Overwintering of the aphid parasitoids Aphelinus asychis and A. albipodus (Hymenoptera: Aphelinidae) under natural conditions in Kyoto, Japan

Tatsumi, Eriko; Takada, Hajimu

doi:10.1303/aez.2006.139

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Cited by 5 publications

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How do outside-hosts-overwintering parasitoids, at the adult stage, cope with cold?

D'Ottavio,

Labrie,

Lucas

2024

Journal of Thermal Biology

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How do outside-hosts-overwintering parasitoids, at the adult stage, cope with cold?

D'Ottavio,

Labrie,

Lucas

2024

Journal of Thermal Biology

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Cold tolerance and overwintering survival of Aphelinus certus (Hymenoptera: Aphelinidae), a parasitoid of the soybean aphid (Hemiptera: Aphididae) in North America

Stenoien

Christianson

Welch

et al. 2023

Bull. Entomol. Res.

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Broad-spectrum insecticides are the main control measure of the invasive and economically damaging soybean aphid (Aphis glycines) in North America, although biological control by resident natural enemies can also greatly diminish population levels. One such natural enemy is the accidentally introduced Eurasian parasitoid Aphelinus certus (Hymenoptera: Aphelinidae), though its impact appears to be limited by low rates of parasitism early in the growing season. We tested the hypothesis that A. certus might experience high overwintering mortality. In the laboratory, we used thermocouple thermometry to measure the supercooling points of diapausing parasitoids and assessed parasitoid survival after exposure to ecologically relevant durations of low temperature. We found A. certus to be freeze-intolerant with a median supercooling point of −28°C. When exposed to temperatures of 0°C for up to 7 months, adults emerged only after exposures of at least 60 days and survival decreased with durations beyond 150 days. We also conducted in-field studies at sites from northern Minnesota to southern Iowa to determine if diapausing A. certus could overwinter above and below the snowpack. Survival was negatively correlated with increasing latitude and was greater for parasitoids placed on the ground than 1 meter off the ground, likely due to the warmer and stabler temperatures of the subnivean microclimate. Our results suggest that A. certus is capable of overwintering in the region inhabited by soybean aphid but may experience substantial mortality even under ideal conditions. Climate change is predicted to bring warmer, drier winters to the North American Midwest, with decreased depth and duration of snow cover, which may further reduce overwintering survival.

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Ecology of Aphid Parasitoids in Winter Wheat Habitats of the Southern Plains: How Latitude and Crop Diversity Influence Pest Management

Giles,

Elliott,

Royer

et al. 2024

Arthropod Management and Landscape Considerations in Large-Scale Agroecosystems

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Overwintering of the aphid parasitoids Aphelinus asychis and A. albipodus (Hymenoptera: Aphelinidae) under natural conditions in Kyoto, Japan

Cited by 5 publications

References 14 publications

How do outside-hosts-overwintering parasitoids, at the adult stage, cope with cold?

How do outside-hosts-overwintering parasitoids, at the adult stage, cope with cold?

Cold tolerance and overwintering survival of Aphelinus certus (Hymenoptera: Aphelinidae), a parasitoid of the soybean aphid (Hemiptera: Aphididae) in North America

Ecology of Aphid Parasitoids in Winter Wheat Habitats of the Southern Plains: How Latitude and Crop Diversity Influence Pest Management

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