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Serguei V Triapitsyn - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of biological traits of Anagyrus cachamai and Anagyrus lapachosus to assess their potential as biological control candidate agents against Harrisia cactus mealybug pest in Puerto Rico
    BioControl, 2019
    Co-Authors: María B. Aguirre, Serguei V Triapitsyn, Guillermo A. Logarzo, Hilda Diaz-soltero, Stephen D. Hight, Octavio A. Bruzzone
    Abstract:

    The Harrisia cactus mealybug (HCM), Hypogeococcus sp. (Hemiptera: Pseudococcidae), is devastating native cacti in Puerto Rico and threatens cacti throughout the Caribbean, Mexico, Central and North America. In South America, its native area, various natural enemies keep HCM under control. Two South American parasitoids, Anagyrus cachamai Triapitsyn, Logarzo & Aguirre and A. lapachosus Triapitsyn, Aguirre & Logarzo (Hymenoptera: Encyrtidae), were selected as potential biological control agents. Rearing protocol to conduct mass production, specificity studies and several aspects of the biology of these species were studied under laboratory conditions in Argentina. Anagyrus cachamai and A. lapachosus successfully attacked early instars of Hypogeococcus sp., have a balanced sex ratio, exhibited a development time synchronized with that of the host, and presented differences in their reproductive biology and development time. All these characteristics make these parasitoids promising candidates for introduction as biological control agents against the HCM pest in Puerto Rico.

  • egg parasitoids of the tea green leafhopper empoasca onukii hemiptera cicadellidae in japan with description of a new species of Anagrus hymenoptera mymaridae
    ZooKeys, 2019
    Co-Authors: Serguei V Triapitsyn, Paul F Rugmanjones, Tetsuya Adachihagimori, Adema Barry, Kazunori Matsuo, Kazuro Ohno
    Abstract:

    Fairyfly (Hymenoptera, Mymaridae) egg parasitoids of the tea green leafhopper Empoasca (Matsumurasca) onukii Matsuda (Hemiptera, Cicadellidae), an economically important pest in Asia of the tea plant, Camelliasinensis, were identified from specimens reared in Japan. Using a combination of genetic and morphological evidence, Anagrus (Anagrus) rugmanjonesi Triapitsyn & Adachi-Hagimori, sp. n., is described and illustrated. It is shown to be different from the most similar A.turpanicus Triapitsyn & Hu, an egg parasitoid of a leafhopper pest of cultivated grapes which is known from Xinjiang Uyghur Autonomous Region in China. Mitochondrial and nuclear ribosomal DNA sequence data provide clear evidence for the separation of A.rugmanjonesi from A.turpanicus and other members of the Anagrusincarnatus Haliday species complex. A key to females of the Japanese species of Anagrus Haliday is given. Two other species of Mymaridae, Aresconenocki (Subba Rao & Kaur) and Stethyniumempoascae Subba Rao, are also identified, albeit the latter one only tentatively. Both latter taxa are newly recorded from Japan, and E.onukii represents their new host association.

  • molecular morphological and biological differentiation between Anagrus virlai sp n an egg parasitoid of the corn leafhopper dalbulus maidis hemiptera cicadellidae in the new world and Anagrus incarnatus from the palaearctic region hymenoptera mymarid
    Neotropical Entomology, 2019
    Co-Authors: Serguei V Triapitsyn, Paul F Rugmanjones, P S Tretiakov, Luft E Albarracin, Gustavo Moyaraygoza, Ranyse B Querino
    Abstract:

    The common New World egg parasitoid of the corn leafhopper Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae), an economically important pest of maize from Argentina to southern USA, has long been misidentified as the Palaearctic species Anagrus incarnatus Haliday or its synonym A. breviphragma Soyka (Hymenoptera: Mymaridae). Using a combination of genetic and morphometric methods, and available biological information, specimens reared from eggs of D. maidis in Argentina and Mexico, described and illustrated here as Anagrus (Anagrus) virlai Triapitsyn sp. n., are shown to be different from those of A. incarnatus from the Palaearctic region. Mitochondrial and nuclear ribosomal DNA sequence data provide clear evidence for the separation of the two species. Anagrus virlai is also known from Brazil, Colombia, Guadeloupe (France), and Guyana.

