emergence rates for their offspring were recorded for Multiparasitism on A. pernyi eggs. Parental wasps reared on different host eggs significantly affected the emerged offspring numbers for both Trichogramma species per A. pernyi egg. Significantly high numbers of offspring for specific species of Trichogramma emerged per A. pernyi egg when the parental wasps of that species were reared on A. pernyi eggs compared to the other species reared on C. cephalonica eggs. The present study concluded that rearing host species had a great impact on the performance of parental wasps in the Multiparasitism of Trichogramma parasitoids on A. pernyi eggs and clearly confirmed that T. chilonis and T. leucaniae parasitoids can be massively produced on A. pernyi eggs through Multiparasitism. Our results provide useful information about rearing hosts, which could provide two different Trichogramma species in the field at a time for the suppression of pest populations.
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Multiparasitism with trichogramma dendrolimi on egg of Chinese oak silkworm, antheraea pernyi, enhances emergence of Trichogramma ostriniae
Journal of Pest Science, 2019Co-Authors: Chun-yu Tian, Yang-yang Hou, Lian-sheng Zang, Chang-chun Ruan, Xiangbing Yang, Lucie Monticelli, Nicolas DesneuxAbstract:Trichogramma parasitoids are important biological control agents for insect pest management. However, efficient means for mass production of Trichogramma parasitoids are needed, particularly for T. ostriniae, which often fail to form emergence holes on host eggs of Chinese oak silkworm, Antheraea pernyi, because of the hard chorion. In the present study, we evaluated the possibilities to enhance adult emergence of T. ostriniae by utilizing emergence holes made by T. dendrolimi during Multiparasitism on host eggs of A. pernyi and other biological parameters such as pre-emergence time, parasitism rate, and emergence rate of the two parasitoids, which were also evaluated between the two parasitism regimes of multi- and monoparasitism. Our data showed that Multiparasitism on host eggs of A. pernyi significantly facilitated the emergence of adult T. ostriniae. Generally, both Trichogramma species favored parasitizing A. pernyi eggs, with multiple parasitoid adults emerged per host egg. The overall performance of T. dendrolimi was similar between the two parasitism regimes, although a significantly higher number of unemerged adults were found in the multiparasitized eggs than in the monoparasitized. For T. ostriniae, significantly more adults emerged, and a higher emergence rate was recorded on host eggs multiparasitized with T. dendrolimi than that on monoparasitized. Furthermore, significantly fewer unemerged adults were found in multi- than monoparasitized host eggs. The results of this study provided useful information on the feasibility of mass production of T. ostriniae via Multiparasitism with T. dendrolimi on large eggs of A. pernyi.
Asim Iqbal - One of the best experts on this subject based on the ideXlab platform.
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rearing trichogramma ostriniae on the factitious host antheraea pernyi via Multiparasitism with trichogramma chilonis facilitates enhanced biocontrol potential against ostrinia furnacalis
Biological Control, 2021Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Chang-chun Ruan, Muhammad Qayash Khan, Lian-sheng ZangAbstract:Abstract The Asian corn borer (ACB) Ostrinia furnacalis is a voracious pest of corn in Asia. The egg parasitoid Trichogramma ostriniae is an important biological control agent of ACB. The possibility of mass-producing T. ostriniae on the factitious host Chinese oak silkworm, Antheraea pernyi, via Multiparasitism with T. chilonis has been previously reported. Here, we evaluated the fitness parameters of A. pernyi-reared T. ostriniae via Multiparasitism and its potential to parasitize ACB eggs of different ages (12 h and 24 h) in comparison to T. ostriniae reared on eggs of rice moth, Corcyra cephalonica. The results showed that rearing host species affected body size, longevity and lifetime fecundity of T. ostriniae. The A. pernyi host produced T. ostriniae of larger body size (female: 641.8 µm, male: 556.1 µm) than C. cephalonica-reared T. ostriniae (female: 482.1 µm; male: 457.6 µm). Consequently, the A. pernyi-reared T.ostriniae females lived longer (14.1 d) and were more fecund (180.7) than were C. cephalonica-reared T. ostriniae females (longevity: 10.2 d; lifetime fecundity: 140.1). In addition, A. pernyi-reared T. ostriniae females parasitized greater numbers of target ACB eggs at different ages (12 h: 43.2; 24 h: 41.0) than did C. cephalonica-reared T. ostriniae (12 h: 35.2; 24 h: 31.4). These results demonstrated that the rearing host species impacted the performance of T. ostriniae in biological control of ACB and that the fitness of A. pernyi-reared T. ostriniae females was higher than that of C. cephalonica-reared T. ostriniae females, which should render them more effective biological control agents of ACB.
