摘要
实验证明，中生菌素２００倍液对水稻白叶枯病的防治效果达８９％，相当于化学农药１０％叶枯净１５０倍和２５％川化０１８５００倍药液处理。大田最佳施药时机为病株率５～１０％的发病初期，连续防治２～３次可有效控制病情，千粒重提高１７～１８．７％。秧田于３～４叶期和移栽前５天各喷中生菌素１５０倍液一次，可推迟大田发病期４５天，防效高达９０．５７％。同时节省防治成本７０～８０％。
ield
experiments conducted in Henan Provincc resulted in a 89% control of
Xanthomonasoxyzea,one of the three most serious diseases of rice in China,with
Zhongshengmycin.Thisantibiotic is a product of Streptomyces lavendulae var.hainanensis nov.
var.and was diluted 200times in the application against the disease.The control result was
better than two commonlyused chemical bactericides against the disease. The optimal time for
applyingZhongshengmycin in the field was determined as early stages of the disease when
5-10% of thecrops were infectcd.A continuous application of 2-3 times gavc effective control of
the diseaseand an increase in the weight per thousand grain by 17-18.7%。One application of
a 150 timesdilution of the antibiotic in the seedling bed at 3-4 leavcs stage and once before
transplantingeffectively postponed the occurrence of the disease in rice paddies by 45 days.A
90.57% controlwas obtained with this technique with a 70.80% reduction of the control cost.
基金
国家"八五"攻关项目
关键词
中生菌素
水稻
白叶枯病
防治
Zhongshengmycin Streptomyces lavendulae var.hainanensis Xanthomonas ovzea
plant disease biocontrol
