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桃树桃粉蚜在湖北省于5月中、下旬,桃树结果之时大发生。以无翅蚜和若蚜密集在嫩梢和叶片上吮吸汁液,被害桃叶苍白卷缩,以致大量脱落,严重影响桃果产量及花芽形成,并大大削弱树势。1983年5月孝感地区农科所桃园桃粉蚜大发生,造成桃果大量脱落,减产65%左右。由于桃粉蚜分泌蜡粉,所以影响化学农药的防治效果。为了探索对粉蚜的防治方法,我们用乐果加洗衣粉按比例配好,进行防治试验,对照用敌杀死,其方法是:40%乐果2,000倍加0.2%的洗衣粉用手摇喷雾器喷雾,用3,000倍敌杀死喷雾作对照。试验结果:施药24小时后防效达85%,48小时后达100%。20天后桃树上仍无蚜虫。
Peach peach aphid in Hubei Province in mid-May, late, peach tree results occur. In the absence of winged aphids and aphids dense in the tender shoots and leaves sucking juice, peach pale leaves contracted, resulting in a large number of shedding, seriously affecting peach fruit yield and flower bud formation, and greatly weaken the tree vigor. In 1983 May Xiaogan region Peach Garden peach aphid occurred, resulting in a large number of Peach off, cut about 65%. Peach aphid secrete wax, so the effect of chemical pesticides control. In order to explore the prevention and treatment of the powdery aphid, we use the dimethoate plus detergent in proportion to a good, for prevention and control tests, the control killed by the enemy, the method is: 40% dimethoate 2,000 times plus 0.2% detergent with a hand sprayer Spray, with 3,000 times enemy kill spray as control. Test results: Control effect reached 85% after 24 hours and reached 100% after 48 hours. There are still no aphids on peach trees after 20 days.