  • new synonymies in the Anagrus incarnatus haliday species complex hymenoptera mymaridae including a common parasitoid of economically important planthopper hemiptera delphacidae pests of rice in asia
    Journal of Natural History, 2018
    Co-Authors: Serguei V Triapitsyn, Paul F Rugmanjones, Peter S Tretiakov, Hsientsung Shih, Shouhorng Huang
    Abstract:

    ABSTRACTAnagrus nilaparvartae Pang and Wang has been recorded frequently as an egg parasitoid of rice planthoppers in SE Asia, especially of brown planthopper Nilaparvata lugens (Stal). However, what appears to be the same species was often identified either as the morphologically similar Holarctic species Anagrus incarnatosimilis Soyka (as A. incarnatus Haliday) or misidentified as an unrelated, strictly New World species A. flaveolus Waterhouse, which, unlike A. nilaparvartae, does not belong to the A. incarnatus ‘species complex’ of Anagrus (Anagrus Haliday). Besides being mostly geographically separate from each other (except in the Eastern Palaearctic region), A. nilaparvatae and A. incarnatosimilis were not known to share any hosts. Using a combination of genetic analyses and morphometric methods, specimens of A. incarnatosimilis collected in Europe were shown to be not significantly different from those of A. nilaparvatae reared from eggs of rice planthoppers and leafhoppers mainly in Taiwan and al...

  • Anagrus dmitrievi sp n hymenoptera mymaridae an egg parasitoid of zyginidia eremita hemiptera cicadellidae a pest of maize in xinjiang china
    ZooKeys, 2018
    Co-Authors: Qin Li, Serguei V Triapitsyn, Hongying Hu, Long Yi, Jiaxiong Lu
    Abstract:

    A new Palaearctic species of Anagrus Haliday (Hymenoptera, Mymaridae), A. (Anagrus) dmitrievi Triapitsyn & Hu, sp. n., is described, diagnosed, and illustrated from Xinjiang Uyghur Autonomous Region of China. It was reared from parasitized eggs of the leafhopper Zyginidia (Zyginidia) eremita Zachvatkin (Hemiptera, Cicadellidae) on leaves of maize. A key to the 21 named species of Anagrus known from China is provided. Zyginidia eremita is an important economic pest in Xinjiang, occurring in approximately 90% of maize fields. The phenology and life cycle of Z. eremita is summarized. Parasitism of its eggs by A. dmitrievi in maize fields was 12-75 % (average about 38 %), thus making it a rather effective natural enemy.

Ranyse B Querino - One of the best experts on this subject based on the ideXlab platform.

G Viggiani - One of the best experts on this subject based on the ideXlab platform.

Joseph G Morse - One of the best experts on this subject based on the ideXlab platform.

  • morphological and molecular differentiation of the Anagrus epos species complex hymenoptera mymaridae egg parasitoids of leafhoppers hemiptera cicadellidae in north america
    Zootaxa, 2010
    Co-Authors: Serguei V Triapitsyn, Paul F Rugmanjones, Joseph G Morse, Gilsang Jeong, Richard Stouthamer
    Abstract:

    The Anagrus epos Girault species complex of the fairyfly wasp genus Anagrus Haliday (Hymenoptera: Mymaridae), egg parasitoids of Erasmoneura spp., Erythroneura spp., and other leafhoppers, is reviewed using both morphological and molecular methods. A new species, A. vulneratus Triapitsyn sp. n., is described and illustrated from specimens reared from eggs of the leafhopper Erasmoneura vulnerata (Fitch) (Hemiptera: Cicadellidae) on grapevines from Colorado, USA. Discussed and corrected are the earlier published host and distribution records of A. epos, which is rediagnosed, and also of A. daanei Triapitsyn. Nuclear ribosomal DNA sequence data provides a genetic signature for A. epos and within the remainder of the species complex identifies A. tretiakovae Triapitsyn as being the most divergent member, confirms A. vulneratus as a separate entity, and reveals the closer similarity of specimens from Sonora, Mexico, to A. vulneratus rather than A. epos. Sequences from individuals identified as A. daanei were somewhat heterogeneous and revealed the existence of two distinct rDNA families — one represented by A. daanei from the Pacific Northwest and one by specimens from Colorado. Both gene families were represented by specimens from California, USA, and this finding is discussed in relation to recent use of “A. epos” from Colorado as a biological control agent in California.

