Department of Entomology, Louisiana State University AgCenter, Baton Rouge, LA.
College of Agriculture, Communities, and the Environment, Kentucky State University, Frankfort, KY.
J Econ Entomol. 2020 Dec 9;113(6):2732-2738. doi: 10.1093/jee/toaa191.
Southern green stink bug, Nezara viridula (L.) and redbanded stink bug, Piezodorus guildinii (Westwood) are two of the most important seed sucking pests affecting Louisiana soybean production and rice stink bug, Oebalus pugnax (F.) is an important late season pest in Louisiana rice. Exploration of chemicals that exhibit attraction or repellent activities toward major stink bug species would be beneficial in developing push-pull strategies. Spinosad is a commercially available natural insecticide that may have arrestant, attractant, or phagostimulant properties against stink bugs. To test this, a series of laboratory experiments were conducted to investigate the tactile, olfactory, and feeding responses of these stink bugs toward two commercial spinosad products (Entrust and Tracer) and technical grade spinosad. In tactile assays, female and male redbanded stink bug were arrested by Entrust, Tracer, and technical grade spinosad, whereas only rice stink bug and southern green stink bug males were arrested by Entrust. Y-tube assays revealed no attraction to any of the products by either male or female rice stink bug, redbanded stink bug, or southern green stink bug. In paired (treated or untreated soybean seed) feeding preference experiments, southern green stink bug showed no preference for any treatment, whereas redbanded stink bug fed more on Entrust- and Tracer-treated seed. From these results, spinosad appears to have an arrestant and phagostimulant effect on redbanded stink bug in the laboratory.
南方绿椿象和红肩绿椿象是两种对路易斯安那州大豆生产影响最大的吸食种子害虫，稻褐蝽象是路易斯安那州水稻的重要晚季害虫。探索对主要椿象物种具有吸引力或驱避活性的化学物质，将有利于开发推拉策略。多杀菌素是一种商业上可获得的天然杀虫剂，它可能对椿象具有麻醉、引诱或取食刺激特性。为了验证这一点，进行了一系列实验室实验，以研究这些椿象对两种商业多杀菌素产品（Entrust 和 Tracer）和技术级多杀菌素的触觉、嗅觉和取食反应。在触觉测定中，雌性和雄性红肩绿椿象被 Entrust、Tracer 和技术级多杀菌素所阻止，而只有雄性稻褐蝽象和南方绿椿象被 Entrust 所阻止。Y 型管试验表明，雄性或雌性稻褐蝽象、红肩绿椿象或南方绿椿象对任何一种产品都没有吸引力。在配对（处理或未处理的大豆种子）取食偏好实验中，南方绿椿象对任何处理都没有偏好，而红肩绿椿象则更喜欢取食 Entrust 和 Tracer 处理过的种子。根据这些结果，多杀菌素在实验室中对红肩绿椿象似乎具有麻醉和取食刺激作用。
