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琯溪蜜柚常会遭到红蜡蚧为害,轻者落叶,重者枯枝。单一使用有机杀虫剂类农药,防效不佳,石碱(石灰、纯碱)制剂防效虽好,但易产生大量落叶。1990年10月我们应用合成洗衣粉柴油制剂与马拉硫磷混合对本场5年生琯溪蜜柚采后进行田间试验。方法是:将合成洗衣粉50克,溶于1公斤温水中,倒入零号柴油150克充分搅拌待药液成橙黄色时,加入800倍马拉硫磷,并兑水50公斤。施药前一天调查虫口基数,以3株树设一处理,用单管型高压式喷雾器喷雾。针对红蜡蚧群集枝干为害特点,每株树从东南西北中
Guanxi honey pomelo often suffer red wax scale damage, light leaves, heavy dead branches. Single use of organic insecticides pesticides, poor control efficiency, prevention and control of stone alkali (lime, soda ash) preparations are good, but easy to produce a large number of leaves. In October 1990, we used a synthetic detergent diesel oil mixture with malathion to conduct a field experiment on the 5-year-old Baishui honey pomelo after harvest. Method is: 50 grams of synthetic detergent, dissolved in 1 kg of warm water, pour zero 150 grams of diesel oil to be fully stirred when the liquid into the orange-yellow, adding 800 times malathion and watered 50 kg. One day before spraying, the number of insect population was investigated. Three trees were treated and sprayed with a single-tube high-pressure sprayer. For the red wax scale cluster branch damage characteristics, each tree from southeast northwest