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Impact of Trichogramma parasitoid age on the outcome of Multiparasitism in the factitious host eggs of Chinese oak silkworm, Antheraea pernyi
Journal of Pest Science, 2020Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Asad Ali, Lucie S. Monticelli, Nicolas Desneux, Lian-sheng ZangAbstract:The age of Trichogramma parasitoids could influence biological traits which are of great importance for effectiveness of mass rearing systems. Recent studies demonstrated that Trichogramma ostriniae (TO) could parasitize Antheraea pernyi eggs through Multiparasitism along with other Trichogramma species, although few adults could emerge successfully. It is important to characterize the factors modulating the performance of TO on A. pernyi eggs, notably in order to try enhancing its quantitative emergence through Multiparasitism for further use in biological control. In this context, irrespective of host age, we tested different ages of TO females (from 0.5-day- to 6-day-old postemergence) in Multiparasitism with Trichogramma chilonis (TC) on A. pernyi eggs. The results of the present study confirmed that TO parasitism on A. pernyi eggs was largely age dependent. Higher percentage of Multiparasitism and higher number of emerged TO adults were recorded in the treatment where 3-day-old TO females were used for parasitization with TC on A. pernyi host. In addition, we also tested different female ratios of both Trichogramma species to find out an optimal ratio for use in mass production. The highest percentage of Multiparasitism, emergence and optimum emerged number of TO (per A. pernyi egg) was observed with the ratio 3:2 (TO:TC) per 1 host egg. This study demonstrated that the age of TO females can significantly affect their performance in Multiparasitism of large A. pernyi eggs. These results prompt for more research in order to develop an effective Multiparasitism-based production of TO at the industrial scale.
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Factitious host species impact on the outcome of Multiparasitism between egg parasitoids
Journal of Pest Science, 2019Co-Authors: Asim Iqbal, Yang-yang Hou, Yong-ming Chen, Nicolas Desneux, Lisheng Zhang, Lian-sheng ZangAbstract:Trichogramma parasitoids are biological control agents of a large number of lepidopterous pests. Mass production of these Trichogramma parasitoids is carried out on different factitious host eggs where the cost for mass rearing is high and the production efficiency is low. Therefore, efficient means and techniques for mass production of these parasitoids are needed. Host eggs of Chinese oak silkworm, Antheraea pernyi, not only proved effective for the mass production of a single Trichogramma species but also showed great potential for simultaneously producing two different Trichogramma species through Multiparasitism. Here, we evaluated the outcomes of Multiparasitism between Trichogramma chilonis and T. leucaniae reared on the eggs of two factitious hosts, Antheraea pernyi and Corcyra cephalonica. Our study indicated that parental wasps of both Trichogramma species reared on A. pernyi performed outstandingly in all aspects of Multiparasitism on A. pernyi eggs. In contrast, significantly low parasitism rates for parental wasps reared on C. cephalonica and subsequently low emergence rates for their offspring were recorded for Multiparasitism on A. pernyi eggs. Parental wasps reared on different host eggs significantly affected the emerged offspring numbers for both Trichogramma species per A. pernyi egg. Significantly high numbers of offspring for specific species of Trichogramma emerged per A. pernyi egg when the parental wasps of that species were reared on A. pernyi eggs compared to the other species reared on C. cephalonica eggs. The present study concluded that rearing host species had a great impact on the performance of parental wasps in the Multiparasitism of Trichogramma parasitoids on A. pernyi eggs and clearly confirmed that T. chilonis and T. leucaniae parasitoids can be massively produced on A. pernyi eggs through Multiparasitism. Our results provide useful information about rearing hosts, which could provide two different Trichogramma species in the field at a time for the suppression of pest populations.