摘要
1987～1989年进行了农抗120与常用化学杀菌剂防治西瓜枯萎病的药效对比,及不同使用期农抗120的防病效果试验,结果表明,全省多点用300倍农抗120,施药2次,防治西瓜枯萎病的效果平均为83.91±11.86％,比常用化学杀菌剂高23～43％,农抗120的防效与施药时期关系密切,两次灌根时间都应在发病之前,第一次施药时间:直播西瓜在4～5片真叶期,移栽西瓜在苗床期,右,据河南省120个县市,11万亩西瓜的防治示范结果,隔7～10天,进行第二次施药,病株率已控制在0～8％左平均防效为70～95％,每亩挽回西瓜损失200～400公斤。
During 1987 to 1989, field studies were conducted in Henan Province for the control of watermelon wilt with Agricultural Antibiotic 120 (Streptomvsis product), to compare its effect with 18 commonly used chemical fungicides. The results showed that Antibiotic 120 gave an average control effect of 83.9+11.86%, which was 23-43% higher than that of the other fungicides. It was found that the most effective method and timing of applying Antibiotic 120 were pouring its 100 ppm water solution onto the root two times before infestation of the disease. For direct sown watermelon, the first treatment was made when the plants had 4-5 leaves, and the second treatment at the same dose 7-10 days later. For transplanted watermelon, the two treatments were in seedling bed and during transplanting, respectively. This technique had been implemented in 7,333.3 ha of watermelon fields in 120 counties of Henan Province during 1987-1989. An average control effect of 70-90% was obtained.
关键词
西瓜
枯萎病
农抗120
防治
Agricultural Antibiotic 120 watermelon wilt fusarium oxysporum var.niveum
