CAJ | 학술논문

[目的]为了筛选出能够显著降低稻曲病发病率和病情指数的高效药剂，以及探寻防治适期。[方法]采用菌丝生长测定法测定药剂对稻曲病菌的生长抑制活性，求出不同药剂抑制菌丝生长的有效中浓度 EC50；同时选取17种药剂进行喷药防治，评估其防效及对水稻产量等性状的影响。[结果]氟环唑、苯醚甲环唑、丙环唑和咪酰胺对稻曲病菌菌丝生长的抑制活性较高，EC50分别为0.04、0.07、0.12和0.11μg/ml；田间试验结果表明，纹曲宁、苯醚甲环唑、咪鲜胺、丙环唑、氟环唑等化学制剂及其复配制剂对稻曲病均有70%或以上的防效。[结论]所用17种药剂在水稻剑叶完全展开期进行喷雾防治对水稻稻曲病都有一定的防治效果，对水稻叶片和稻粒均无药害。
[목적]위료사선출능구현저강저도곡병발병솔화병정지수적고효약제，이급탐심방치괄기。[방법]채용균사생장측정법측정약제대도곡병균적생장억제활성，구출불동약제억제균사생장적유효중농도 EC50；동시선취17충약제진행분약방치，평고기방효급대수도산량등성상적영향。[결과]불배서、분미갑배서、병배서화미선알대도곡병균균사생장적억제활성교고，EC50분별위0.04、0.07、0.12화0.11μg/ml；전간시험결과표명，문곡저、분미갑배서、미선알、병배서、불배서등화학제제급기복배제제대도곡병균유70%혹이상적방효。[결론]소용17충약제재수도검협완전전개기진행분무방치대수도도곡병도유일정적방치효과，대수도협편화도립균무약해。
Objective] This study aims to screen for the high effective fungicides which could significantly decrease the disease incidence and disease index of rice false smut. [Method] The inhibitory activities of the fungicide against mycelial growth of Ustilaginoidea virens were measured to in vitro evaluate the EC50 values. And 17 fungicides were sprayed to evaluate the efficacy and effect of the fungicides tested in the field trials on the rice characters. [Result] The results showed that epoxicona-zole, difenoconazole, propiconazole and procloraz exhibited high inhibitory activity against mycelial growth of Ustilaginoidea virens with the EC50 values 0.04, 0.07, 0.12 and 0.11 μg/ml, respectively. The results of field trials showed that the efficacy of Wen-quning, and fungicides such as difenoconazole, prochloraz, propiconazole, epoxi-conazole and their mixtures in control ing rice false smut were al 70% or more. [Conclusion] The 17 tested fungicides behaved efficacy in control ing rice false smut and did not cause drug injury on leaves and grains of rice plants, sprayed when flag leaves of rice ful y expanded.