甜叶菊斑枯病药剂防治试验研究

Studies on Fungicides Selction to Controlthe Leafspot of Stevia rebaudiana Bertoni

甜叶葡斑枯病是甜叶菊发生最普遍、危害最严重的病害。室内药剂筛选表明，７５％百菌清ＷＰ和５０％复方甲基托布津ＷＰ对病菌分生孢子萌发的抑制率最高。对病菌菌丝生长的抑制以５０％复方甲基托布津ＷＰ和５０％苯来特ＷＰ效果最好。田间防效试验以５０％复方甲基托布津和７５％百菌清效果最好，在１０００倍液时对斑枯病的校正防效分别达到９３．６％和８６．１％。

The leafspot disease of Stevia rebaudiana Bertoni in most popular and serious disease inits production. The fungicides selection in the laboratory showed that 75％ChlorothalonilWP and 50％Topsin-M WP had the highest inhibiting rate for pyconspore germination，and50％TopsinM WP and 50％Benlate WP had the best effect forinhibiting the pathogen hy-phae growth，However，field selection showed that 50％Topsin-M WP and 75％Chorothalonil WP were the best fungicides to control this disease，when diluted 1000 times inwater，their control effect reached 73．6％and 86．1％respectively.