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Le Kang - One of the best experts on this subject based on the ideXlab platform.
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female adult puncture induced plant volatiles promote mating success of the pea Leafminer via enhancing vibrational signals
Philosophical Transactions of the Royal Society B, 2019Co-Authors: Junnan Yang, Jianing Wei, Le KangAbstract:Herbivore-induced plant volatiles (HIPVs) synergize with the sex pheromones of herbivorous insects to facilitate mate location. However, the synergism of HIPVs and acoustic signals for sexual communication remains unknown. Here, we investigated the synergy between HIPVs and vibrational duets for sexual communication and mating in the pea Leafminer ( Liriomyza huidobrensis). Our results indicated that adult Leafminers do not produce species-specific pheromone, and female-puncture-induced plant volatiles facilitate the attraction of both sexes to host plant leaves and sexual encounters. Insect-derived cues do not participate in mate locations. Both sexes do not produce qualitatively different cuticular hydrocarbons (CHCs), and CHCs from females cannot elicit the antennal and behavioural responses of males. By contrast, induced green leaf volatiles, terpenoids and oximes elicit dramatic antennal responses in both sexes. Electrophysiological and behavioural tests consistently showed that the volatiles (Z)-3-hexenol and (Z)-3-hexenyl-acetate elicited the most intense gas chromatographic-electroantennographic responses, and attracted males and females. Remarkably, these volatiles significantly promoted the occurrence of vibrational duets between the sexes, thereby increasing the mating success of Leafminers. Therefore, the synergism of HIPVs and vibrational signals largely promoted the mating success of Leafminers, suggesting an alternative control strategy through precision trapping for non-pheromone-producing insects. This article is part of the theme issue 'Biotic signalling sheds light on smart pest management'.
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antagonism between herbivore induced plant volatiles and trichomes affects tritrophic interactions
Plant Cell and Environment, 2013Co-Authors: Chuanyou Li, Feng Ge, Le KangAbstract:We used tomato genotypes deficient in the jasmonic acid (JA) pathway to study the interaction between the production of herbivore-induced plant volatiles (HIPVs) that serve as information cues for herbivores as well as natural enemies of herbivores, and the production of foliar trichomes as defence barriers. We found that jasmonic acid-insensitive1 (jai1) mutant plants with both reduced HIPVs and trichome production received higher oviposition of adult Leafminers, which were more likely to be parasitized by the Leafminer parasitoids than JA biosynthesis spr2 mutant plants deficient in HIPVs but not trichomes. We also showed that the preference and acceptance of Leafminers and parasitoids to trichome-removed plants from either spr2 or wild-type (WT) genotypes over trichome-intact genotypes can be ascribed to the reduced trichomes on treated plants, but not to altered direct and indirect defence traits such as JA, proteinase inhibitor (PI)-II and HIPVs levels. Although the HIPVs of WT plants were more attractive to adult insects, the insects preferred trichome-free jai1 plants for oviposition and also had greater reproductive success on these plants. Our results provide strong evidence that antagonism between HIPV emission and trichome production affects tritrophic interactions. The interactions among defence traits are discussed.
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transcriptome response analysis of arabidopsis thaliana to Leafminer liriomyza huidobrensis
BMC Plant Biology, 2012Co-Authors: Sufang Zhang, Zhen Zhang, Le KangAbstract:Background Plants have evolved a complicated resistance system and exhibit a variety of defense patterns in response to different attackers. Previous studies have shown that responses of plants to chewing insects and phloem-feeding insects are significantly different. Less is known, however, regarding molecular responses to Leafminer insects. To investigate plant transcriptome response to Leafminers, we selected the Leafminer Liriomyza huidobrensis, which has a special feeding pattern more similar to pathogen damage than that of chewing insects, as a model insect, and Arabidopsis thaliana as a response plant.
