论文部分内容阅读
用50%竹焦油乳油分别对水稻纹枯病、稻曲病和黄瓜白粉病进行田间药效试验表明,其防治效果为水稻纹枯病59.1%~74.1%,且使用浓度250、500倍的情况下,对其平均防效与5%井冈霉素WC200倍相当;防治稻曲病效果为56.3%~73.6%,250倍明显高于20%三唑酮EC1000的防治效果;防治黄瓜白粉病效果为63.6%~78.0%,在使用浓度250、500倍的情况下,对其平均防效优于0.3%多抗霉素AS 800倍处理。50%竹焦油用量以500倍为宜。因此,竹焦油EC对3种病原菌均有较好的防治效果是一种高防效低残留安全性好的新型广谱性杀菌剂。
A field efficacy test on rice sheath blight, rice false smut and cucumber powdery mildew with 50% bamboo tar emulsified oil showed that the control effect was 59.1% ~ 74.1% of rice sheath blight and the use concentration was 250,500 times , The average control effect was similar to that of 5% Jinggangmycin WC 200 times; the control effect of rice false smut was 56.3% -73.6%, 250 times higher than that of 20% triadimefon EC1000; the cucumber powdery mildew control effect was 63.6% -78.0%. The average control efficiency was better than that of 0.3% polyoxin AS 800 times at the concentration of 250 and 500 times. 50% bamboo tar amount to 500 times is appropriate. Therefore, bamboo tar EC has better control effect on all three pathogens, which is a new type of broad-spectrum bactericide with high safety and low residual safety.