Agricultural Biotechnology Lab, Western Paraná State University, Cascavel, PR, Brazil.
Biology Department, Federal University of Technology/UTFPR, Santa Helena, PR, 85892000, Brazil.
Exp Appl Acarol. 2020 Jun;81(2):215-222. doi: 10.1007/s10493-020-00497-z. Epub 2020 May 6.
The poultry red mite (PRM), Dermanyssus gallinae, is an ectoparasite of great importance related to poultry farms worldwide. Problems associated with its control have led to the search for alternative treatments, especially using inert dust, which has recently been introduced into liquid formulations. Therefore, the objective of this work was to evaluate the acaricidal activity of a liquid diatomaceous earth (DE) preparation in the laboratory and its association with mechanical cleaning (brushing) in the field. In the laboratory it was first determined that a concentration of 10% DE would be necessary for field applications. The field experiment was conducted in a commercial poultry house. The 10% DE liquid preparation was administered in three applications and associated to mechanical cleaning. Then, 42 days after the first DE application, a population reduction of 94.7% was observed in relation to the initial population of mites. These results confirm the efficiency of DE applications in association with mechanical cleaning already adopted in poultry houses as an alternative for the control of D. gallinae, which can also contribute to avoiding mite resistance to chemical acaricides.
家禽红螨（PRM），即鸡皮刺螨，是一种与世界各地家禽养殖场密切相关的重要外寄生虫。由于其控制问题，人们一直在寻找替代疗法，特别是最近引入的惰性粉尘的液体制剂。因此，这项工作的目的是评估实验室中一种液态硅藻土（DE）制剂的杀螨活性及其与现场机械清洁（刷拭）的联合作用。在实验室中，首先确定 10%的 DE 浓度将适用于田间应用。田间试验在一个商业家禽养殖场进行。10%的 DE 液体制剂进行了三次施药，并与机械清洁相结合。然后，在第一次 DE 应用后 42 天，与螨虫初始种群相比，观察到种群减少了 94.7%。这些结果证实了 DE 制剂与家禽养殖场中已经采用的机械清洁相结合的有效性，这也是控制鸡皮刺螨的一种替代方法，也有助于避免螨虫对化学杀螨剂产生抗药性。