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transcriptome response analysis of arabidopsis thaliana to Leafminer liriomyza huidobrensis
BMC Plant Biology, 2012Co-Authors: Sufang Zhang, Zhen Zhang, Le KangAbstract:Plants have evolved a complicated resistance system and exhibit a variety of defense patterns in response to different attackers. Previous studies have shown that responses of plants to chewing insects and phloem-feeding insects are significantly different. Less is known, however, regarding molecular responses to Leafminer insects. To investigate plant transcriptome response to Leafminers, we selected the Leafminer Liriomyza huidobrensis, which has a special feeding pattern more similar to pathogen damage than that of chewing insects, as a model insect, and Arabidopsis thaliana as a response plant. We first investigated local and systemic responses of A. thaliana to Leafminer feeding using an Affymetrix ATH1 genome array. Genes related to metabolic processes and stimulus responses were highly regulated. Most systemically-induced genes formed a subset of the local response genes. We then downloaded gene expression data from online databases and used hierarchical clustering to explore relationships among gene expression patterns in A. thaliana damaged by different attackers. Our results demonstrate that plant response patterns are strongly coupled to damage patterns of attackers.
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plants attract parasitic wasps to defend themselves against insect pests by releasing hexenol
PLOS ONE, 2007Co-Authors: Jianing Wei, Sufang Zhang, Lizhong Wang, Junwei Zhu, Owi I Nandi, Le KangAbstract:BackgroundPlant volatiles play an important role in defending plants against insect attacks by attracting their natural enemies. For example, green leaf volatiles (GLVs) and terpenoids emitted from herbivore-damaged plants were found to be important in the host location of parasitic wasps. However, evidence of the functional roles and mechanisms of these semio-chemicals from a system of multiple plants in prey location by the parasitoid is limited. Little is known about the potential evolutionary trends between herbivore-induced host plant volatiles and the host location of their parasitoids.Methodology/Principal FindingsThe present study includes hierarchical cluster analyses of plant volatile profiles from seven families of host and non-host plants of pea Leafminer, Liriomyza huidobrensis, and behavioral responses of a naive parasitic wasp, Opius dissitus, to some principal volatile compounds. Here we show that plants can effectively pull wasps, O. dissitus, towards them by releasing a universally induced compound, (Z)-3-hexenol, and potentially keep these plants safe from parasitic assaults by Leafminer pests, L. huidobrensis. Specifically, we found that volatile profiles from healthy plants revealed a partly phylogenetic signal, while the inducible compounds of the infested-plants did not result from the fact that the induced plant volatiles dominate most of the volatile blends of the host and non-host plants of the Leafminer pests. We further show that the parasitoids are capable of distinguishing the damaged host plant from the non-host plant of the Leafminers.Conclusions/SignificanceOur results suggest that, as the most passive scenario of plant involvement, Leafminers and mechanical damages evoke similar semio-chemicals. Using ubiquitous compounds, such as hexenol, for host location by general parasitoids could be an adaptation of the most conservative evolution of tritrophic interaction. Although for this, other compounds may be used to improve the precision of the host location by the parasitoids.
Sunday Ekesi - One of the best experts on this subject based on the ideXlab platform.
