摘要： 伪钝绥螨在11.23～36℃的温度范围内均能正常生长,但在30℃以上产卵量降低一半.相对湿度70%以上是其生育的适宜湿度,低湿度下卵的孵化率低,是影响成活率的主要原因.但低湿度并不影响卵的胚胎发育,而是阻碍幼螨的孵化,只要在卵期的最后7～10小时有适宜的湿度,仍有很高的孵化率.该螨取食山楂叶螨或朱砂叶螨均能正常生育,取食苹果、桃的花粉,其产卵量和发育速度与取食叶螨无显著差异.根据伪钝绥螨对环境的要求及我国北方苹果园的生态条件,作者认为有可能在渤海湾一带的苹果产区定居,并能对害螨发挥较好的控制作用.

关键词: 伪钝绥螨, 环境条件, 适应性, 中国北方, 生物防治

Abstract: Some biological and ecological characteristics of Amblyseius fallacis were studied. The temperature range of 11.23-36℃ is suitable to its development but the temperature above 30℃ could reduce a half of its fecundity. Humidity above 70% RH satisfy its development and reproduction. Low egg hatch rate at low humidity is a main reason affecting the survival rate of A, f allacis, but the experiment indicated that low humidity obstructed the hatch of larva other than development of embryo. High hatch rate could reach if suitable humidity was given in last 7-10 hours of egg stage.Both Tetranychus viennensis and T.cinnabarinus were preferably preyed on and could satisfy the requirement of A, f allacis development and reproduction. The oviposition quality and developmental speech of A, f allacis feeding on pollen of apple and peach were not significantly different from that of feeding on prey mites. It is considered that A, f allacis may settle in apple production area of the Bohai sea bay according to its requirements for the environment and ecological conditions of apple orchards of northern part in China.

Key words: Amblyseius fallacis, Environmental condition, Adaptability Northern part of China, Biological control