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山楂红蜘蛛是为害果树的主要害螨之一,发生普遍,为害较重。生产上长期使用高效杀螨或杀虫杀螨剂,虽然也有较好的防效,但使红蜘蛛抗性明显增加。近年来,为了减少抗药性,试用了固体石硫合剂,获得了较好的防治效果。但是,固体石硫合剂因不能与其它农药混合而增加了喷药次数,从而加大了防治成本。悬浮硫是无机性农药,性质稳定,不仅可与其它农药混合使用,而且不杀伤天敌。为明确该药对山楂红蜘蛛的防治效果,我们于1991年进行了田间防治试验。现将试验结果简结如下: 一、供试药剂
Hawthorn spider mite damage is one of the main fruit pests mite, occurs generally, the damage heavier. Long-term production of high efficiency to kill mites or insecticide acaricide, although there is a good control effect, but the spider mite resistance increased significantly. In recent years, in order to reduce drug resistance, the trial of solid lime sulfur mixture, get a better control effect. However, the solid lime sulfur mixture can not be mixed with other pesticides to increase the number of spraying, thereby increasing the cost of prevention and treatment. Suspended sulfur is an inorganic pesticide, stable in nature, not only mixed with other pesticides, but also does not kill natural enemies. In order to clarify the control effect of the drug on the hawthorn spider mite, we carried out field control trials in 1991. The test results are summarized as follows: First, the test agent