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endophytic colonization of vicia faba and phaseolus vulgaris fabaceae by fungal pathogens and their effects on the life history parameters of liriomyza huidobrensis diptera agromyzidae
Fungal Ecology, 2013Co-Authors: Nguya K Maniania, K K M Fiaboe, J Van Den Berg, Sunday EkesiAbstract:Abstract Ten fungal isolates belonging to the genera Beauveria (3), Hypocrea (1), Gibberella (1), Metarhizium (2), Trichoderma (1) and Fusarium (2) were evaluated in the laboratory to determine whether they could become endophytic in two pea Leafminer ( Liriomyza huidobrensis ) host plants ( Vicia faba and Phaseolus vulgaris ), and to assess their possible negative effects on Leafminers. Beauveria (ICIPE279), Hypocrea , Gibberella , Fusarium and Trichoderma isolates colonized roots, stems and leaves of both host plant species. Beauveria isolates G1LU3 and S4SU1 colonized roots, stems, and leaves of P. vulgaris but only the root and stem of V. faba . Isolates of Metarhizium failed to colonize the two host plants. The effects of endophytically colonized fungal pathogens on mortality, oviposition, emergence and longevity of L. huidobrensis were investigated after endophytic colonization of V. faba plants. All the fungal isolates that succeeded in colonizing the host plant were pathogenic to L. huidobrensis , causing 100 % mortality within 13.2 ± 0.7–15.0 ± 0.6 d. However, Hypocrea outperformed the other isolates ( p p Hypocrea (21.4 %) and Beauveria (38.0 %) treatments compared to the control (82.9 %).
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endophytic colonization of vicia faba and phaseolus vulgaris fabaceae by fungal pathogens and their effects on the life history parameters of liriomyza huidobrensis diptera agromyzidae
Fungal Ecology, 2013Co-Authors: Nguya K Maniania, K K M Fiaboe, J Van Den Berg, Komivi Senyo Akutse, Sunday EkesiAbstract:Abstract Ten fungal isolates belonging to the genera Beauveria (3), Hypocrea (1), Gibberella (1), Metarhizium (2), Trichoderma (1) and Fusarium (2) were evaluated in the laboratory to determine whether they could become endophytic in two pea Leafminer (Liriomyza huidobrensis) host plants (Vicia faba and Phaseolus vulgaris), and to assess their possible negative effects on Leafminers. Beauveria (ICIPE279), Hypocrea, Gibberella, Fusarium and Trichoderma isolates colonized roots, stems and leaves of both host plant species. Beauveria isolates G1LU3 and S4SU1 colonized roots, stems, and leaves of P. vulgaris but only the root and stem of V. faba. Isolates of Metarhizium failed to colonize the two host plants. The effects of endophytically colonized fungal pathogens on mortality, oviposition, emergence and longevity of L. huidobrensis were investigated after endophytic colonization of V. faba plants. All the fungal isolates that succeeded in colonizing the host plant were pathogenic to L. huidobrensis, causing 100 % mortality within 13.2 ± 0.7–15.0 ± 0.6 d. However, Hypocrea outperformed the other isolates (p
Komivi Senyo Akutse - One of the best experts on this subject based on the ideXlab platform.
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endophytic colonization of vicia faba and phaseolus vulgaris fabaceae by fungal pathogens and their effects on the life history parameters of liriomyza huidobrensis diptera agromyzidae
