Pistachio Safety Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
Department of Crop Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
J Econ Entomol. 2019 Mar 21;112(2):571-576. doi: 10.1093/jee/toy424.
Laboratory studies were conducted to determine the effect of two prey species, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Aphalaridae) and Aphis gossypii Glover (Hemiptera: Aphididae) on the biology, reproduction, and food consumption indices of Coccinella septempunctata L. (Coleoptera: Coccinellidae). Both species of prey were readily consumed by C. septempunctata larvae and adults. The predator was able to successfully utilize the psylla prey for larval development, but failed to lay eggs when fed this prey. However, A. gossypii fully supported both development and reproduction of C. septempunctata. Dry mass of ingested food was similar on both diets for each larval instar. However, the dry mass gained during each stadium for C. septempunctata was significantly greater with A. gossypii prey. The aphid diet was superior to the psylla diet in terms of food conversion efficiency as larvae consumed aphids more efficiently than psyllas, regardless of the higher consumption index on the psylla prey. Our results confirm that the study of prey suitability for larvae and adult stages of predatory lady beetles should be studied separately.
实验室研究旨在确定两种猎物物种，即 Agonoscena pistaciae Burckhardt 和 Lauterer（半翅目： Aphalaridae）和 Aphis gossypii Glover（半翅目： Aphididae）对七星瓢虫（鞘翅目：瓢虫科）的生物学、繁殖和食物消耗指数的影响。这两种猎物都能被七星瓢虫幼虫和成虫轻易地食用。捕食者能够成功地利用粉虱猎物来进行幼虫发育，但当喂食这种猎物时，它无法产卵。然而，A. gossypii 完全支持了七星瓢虫的发育和繁殖。对于每个幼虫龄期，两种饮食的摄入食物的干质量相似。然而，对于七星瓢虫的每个龄期，用蚜虫作为食物时，获得的干质量明显大于用粉虱作为食物时。就幼虫而言，无论在粉虱猎物上的消耗指数更高，蚜虫饮食在食物转化率方面都优于粉虱饮食，因为蚜虫比粉虱更有效地被幼虫消耗。我们的研究结果证实，对于捕食性瓢虫幼虫和成虫阶段的猎物适宜性研究，应分别进行。
