The Ecological Characteristics of the Winter Cherry Bug Acanthocoris sordidus (Hemiptera) and the Effects of Colony Formation on its Potential as an Insect Pest
2016
Kang, C.Y., Chungnam National University, Daejeon, Republic of Korea | Ryu, T.H., Chungnam National University, Daejeon, Republic of Korea | Kwon, H.R., Chungnam National University, Daejeon, Republic of KoreaChungnam National University, Daejeon, Republic of Korea | Yu, Y.M., Chungnam National University, Daejeon, Republic of Korea | Youn, Y.N., Chungnam National University, Daejeon, Republic of Korea
The winter cherry bug, Acanthocoris sordidus (Thunberg), is an insect pest hat damages plants from Solanaceae and Convolvulaceae. The developmental period from egg to adult averages 76 days at 25Celsius. Adult egg-laying occurred irregularly via spawning, averaging 195 (up to 468) eggs per individual on the abaxial leaf surface of the host plant. Results of linear regression indicated that the lower developmental threshold temperature was 13.9Celsius and the effective accumulated temperature was 526.3 DD. Data from a pepper field in 2015 indicated that overwintering adults first appeared during late June (daily average temperature = 25.7Celsius), reaching maximum density by early September. A choice test examining colonization preferences using a net cage and a Y-tube olfactometer revealed that females gravitated toward conspecifics (other females, males, or both), whereas males moved toward empty areas. Finally, we found that communal breeding results in a longer developmental period and higher eclosion rates than solitary breeding. Developmental periods and eclosion rates were also for colonies in a large space than for those in a small space. This outcome suggests that colonization effects on insect development are stronger in a smaller area.
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