Fungal Ecology, 2013Co-Authors: Nguya K Maniania, K K M Fiaboe, J Van Den Berg, Komivi Senyo Akutse, Sunday EkesiAbstract:Abstract Ten fungal isolates belonging to the genera Beauveria (3), Hypocrea (1), Gibberella (1), Metarhizium (2), Trichoderma (1) and Fusarium (2) were evaluated in the laboratory to determine whether they could become endophytic in two pea Leafminer (Liriomyza huidobrensis) host plants (Vicia faba and Phaseolus vulgaris), and to assess their possible negative effects on Leafminers. Beauveria (ICIPE279), Hypocrea, Gibberella, Fusarium and Trichoderma isolates colonized roots, stems and leaves of both host plant species. Beauveria isolates G1LU3 and S4SU1 colonized roots, stems, and leaves of P. vulgaris but only the root and stem of V. faba. Isolates of Metarhizium failed to colonize the two host plants. The effects of endophytically colonized fungal pathogens on mortality, oviposition, emergence and longevity of L. huidobrensis were investigated after endophytic colonization of V. faba plants. All the fungal isolates that succeeded in colonizing the host plant were pathogenic to L. huidobrensis, causing 100 % mortality within 13.2 ± 0.7–15.0 ± 0.6 d. However, Hypocrea outperformed the other isolates (p
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Interrelationships between Diglyphus isaea, Phaedrotoma scabriventris and endophytic fungi in the control of Liriomyza Leafminers
2013Co-Authors: Komivi Senyo AkutseAbstract:v UITTREKSEL vii TABLE OF CONTENTS Pages ix List of tables xiv List of figures xv List of annexes xviii CHAPTER 1: GENERAL INTRODUCTION 1 1.0 Introduction 1 1.1 Statement of the problem and justification 3 1.2 Objectives 4 1.2.1 General objective 4 1.2.2 Specific objectives 4 1.3 Research hypotheses 5 References 5 CHAPTER 2: LITERATURE REVIEW 9 2.0 The genus Liriomyza 9 2.1 The biology of the genus Liriomyza 10 2.2 Geographical distribution of the pest in Africa 12 2.3 Economic importance of Liriomyza Leafminers 13 2.4 Control strategies for Leafminer flies 13 2.4.1 Chemical control 13 2.4.2 Biological control 14 2.4.3 Post-harvest treatment 16 2.5 The biology of leaf miner parasitoids 17 2.5.1 The ectoparasitoid Diglyphus isaea 17
Sufang Zhang - One of the best experts on this subject based on the ideXlab platform.
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transcriptome response analysis of arabidopsis thaliana to Leafminer liriomyza huidobrensis
BMC Plant Biology, 2012Co-Authors: Sufang Zhang, Zhen Zhang, Le KangAbstract:Background Plants have evolved a complicated resistance system and exhibit a variety of defense patterns in response to different attackers. Previous studies have shown that responses of plants to chewing insects and phloem-feeding insects are significantly different. Less is known, however, regarding molecular responses to Leafminer insects. To investigate plant transcriptome response to Leafminers, we selected the Leafminer Liriomyza huidobrensis, which has a special feeding pattern more similar to pathogen damage than that of chewing insects, as a model insect, and Arabidopsis thaliana as a response plant.
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transcriptome response analysis of arabidopsis thaliana to Leafminer liriomyza huidobrensis
BMC Plant Biology, 2012Co-Authors: Sufang Zhang, Zhen Zhang, Le KangAbstract:Plants have evolved a complicated resistance system and exhibit a variety of defense patterns in response to different attackers. Previous studies have shown that responses of plants to chewing insects and phloem-feeding insects are significantly different. Less is known, however, regarding molecular responses to Leafminer insects. To investigate plant transcriptome response to Leafminers, we selected the Leafminer Liriomyza huidobrensis, which has a special feeding pattern more similar to pathogen damage than that of chewing insects, as a model insect, and Arabidopsis thaliana as a response plant. We first investigated local and systemic responses of A. thaliana to Leafminer feeding using an Affymetrix ATH1 genome array. Genes related to metabolic processes and stimulus responses were highly regulated. Most systemically-induced genes formed a subset of the local response genes. We then downloaded gene expression data from online databases and used hierarchical clustering to explore relationships among gene expression patterns in A. thaliana damaged by different attackers. Our results demonstrate that plant response patterns are strongly coupled to damage patterns of attackers.
