PDF(Pubmed)
Abstract：
Megalurothrips usitatus (Bagnall) (Thysanoptera: Thripidae) is an important pest in Vigna unguiculata (L.) Walp. Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae) is widely used for control of pest mites and insects worldwide. We evaluated its effect on M. usitatus when predators (N. barkeri) or insecticides (Spinetoram) were applied in the fields. Neoseiulus barkeri Hughes consumed 80% of M. usitatus prey offered within 6 h, and predation showed Type III functional response with prey density. The maximum consumption of N. barkeri was 27.29 ± 1.02 individuals per d per arena (1.5 cm diameter), while the optimal prey density for the predatory mite was 10.35 ± 0.68 individuals per d per arena (1.5 cm diameter). The developmental duration of N. barkeri fed with M. usitatus was significantly shorter than those fed with the dried fruit mite, Carpoglyphus lactis (L.) (Acari: Astigmata). In field trials, the efficiency of N. barkeri against M. usitatus was not significantly different from that of applications of the insecticide spinetoram. Biodiversity of other insects in treated fields was assessed, and there were 21 insect species in garden plots treated with N. barkeri releases. The total abundance (N), Shannon\'s diversity index (H), Pielou\'s evenness index (J) and Simpson\'s diversity index (D) of the garden plots treated with predatory mites were all significantly higher than that in the garden plots treated with spinetoram, where we found no species of predators or parasitoids and 7 herbivores. Our results show that N. barkeri is a potential means to control M. usitatus while preserving arthropod diversity at the level of treated gardens.
摘要：
巨藻蓟马（Bagnall）（Thysanoptera：Thripidae）是Vignaunguiculata的重要害虫（L.)沃尔普。Neoseiulusbarkeri（休斯）（Acari：Phytoseiidae）在世界范围内广泛用于控制害虫螨和昆虫。我们评估了捕食者对M.usitatus的影响(N.barkeri）或杀虫剂（Spinetoram）在田间应用。新树皮休斯在6小时内消耗了80％的usitatus猎物，捕食显示出具有猎物密度的III型功能反应。每个竞技场（直径1.5厘米）的最大消耗N.barkeri为27.29±1.02个个体/d，而捕食螨的最佳猎物密度为每个竞技场（直径1.5厘米）每d10.35±0.68个个体。用M.usitatus饲喂的N.barkeri的发育持续时间明显短于用干果螨饲喂的。乳酸字画（L.)(阿卡里:阿斯蒂玛塔)。在现场试验中，N.barkeri对M.usitatus的效率与杀虫剂spinetoram的应用没有显着差异。评估了处理过的田地中其他昆虫的生物多样性，园地中有21种昆虫，用N.barkeri释放物处理。总丰度（N），香农多样性指数(H)，捕食螨处理的园地的Pielou's均匀度指数（J）和Simpson's多样性指数（D）均显着高于spinetoram处理的园地。在那里我们没有发现食肉动物或寄生虫和7种食草动物。我们的结果表明，在处理过的花园水平上，N.barkeri是控制M.usitatus同时保持节肢动物多样性的潜在手段。
