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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
Publication No. 87, No. 5 has published Comrade Zhou Yaoxun tricyclazole prevention and treatment of a head blast, he proposed the optimal medication period of 10% heading. We think it seems that the control period should also be advanced to the end of booting period (8 stages of panicle differentiation). In 1985 I station for tricyclazole prevention and treatment of panicle blast test, the test sub-district (tricyclazole application in the 8, blasting in the break Shi Shi) and the secondary zone (breach and heading stage). The results showed that in the primary zone, 25% of the relative control efficiency was 90.6% per acre for 75% tricyclazole (Japanese-made product) and 20% for tricyclazole WP (85% Paulang EC 100 ml per mu effect control 75.0%. Secondary zone: 75% tricyclazole 20 grams per mu with control effect 85.3%, 20% tricyclic azole with 1.5 two anti