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san huan zuo fang zhi shui dao sui jing wen ji shu de shang que
Author(s): 
Pages: 52
Year: Issue:  4
Journal: Agrochemicals

Keyword:  三环唑相对防效稻瘟灵防治时期可湿性粉剂幼穗分化穗瘟齐穗期水稻穗颈瘟试验;
Abstract: <正> 贵刊87年第5期曾发表周耀勋同志关于三环唑防治穗瘟一文,他提出最佳用药时期为抽穗10%。我们认为防治时期似乎还应该提前到孕穗末期(幼穗分化8期)。1985年我站进行三环唑防治穗瘟试验,试验分一次区(三环唑在8期施药,稻瘟灵于破口施)和二次区(破口和齐穗期施)。结果表明:一次区,75%三环唑(日本产)每亩25克相对防效90.6%,20%三环唑可湿性粉剂每亩2两(浙江温州产)防效85.0%,40%稻瘟灵乳油每亩100毫升防效75.0%。二次区:75%三环唑每次亩用20克防效85.3%,20%三环唑亩用1.5两防
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