我场有柑园一千另七十七亩,柑树四万九千八百五十三株,红蜘蛛、锈壁虱、潜叶蛾等多世代害虫常年重叠发生为害严重,1982年虫害率估3.7％。介壳虫种类也多,往年这些螨类、蚧类较难防治,今年采用40％水胺硫磷乳剂1500—7000倍液,从6～9月喷药4次,防治柑桔锈壁虱,红蜘蛛有显著效果。防治效果97—99％。历年夏季高温使用石硫合剂防治锈壁虱,常引起药害,严重柑果受害率13.2％,今年使用水胺硫磷较安全,没有药害。 My field has a thousand and another thousand or seventeen acres of citrus, citrus forty-nine thousand eight hundred and thirty-three strains of red spider, rust ticks, leaf moths and other generations of pests perennial overlap serious harm to the pest rate in 1982 Estimated 3.7%. Scale insects are also many species in recent years, these mites, scale class more difficult to prevent this year with 40% aqueous ammonia and Sulfur emulsion 1500-7000 times from 6 to September spraying 4 times to control citrus rust ticks, red Spiders have a significant effect. Control effect of 97-99%. Over the years the use of lime sulfur in summer to prevent rust ticks, often cause injury, the serious damage rate of citrus fruit 13.2%, this year the use of methamidophos safer, no phytosanitary.