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plants attract parasitic wasps to defend themselves against insect pests by releasing hexenol
PLOS ONE, 2007Co-Authors: Jianing Wei, Sufang Zhang, Lizhong Wang, Junwei Zhu, Owi I Nandi, Le KangAbstract:BackgroundPlant volatiles play an important role in defending plants against insect attacks by attracting their natural enemies. For example, green leaf volatiles (GLVs) and terpenoids emitted from herbivore-damaged plants were found to be important in the host location of parasitic wasps. However, evidence of the functional roles and mechanisms of these semio-chemicals from a system of multiple plants in prey location by the parasitoid is limited. Little is known about the potential evolutionary trends between herbivore-induced host plant volatiles and the host location of their parasitoids.Methodology/Principal FindingsThe present study includes hierarchical cluster analyses of plant volatile profiles from seven families of host and non-host plants of pea Leafminer, Liriomyza huidobrensis, and behavioral responses of a naive parasitic wasp, Opius dissitus, to some principal volatile compounds. Here we show that plants can effectively pull wasps, O. dissitus, towards them by releasing a universally induced compound, (Z)-3-hexenol, and potentially keep these plants safe from parasitic assaults by Leafminer pests, L. huidobrensis. Specifically, we found that volatile profiles from healthy plants revealed a partly phylogenetic signal, while the inducible compounds of the infested-plants did not result from the fact that the induced plant volatiles dominate most of the volatile blends of the host and non-host plants of the Leafminer pests. We further show that the parasitoids are capable of distinguishing the damaged host plant from the non-host plant of the Leafminers.Conclusions/SignificanceOur results suggest that, as the most passive scenario of plant involvement, Leafminers and mechanical damages evoke similar semio-chemicals. Using ubiquitous compounds, such as hexenol, for host location by general parasitoids could be an adaptation of the most conservative evolution of tritrophic interaction. Although for this, other compounds may be used to improve the precision of the host location by the parasitoids.
Elton Lucio Araujo - One of the best experts on this subject based on the ideXlab platform.
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toxicity of insecticides used in melon crop to opius scabriventris a natural parasitoid of liriomyza sativae
Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences, 2020Co-Authors: Francisco Edivino Lopes Silva, Carlos Eduardo Souza Bezerra, Ewerton Marinho Costa, Elton Lucio AraujoAbstract:Opius scabriventris Nixon is an important parasitoid of the Leafminer Liriomyza sativae Blanchard in the melon crop (Cucumis melo L.). Knowing the impact of insecticides on this parasitoid may help the integrated pest management, thus allowing recommending insecticides with a lower impact. Therefore, this study evaluated lethal and sublethal toxicities of select insecticides used in the melon crop for controlling Leafminers on the O. scabriventris parasitoid. The toxicity of the insecticides was assessed by confining adults of the parasitoid on freshly sprayed plastic containers, under laboratory conditions. The evaluated insecticides were abamectin, chlorantraniliprole, cyromazine, spinetoram, spinosad, in addition to the negative control treatment (distilled water). The sublethal effect of the insecticides was studied through the parasitism of Leafminer larvae by surviving parasitoids. Among the evaluated insecticides, abamectin, spinetoram and spinosad were the most toxic to O. scabriventris; while chlorantraniliprole and cyromazine demonstrated low toxicity to the parasitoid, albeit causing reduction in its parasitism capacity.
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toxicidade de inseticidas utilizados na cultura do meloeiro para opius scabriventris um parasitoide natural de liriomyza sativae doi 10 5039 agraria v15i4a7264
Revista Brasileira de Ciências Agrárias (Agrária), 2020Co-Authors: Francisco Edivino Lopes Silva, Carlos Eduardo Souza Bezerra, Ewerton Marinho Costa, Elton Lucio AraujoAbstract:Opius scabriventris Nixon is an important parasitoid of the Leafminer Liriomyza sativae Blanchard in the melon crop ( Cucumis melo L.). Knowing the impact of insecticides on this parasitoid may help the integrated pest management, thus allowing recommending insecticides with a lower impact. Therefore, this study evaluated lethal and sublethal toxicities of select insecticides used in the melon crop for controlling Leafminers on the O. scabriventris parasitoid. The toxicity of the insecticides was assessed by confining adults of the parasitoid on freshly sprayed plastic containers, under laboratory conditions. The evaluated insecticides were abamectin, chlorantraniliprole, cyromazine, spinetoram, spinosad, in addition to the negative control treatment (distilled water). The sublethal effect of the insecticides was studied through the parasitism of Leafminer larvae by surviving parasitoids. Among the evaluated insecticides, abamectin, spinetoram and spinosad were the most toxic to O. scabriventris ; while chlorantraniliprole and cyromazine demonstrated low toxicity to the parasitoid, albeit causing reduction in its parasitism capacity.
