Amblyseius largoensis in controlling red palm mite under semi-field conditions

Abstract: The objective of this work was to evaluate the efficiency of two Amblyseius largoensis (Acari: Phytoseiidae) populations in controlling Raoiella indica (Acari: Tenuipalpidae). The treatments were: release of A. largoensis from the island of La Réunion; release of A. largoensis from the state of Roraima, Brazil; and a control, without predator release. Initially, 20 predators were released per plant; three other releases were done at a rate of ten adults per plant, at 46, 135, and 156 days after the first release. The population densities were estimated every 20 days, during six months. Both A. largoensis populations evaluated are not sufficiently efficient to control the R. indica population.

摘要：本研究旨在评估两个拉戈钝绥螨（Amblyseius largoensis，蜱螨目：植绥螨科）种群对印度拉奥螨（Raoiella indica，蜱螨目：细须螨科）的防控效能。试验设置三组处理：释放留尼汪岛来源的拉戈钝绥螨、释放巴西罗赖马州来源的拉戈钝绥螨，以及不释放捕食螨的空白对照组。试验初始阶段，每株植物释放20头捕食螨；随后在首次释放后的第46、135和156天，分别以每株10头成螨的密度进行三次补充释放。整个试验周期为六个月，每20天对种群密度进行一次估算。本次研究所评估的两个拉戈钝绥螨种群，均不足以有效控制印度拉奥螨的种群数量。