75% 肟菌酯窑戊唑醇水分散粒剂防治黄瓜炭疽病药效试验

为明确75％肟菌酯·戊唑醇水分散粒剂对黄瓜植株的安全性,采用浸种及茎叶喷雾处理的方法测定其对不同生长时期黄瓜植株的影响,并在田间进行防治炭疽病的药效试验,综合评价肟菌酯·戊唑醇对黄瓜炭疽病的防治效果.结果表明,肟菌酯·戊唑醇浸种对炭疽病的发生具有较好的预防效果,对黄瓜株高和根长的抑制率、茎周增长率与已唑醇相比均较低;肟菌酯·戊唑醇60 mg/L处理在幼苗期和开花期施药对黄瓜株高的抑制率分别为16.24％和4.66％,显著低于已唑醇;肟菌酯·戊唑醇对黄瓜炭疽病的田间防治效果为72.93％～84.97％,与己唑醇防效相当,明显高于阿米西达.说明肟菌酯·戊唑醇对黄瓜生长安全且对炭疽病有较好的防治效果,是防治炭疽病的较好轮换药剂.

Application of trifloxystrobin and tebuconazole 75% wg in controlling against Colletotrichum lagenarium

Cucumber seed and seedling was soaked and sprayed respectively to evaluate the safety of trifloxystrobin and tebuconazole to cucumber, while field trial was also conducted to evaluate the control efficacy of trifloxystrobin and tebuconazole to Colletotrichum lagenarium. Results shoued that trifloxystrobin and tebuconazole had good control effect on Colletotrichum lagenarium, while plant height,root length and increase rate of stem diameter were significant lower than that of hexaconazole after seed-soaking treatment. Rate of plant height inhibition were 16.24% and 4.66% at cucumber seedling and florescence period after spraying treatment with concentration of 60mg/L, which were significant lower than that of hexaconazole. The control efficacies were 72.93%~84.97% in field trial, which was as good as that of hexaconazole but was higher than that of amistar. The study showed that trifloxystrobin and tebuconazole was safe to cucumber and efficacious to Colletotrichum lagenarium. It can be used as an alternative chemical to control Colletotrichum lagenarium.