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toxicity of insecticides used in melon crops to opius scabriventris hymenoptera braconidae toxicidade de inseticidas utilizados na cultura do meloeiro para opius scabriventris hymenoptera braconidae
Bioscience Journal, 2015Co-Authors: Elton Lucio Araujo, Carlos Eduardo Souza Bezerra, Carlos Henrique Feitosa Nogueira, Ewerton Marinho CostaAbstract:Melon cultivation is an important agricultural activity in the Northeastern Region of Brazil. During its commercial cultivation, the melon crop is attacked by pests, mainly Leafminers Liriomyza sativae Blanchard and Liriomyza trifolii (Burgess) (Diptera: Agromyzidae). To keep Leafminer populations below an economic issue level, it is essential to adopt control measures such as spraying insecticides and biological control. However, there is little information on the toxicity of insecticides used in the melon crop against Leafminers’ natural enemies. Therefore, the aim of this study was to evaluate the toxicity of insecticides used in melon crops against the parasitoid Opius scabriventris , a natural enemy of Leafminers from the genus Liriomyza (Diptera: Agromyzidae). The experiment was conducted under controlled laboratory conditions, in a completely randomized design, using two bioassays: I - Contact of parasitoids with a recently sprayed surface; and II - Contact of parasitoids with a surface containing dried residues of the insecticides that were significantly toxic in the bioassay I. In both bioassays, the toxicity of the insecticides was evaluated by observing parasitoid mortality. In bioassay I, from eight insecticides tested, only Cartap hydrochloride and Abamectin + mineral oil were considered harmful (Class 4) and Deltamethrin showed to be slightly harmful (class 2). Only Abamectin + mineral oil was harmful (Class 4) to the parasitoid O. scabriventris in the bioassay II. These are the first results regarding the effect of insecticides used in the management of melon pests on the parasitoid of the Leafminer fly O. scabriventris .
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Toxicity of insecticides used in melon crops to Opius scabriventris (Hymenoptera: braconidae)
'EDUFU - Editora da Universidade Federal de Uberlandia', 2015Co-Authors: Elton Lucio Araujo, Carlos Eduardo Souza Bezerra, Carlos Henrique Feitosa Nogueira, Ewerton Marinho CostaAbstract:Melon cultivation is an important agricultural activity in the Northeastern Region of Brazil. During its commercial cultivation, the melon crop is attacked by pests, mainly Leafminers Liriomyza sativae Blanchard and Liriomyza trifolii (Burgess) (Diptera: Agromyzidae). To keep Leafminer populations below an economic issue level, it is essential to adopt control measures such as spraying insecticides and biological control. However, there is little information on the toxicity of insecticides used in the melon crop against Leafminers' natural enemies. Therefore, the aim of this study was to evaluate the toxicity of insecticides used in melon crops against the parasitoid Opius scabriventris, a natural enemy of Leafminers from the genus Liriomyza (Diptera: Agromyzidae). The experiment was conducted under controlled laboratory conditions, in a completely randomized design, using two bioassays: I - Contact of parasitoids with a recently sprayed surface; and II - Contact of parasitoids with a surface containing dried residues of the insecticides that were significantly toxic in the bioassay I. In both bioassays, the toxicity of the insecticides was evaluated by observing parasitoid mortality. In bioassay I, from eight insecticides tested, only Cartap hydrochloride and Abamectin + mineral oil were considered harmful (Class 4) and Deltamethrin showed to be slightly harmful (class 2). Only Abamectin + mineral oil was harmful (Class 4) to the parasitoid O. scabriventris in the bioassay II. These are the first results regarding the effect of insecticides used in the management of melon pests on the parasitoid of the Leafminer fly O. scabriventris
