scholarly journals Effects of Temperature and Photoperiod on the Reproductive Biology and Diapause ofOobius agrili(Hymenoptera: Encyrtidae), an Egg Parasitoid of Emerald Ash Borer (Coleoptera: Buprestidae)

2016 ◽  
Vol 45 (3) ◽  
pp. 726-731 ◽  
Author(s):  
J. Hoban ◽  
J. J. Duan ◽  
J. Hough-Goldstein
Keyword(s):  
Reproductive Biology ◽  
Emerald Ash Borer ◽  
Egg Parasitoid ◽  
Effects Of Temperature

Natural enemies of emerald ash borer (Coleoptera: Buprestidae) in northeast China, with notes on two species of parasitic Coleoptera

2015 ◽  
Vol 148 (3) ◽  
pp. 329-342 ◽  
Author(s):  
Xiao-Yi Wang ◽  
Liang-Ming Cao ◽  
Zhong-Qi Yang ◽  
Jian J. Duan ◽  
Juli R. Gould ◽  
...  
Keyword(s):  
Natural Enemies ◽  
Geographic Origin ◽  
Emerald Ash Borer ◽  
Egg Parasitoid ◽  
Agrilus Planipennis ◽  
Liaoning Province ◽  
Natural Forests ◽  
Mortality Factors ◽  
Larval Parasitoid ◽  
Time Of Year

AbstractTo investigate natural enemies of emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), in northeastern China, we conducted field surveys of ash (Fraxinus Linnaeus (Oleaceae)) trees in semi-natural forests and plantations at variable EAB densities from 2008 to 2013. Our surveys revealed a complex of natural enemies including eight hymenopteran parasitoids and two apparently parasitic Coleoptera, woodpeckers, and several undetermined mortality factors. Parasitoid complex abundance and its contribution to EAB mortality varied with the time of year, type of ash stands, and geographic regions. The egg parasitoid Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae) and the larval parasitoid Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae) were frequently observed in Jilin, Liaoning, and Heilongjiang provinces and in Beijing, but not in Tianjin. Spathius agrili Yang (Hymenoptera: Braconidae), however, was more prevalent near Beijing and further south in Tianjin. Larvae of two species of apparently parasitic beetle, Tenerus Laporte (Coleoptera: Cleridae) species and Xenoglena quadrisignata Mannerheim (Coleoptera: Trogossitidae), were also recovered attacking overwintering EAB in Liaoning Province, with Tenerus species being a dominant mortality agent (~13%). Our findings support the need to consider the geographic origin of insect natural enemies for EAB biocontrol, as well as an expanded foreign exploration for EAB natural enemies throughout its native range in Asia.

scholarly journals Effects of temperature on development, reproduction and size of Trichogramma achaeae: implications for biological control

2020 ◽  
Author(s):  
Long Chen ◽  
Jesper Givskov Sorensen ◽  
Annie Enkegaard
Keyword(s):  
Biological Control ◽  
Development Time ◽  
Thermal Conditions ◽  
Egg Parasitoid ◽  
Wing Size ◽  
Control Efficacy ◽  
Thermal Biology ◽  
Female Longevity ◽  
Trichogramma Achaeae ◽  
Effects Of Temperature

The performance of biological control agents (BCAs) in outdoor crops is strongly regulated by ambient temperature. Understanding the thermal biology of BCAs and manipulating their thermal performance could improve biological control efficacy. In this study, the effects of temperature on several life history parameters (longevity, fecundity, development time, wing size) of the recently commercialised egg parasitoid Trichogramma achaeae Nagaraja & Nagarkatti (Hymenoptera: Trichogrammatidae) was examined. First, parasitoids were reared at 23 °C and tested in the laboratory at four constant temperatures (15, 20, 25 and 30 °C). Results demonstrated that temperature significantly altered all above parameters. Second, developmental acclimation was applied to manipulate the laboratory performance. Parasitoids were allowed to develop at either of the above four temperatures and their performance were compared at 23 °C. Results showed that developmental acclimation had a significant impact on fecundity, development time and wing size but not on female longevity. Our results have implications for improving the performance of T. achaeae in mass production and for its application for biological control under different thermal conditions.

scholarly journals Photoperiodic modulation of diapause induction and termination in Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), an egg parasitoid of the invasive emerald ash borer

2019 ◽  
Vol 138 ◽  
pp. 104047 ◽  
Author(s):  
Toby R. Petrice ◽  
Deborah L. Miller ◽  
Leah S. Bauer ◽  
Therese M. Poland ◽  
Forrest W. Ravlin
Keyword(s):  
Emerald Ash Borer ◽  
Egg Parasitoid ◽  
Diapause Induction
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