학술논문

Reproductive Biology and Evidence of Diapause in the Cowpea Curculio (Coleoptera: Curculionidae)
Document Type
Academic Journal
Source
Journal of Economic Entomology. April, 2020, Vol. 113 Issue 2, p882, 5 p.
Subject
Mimosaceae -- Analysis
Legumes -- Analysis
Insect pests -- Analysis
Beans -- Analysis
Language
English
ISSN
0022-0493
Abstract
Chalcodermus aeneus Boheman (Coleoptera: Curculionidae) has been the most destructive insect pest of black-eyed peas or cowpeas, Vigna unguiculata L. (Fabales: Fabaceae), over the last century in the southeastern United States. The historical distribution of this semitropical pest suggests the likelihood that diapause plays a key role in the overwintering success in parts of the United States. However, this report is the first to document biological evidence for diapause in C. aeneus. Our study assessed larval emergence from cowpea pods in the summer to fall growing seasons, egg development in female adults over the first (summer) and second (fall) generations, and adult emergence from infested soil after the first and second generations. There was a clear reduction in larval emergence from summer to fall. Egg and follicle development in female C. aeneus dropped off dramatically by September of each year. There was an extended emergence pattern of weevil adults from the soil in the fall as compared to the summer generation. Any future regional management of cowpea curculio will have to take into account the ability of this insect to diapause, thereby increasing its capacity to overwinter in regions where the cowpea crop, a warm-season, semitropical plant, is terminated with winter freezing temperatures. Key words: Coleoptera, Curculionidae, reproduction, diapause
There are few published reports available regarding the reproductive biology of the cowpea curculio, Chalcodermus aeneus Boheman (Coleoptera: Curculionidae) (Ainslie 1910, Arant 1938, Hetrick 1947, Dupree and Beckham 1955, Daoust [...]