Department of Acarology, Universidade do Vale do Taquari - UNIVATES, Avenida Avelino Tallini, Lajeado, Rio Grande do Sul, Brazil.
Department of Plant Health, Faculdade de Agronomia FAEM-UFPel, Caixa postal, CEP Capão do Leão, Rio Grande do Sul, Brazil.
J Econ Entomol. 2019 Sep 23;112(5):2103-2108. doi: 10.1093/jee/toz138.
Schizotetranychus oryzae Rossi de Simons attains pest level in rice crops. This study aimed to evaluate the biological features of Neoseiulus californicus (McGregor) feeding on S. oryzae on leaves of flooded rice. We also evaluated N. californicus behavior in response to S. oryzae and conspecific cues. Thirty-two eggs were individually placed in arenas on rice leaves and fed on S. oryzae for the biological test. Three cultivars were used to test the behavior of N. californicus in response to S. oryzae and conspecific cues. The intrinsic rate of increase (rm) of the predator feeding on S. oryzae was 0.21 female/female/day. Schizotetranychus oryzae was considered a suitable prey for N. californicus under laboratory conditions. The results obtained in behavioral tests showed that N. californicus preferred laying eggs on leaves uninfested by S. oryzae and it did not show oviposition preference in arenas with conspecific predator cues. This predator was found in all rice cultivation areas in the state of Rio Grande do Sul, Brazil. Neoseiulus californicus proved to be a control agent for S. oryzae.
稻瘦实蝇在水稻作物中达到害虫级别。本研究旨在评估加州新小绥螨（Neoseiulus californicus）取食水淹稻叶片上的稻瘦实蝇的生物学特征。我们还评估了加州新小绥螨对稻瘦实蝇和同种雄螨信息素的行为反应。将 32 个卵分别置于稻叶上的竞技场中，并取食稻瘦实蝇进行生物学测试。使用三种水稻品种来测试加州新小绥螨对稻瘦实蝇和同种雄螨信息素的行为反应。取食稻瘦实蝇的捕食者的内禀增长率（rm）为 0.21 雌/雌/天。在实验室条件下，稻瘦实蝇被认为是加州新小绥螨的适宜猎物。行为测试结果表明，加州新小绥螨更喜欢在未受稻瘦实蝇侵害的叶片上产卵，并且在有同种雄螨信息素的竞技场中没有表现出产卵偏好。这种捕食者在巴西南里奥格兰德州的所有水稻种植区都有发现。加州新小绥螨已被证明是稻瘦实蝇的有效控制剂。
