农药增效助剂“激健”在小麦条锈病防治中的应用效果

Pesticide Synergist ‘Jijian': Application Effect on Wheat Stripe Rust

为探明"激健"农药减量增效助剂在小麦条锈病防治中的应用效果,采用测报调查、随机区组设计和统计分析方法,开展了三唑酮和丙环唑添加"激健"防治小麦条锈病田间药效试验。结果表明,在条锈病流行期,施用15%三唑酮WP 1200 g/hm^2或25%丙环唑EC 600 mL/hm^2 2次,药后7天防效达93%以上,药后19天防效达100%;添加"激健"减少用量30%,即15%三唑酮WP 840 g/hm^2+"激健"225 g/hm^2或25%丙环唑EC 420 mL/hm^2+"激健"225 g/hm^2,药后7天防效分别为89.4%和91.7%,药后19天,防效达99.8%~100%;添加"激健"减少用量40%~50%,即15%三唑酮WP 720~600 g/hm^2+"激健"225 g/hm^2或25%丙环唑EC 360~300 mL/hm^2+"激健"225 g/hm^2,药后7天防效在78.0%以上,药后19天防效达97.7%~99.8%。2种药剂单用和添加"激健"减少用量30%,药后7天防效之间差异不显著,但均极显著高于添加"激健"减少用量40%~50%,但药后19天各处理间防效差异均不显著。若发病较轻,使用"激健"可以减少农药用量50%,即15%三唑酮WP 600 g/hm^2+"激健"225 g/hm^2,25%丙环唑EC 300 mL/hm^2+"激健"225 g/hm^2,从而有利于减少农药使用量和农残污染,节约防治成本。

The paper aims to clarify the application effect of pesticide decrement synergist ＇Jijian＇ on wheat stripe rust. The authors carried out field efficacy tests of triadimefon WP and propiconazole EC with addition of ＇Jijian＇ on controlling wheat stripe rust, by using the methods of forecasting, randomized block design and statistical analysis. The results showed that： during the epidemic period of stripe rust, the control effects on the 7th day and the 19th day reached more than 93% and 100%, respectively, by the application of 15% triadimefon WP 1200 g/hm2 and 25% propiconazole EC 600 mL/hm2 respectively for 2 times; when 15% triadimefon WP 840 g/hm2＋ ＇Jijian＇ 225 g/hm2 or 25% propiconazole EC 420 mL/hm^2＋ ＇Jijian＇ 225 g/hm2 were applied （＇Jijian＇ could reduce the dosage by 30% of the two pesticides）, the control effect on the 7th day was 89.4% and 91.7%, respectively, while the control effect on the 19＇h day was 99.8%-100%; when 15% triadimefon WP 720- 600 g/hm2＋ ＇Jijian＇ 225 g/hm2 or 25% propiconazole EC 360-300 mL/hm% ＇Jijian＇ 225 g/hm2 were applied （＇Jijian＇ could reduce the dosage by 40%-50% of the two pesticides）, the control effect on the 7th day reached more than 78.0%, while the control effect on the 19th day was 97.7%-99.8%. There was no significant difference on the 7~ day between the two pesticides used alone and adding ＇Jijian＇ to reduce the dosage by 30% dosage, but both had significantly higher effect than that adding ＇Jijian＇ to reduce the dosage by 40%- 50%. There was no significant difference of the control effect on 19＇h day among different treatments. These indicate that if the disease is lighter, the dosage of the pesticides can be reduced to 50%, that is to say, 15% triadimefon WP 600 g/hm^2＇Jijian＇ 225 g/hm^2 and 25% propiconazole EC 300 mL/hm^2＇Jijian＇ 225 g/hm2, in order to reduce pesticide usage and pesticide residue pollution, and cut the control cost.