Yang Liu, Hu Xing Ping, Golec Julian R, Zeng Xinnian
Department of Entomology and Plant Pathology, Auburn University, Auburn, AL.
College of Agriculture, South China Agricultural University, Guangzhou, China.
J Econ Entomol. 2018 Sep 26;111(5):2217-2224. doi: 10.1093/jee/toy178.
The kudzu bug, Megacopta cribraria (F.) (Heteroptera: Plataspidae), is an invasive pest of soybeans in the southeastern United States. Two greenhouse choice assays evaluated crop species and growth stage-specific orientation preference of kudzu bug adults to six different legume species (Fabales: Fabaceae) at four plant growth stages (V2, V4, R1, and R5). Adults had differential orientation to both legume species and plant growth stages tested. Adults preferred the R1 stage of soybean (Glycine max (L.) Merrill) and lima bean (Phaseolus lunatus (L.)), but preferred various growth stages of the other legumes tested. Given their respective attractive growth stages, adults significantly preferred lima bean (47.8%) to soybean (21.9%) and kidney bean (Phaseolus vulgaris (L.), 19.2%), and preferred mung bean (Vigna radiata (L.) Wilczek, 4.2%), black-eyed pea (Vigna unguiculata subsp. unguiculata (L.) Walp, 4.7%), and green bean (Phaseolus vulgaris (L.), 2.7%) the least. In no-choice assays, females deposited a similar number of eggs on each legume species, except for green bean and kidney bean, on which they deposited the fewest eggs. Eggs laid by females feeding on soybean (67.9%), lima bean (58.1%), and mung bean (42.6%) had significantly greater hatch rates than eggs laid by females feeding on the other legume species. No-choice assays also showed that nymphs completed development to adults on soybean, lima bean, and mung bean; yet, survival was greatest on soybean. Results show that females fed and oviposited on all of the legume species tested; however, plant species significantly affected egg hatch rates and nymphal survival.
葛藤蝽（Megacopta cribraria (F.)，半翅目：盾蝽科）是美国东南部大豆的一种入侵性害虫。两项温室选择性试验评估了葛藤蝽成虫在四个植物生长阶段（V2、V4、R1和R5）对六种不同豆科植物（豆目：豆科）的作物种类和生长阶段特异性定向偏好。成虫对所测试的豆科植物种类和植物生长阶段均有不同的定向反应。成虫更喜欢大豆（Glycine max (L.) Merrill）和利马豆（Phaseolus lunatus (L.)）的R1阶段，但更喜欢所测试的其他豆科植物的不同生长阶段。鉴于它们各自具有吸引力的生长阶段，成虫显著更喜欢利马豆（47.8%）而非大豆（21.9%）和菜豆（Phaseolus vulgaris (L.)，19.2%），最不喜欢绿豆（Vigna radiata (L.) Wilczek，4.2%）、黑眼豆（Vigna unguiculata subsp. unguiculata (L.) Walp，4.7%）和四季豆（Phaseolus vulgaris (L.)，2.7%）。在无选择试验中，雌性在每种豆科植物上产下的卵数量相似，但在四季豆和菜豆上产下的卵最少。以大豆（67.9%）、利马豆（58.1%）和绿豆（42.6%）为食的雌性所产的卵孵化率显著高于以其他豆科植物为食的雌性所产的卵。无选择试验还表明，若虫在大豆、利马豆和绿豆上发育为成虫；然而，在大豆上的存活率最高。结果表明，雌性在所有测试的豆科植物上取食和产卵；然而，植物种类显著影响卵的孵化率和若虫的存活率。
