苹果红蜘蛛药效试验研究

为了使果树正常生长发育,获得高产优质的果品,1986～1988年,我们在景泰条山农场设点,对苹果红蜘蛛的防治进行了大量的调查研究。根据苹果红蜘蛛的越冬螨口密度、该场用药历史,选用粘土柴油乳剂、石硫合剂、柴油乳剂等多种药物喷杀越冬卵,以常规防治为对照,筛选出具有杀虫效果好,不产生抗药性,对人畜安全,又不污染环境,成本低等优点的粘土柴油乳剂和石硫合剂为较理想的药物。两年来,该场800余亩果树,均用粘土柴油乳剂喷布,枝干上每平方厘米卵的粒数由原来的303.8粒下降到1.7～21.8粒,基本控制了该虫的发生发展和为害。

Studies on Pesticide Effect for Apple Red Spiders

In order to make fruit trees grow and develop normally and gain fruits of high yield and good quality, we set up a series of experiments for controlling apple red spiders on Taoshan Farm of Jingtai from 1987 to 1988. Based on the basic number of hibernation and the history of using pesticides, the clay-diesel oil emulsion, lime sulfur and diesel oil emulsion and so on were chosen as spraying to kill worm eggs. The clay-diesel oil emulsion and lime sulfur were selected asidealer controlling poisons with advantages of good effect, not inducing resistance to poisons, safe for human and livestock, not polluting environment and lower cost etc. The orchards of eight hundred mu were sprayed with clay-diesel oil emulsion for two years, and the worm intensity per square centimeter on branches and trunks decreased from three hundred and three point eight to one point seven—twenty one point eight.