  • production of Anagrus epos girault hymenoptera mymaridae on homalodisca vitripennis germar hemiptera cicadellidae eggs
    Biological Control, 2009
    Co-Authors: Rodrigo Krugner, Marshall W Johnson, David J W Morgan, Joseph G Morse
    Abstract:

    Abstract Anagrus epos Girault (Hymenoptera: Mymaridae) is a natural enemy candidate for a classical biological control program targeting the glassy-winged sharpshooter (GWSS), Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), in California. Little is known about the biology or ecology of A. epos when it utilizes GWSS eggs as a host. Here, we report the results of laboratory studies that describe the host age preference for oviposition, longevity of A. epos adults provided with different food sources, and developmental rates at six different constant temperature regimes. Anagrus epos is a gregarious parasitoid in GWSS eggs with up to 14 adults emerging from each GWSS egg. In choice and no-choice tests for oviposition, A. epos females successfully parasitized all developmental ages of GWSS eggs (1–8 days old). In choice tests, parasitism rates were significantly higher in 1-, 3-, 4-, and 5-day-old GWSS eggs than in 2-, 6-, 7-, and 8-day-old eggs. If provided with honey and water, honey only, water only, or no food or water, A. epos females lived on average 8.2, 4.7, 2.6, and 1.6 days, respectively. Anagrus epos required 294.1 degree-days above a lower temperature threshold of 12.4 °C to develop from egg to adult (eclosion). Our results provide baseline information useful in the development of an efficient parasitoid mass rearing program for A. epos release and evaluation in California.

  • Host specificity of Anagrus epos: a potential biological control agent of Homalodisca vitripennis
    BioControl, 2008
    Co-Authors: Rodrigo Krugner, Marshall W Johnson, Russell L. Groves, Joseph G Morse
    Abstract:

    Anagrus epos Girault (Hymenoptera: Mymaridae) is a candidate for a classical biological control program targeting the glassy-winged sharpshooter (GWSS), Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), in California. Because mass production of GWSS is expensive and labor-intensive, a factitious host that is more economical to produce is desirable to mass produce A. epos for colonization and augmentation efforts. Here, we report the results of host specificity tests and potential rearing techniques for A. epos under laboratory conditions. Females discriminated and oviposited into eggs of seven cicadellid species: H. vitripennis , Circulifer tenellus (Baker), Erythroneura variabilis Beamer, Amblysellus grex (Oman), Graphocephala atropunctata (Signoret), Macrosteles severini Hamilton, and H. liturata Ball, and two cerambycid species: Phoracantha recurva Newman and P. semipunctata (F.). Anagrus epos successfully completed development in the eggs of H. vitripennis , C. tenellus , E. variabilis , A. grex , G. atropunctata , M. severini , and H. liturata . The use of a factitious host and potential nontarget effects of this generalist parasitoid are discussed.

  • THE Anagrus EPOS COMPLEX: A LIKELY SOURCE OF EFFECTIVE CLASSICAL BIOLOGICAL CONTROL AGENTS FOR GLASSY-WINGED SHARPSHOOTER CONTROL Project Leaders:
    2005
    Co-Authors: Joseph G Morse, Serguei V Triapitsyn, Richard Stouthamer, Mount Rubidoux, Rodney Mendes, Jonathan M. Lytle, Nick C. Toscano
    Abstract:

    The purpose of the work planned in this project is to determine whether the “Minnesota strain” of the mymarid, Anagrus epos Girault (A. epos), we have in culture on glassy-winged sharpshooter (GWSS) is the same species as A. epos strains previously released in California, how it compares with other ”A. epos” strains, and whether there are other strains of ”A. epos” that should be imported for biological control of GWSS. Without understanding what species we have and how the Minnesota strain is related to similar strains, it is difficult to know how to proceed in selecting strains of this species to culture for massrearing and release in California for GWSS control. Concurrently, we will evaluate field releases and establishment of the Minnesota A. epos strain at six release sites in southern California.

Timothy E Martinson - One of the best experts on this subject based on the ideXlab platform.

  • influence of flowering cover crops on Anagrus parasitoids hymenoptera mymaridae and erythroneura leafhoppers homoptera cicadellidae in new york vineyards
    Agricultural and Forest Entomology, 2003
    Co-Authors: Greg Englishloeb, Timothy E Martinson, Marc Rhainds, Todd A Ugine
    Abstract:

