锈病是梨树主要病害之一,在全国梨产区普遍发生。湖北省安陆县由于栽植桧柏很多,几乎所有梨树均染锈病,过去每年喷波尔多液和石硫合剂三、四次仍不能控制其危害,严重的成片整株发病,对梨树生产影响极大。1984年我们用粉锈宁(西德拜耳公司生产,25%粉剂)在60亩梨园进行防治锈病试验,试验区有:(1)3月17日喷粉锈宁1500倍液;(2)3月17日喷2500倍液后,4月13 Rust disease is one of the main diseases of pear, Pear production in the country generally. Anlu County, Hubei Province, due to the planting of cypress a lot, almost all pear trees are infected with rust, past annual Bordeaux mixture and lime sulfur mixture three or four times still can not control the harm, a serious disease into the whole plant, pear production Great impact. Rust rust test was conducted in 60 acres of pear orchards with triadimefon (West Bayer AG, 25% powder) in 1984 with the following test areas: (1) spraying 1500 times of rust on March 17; (2) spraying on March 17 2500 times after the liquid, April 13