    We tested the hypothesis that providing nectar-producing cover crops will enhance the biological control of grape leafhoppers (Erythroneura spp.) by Anagrus wasps in commercial vineyards in New York, U.S.A. 2 We established three cover crops between vine rows in a commercial vineyard: buckwheat (Fagopyrum esculentum (Moench)), clover (Trifolium repens L.) and mowed sod (Dactylis glomerata L.). 3 There was no effect of cover crop on adult Anagrus in 1996, whereas in 1997 adults were more abundant within edge vines with buckwheat compared to vines with clover or sod; adults were more abundant at the vineyard edge, especially early in the season. 4 Parasitism of 'sentinel' leafhopper eggs was higher on vines with buckwheat compared to parasitism on vines with clover or sod in 1996; a similar, non- significant trend, was observed in 1997. 5 Neither the abundance nor the distribution of leafhoppers was influenced by cover crops, although in 1997 there was a trend toward greater numbers of nymphs on edge vines with buckwheat. 6 In a cage experiment, parasitism by Anagrus of leafhopper eggs on grapes was greater when adults had access to flowering buckwheat rather than buckwheat without flowers. 7 In a laboratory study, longevity of female Anagrus was increased when pro- vided with honey or sugar water compared to water only or nothing. 8 Our results suggest that parasitism of grape leafhoppers by Anagrus may be enhanced by providing floral resources within vineyards in New York, although it is unclear whether this will produce meaningful reductions in pest abundance.

  • compatibility of chemical disease and insect management practices used in new york vineyards with biological control by Anagrus spp hymenoptera mymaridae parasitoids of erythroneura leafhoppers
    Biological Control, 2001
    Co-Authors: Timothy E Martinson, Livy Williams, Greg Englishloeb
    Abstract:

    Toxicity to Anagrus spp. of fungicides and insecticides used in grape production was assessed with laboratory and field bioassays. Field-equivalent rates of fungicides were relatively nontoxic to Anagrus spp. adults in laboratory bioassays. In bioassays with field-weathered residues, sulfur (9600 ppm) caused elevated mortality of adults for 14 to 21 days posttreatment. Residues of microencapsulated methyl parathion (600 and 1200 ppm) increased mortality relative to the control up to 43 days posttreatment. Duration of elevated mortality of adults exposed to carbaryl was dose dependent and ranged from 14 (at 1200 ppm) to >43 days (at 4800 ppm). Residues of carbaryl and methyl parathion applied over parasitized eggs had little effect on emergence, but may have delayed development. In a field trial, adults trapped in carbaryl-treated plots were significantly reduced starting 3 weeks after treatment. Subsequent lower trap catches may have been related to effects of residues on Anagrus spp. adults or to lower leafhopper egg densities in treated plots.

  • colonization of new york vineyards by Anagrus spp hymenoptera mymaridae overwintering biology within vineyard distribution of wasps and parasitism of grape leafhopper erythroneura spp homoptera cicadellidae eggs
    Biological Control, 2000
    Co-Authors: Livy Williams, Timothy E Martinson
    Abstract:

    Received February 16, 1999; accepted January 17, 2000 A study was conducted in New York to identify the Anagrus species present in vineyards, to determine the plants in which Anagrus species overwinter, and to characterize the dispersal of wasps and level of parasitism of grape leafhopper eggs in vineyards. Anagrus daanei S. Triapitsyn and Anagrus erythroneurae S. Trjapitzin and Chiappini were the most abundant species reared from Vitis labrusca Bailey and Vitis vinifera L. cultivars, respectively. V. labrusca cultivars are infested predominantly by Erythroneura comes (Say), whereas V. vinifera cultivars are infested primarily by the Erythroneura vitifex Fitch‐Erythroneura bistrata McAtee complex. Anagrus tretiakovae S. Triapitsyn was reared from seven grape cultivars in approximately equal proportions. Thus, A. daanei and A. erythroneurae appear to possess greater degrees of host specificity than A. tretiakovae. These results support the belief that, although Anagrus species have relatively broad host associations, host preferences do exist. These preferences may be mediated by the plant associations of particular leafhopper species. Anagrus species use alternate hosts that infest several plant species. In particular, diapausing insect eggs in Acer saccharum Marshall, Robinia pseudo-acacia L., Rosa multiflora Thunberg, Salix nigra L., Vitis riparia Michaux, and Zanthoxylum americanum Miller may play important roles in the overwintering biology of the Anagrus species that are most abundant in vineyards. Following emergence from overwintering hosts, Anagrus adults are aggregated at the vineyard edge early in the season (May and June). By midseason or later (August and September), the pattern of wasp colonization and parasitism indicates that parasitoids are more widely dispersed in the vineyards. This pattern is consistent with colonization from vineyard edges, followed by relatively slow dispersal into the vineyard interior. Further investigations are necessary to identify the alternate host(s) that Anagrus exploits during the winter and spring and to delineate the phenology of such alternate hosts, as well as that of the grape leafhoppers and Anagrus species in the spring. Habitat management studies could then be conducted to identify strategies that would accelerate population growth of Anagrus in the spring and increase the rate of dispersal into vineyards. © 2000 Academic Press

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