几种杀菌剂对信阳茶树炭疽病的防治效果评价

Evaluation of Control Effects Several Fungicides on Tea Anthracnose in Xinyang

[目的]炭疽病是信阳茶树的主要病害,明确吡唑醚菌酯、苯醚甲环唑、氢氧化铜等几种杀菌剂对其的防治效果。[方法]于2015年间隔7 d连续施药2次,第2次施药后7、14、28 d分别对几种杀菌剂的防治效果进行比较分析。[结果]各药剂对该病均有一定的防治效果。其中,25%吡唑醚菌酯乳油的防效最好,其84、168 g a.i./hm^2处理在第2次施药后7、14、28 d的防治效果达到75.34%~87.94%;10%苯醚甲环唑水分散粒剂的防效次之,68 g a.i./hm^2处理在第2次施药后7、14、28 d的防治效果达到70.33%~80.87%。[结论]两种药剂对茶树安全,可以在生产中使用。

[Aims] Anthracnose is the major disease of Xinyang tea trees. This research aims to figure out the control effects among fungicides such as pyraclostrobin, difenoconazole, and copper hydroxide against anthracnose. [Methods] These fungicides were sprayed two times at 7 days intervals. And then comparative analyses were made on the control effects of these fungicides 7, 14, and 28 days after the second spraying. [Results] Experiment results showed that the fungicides had control effects on anthrax to a certain extent. Among these fungicides, pyraclostrobin 25% EC had the best control effect. And the control effects achieved 75.34-87.94% 7, 14, and 28 days after treatment for the second time at 84, 168 g a.i./ha respectively. The control effect of difenoconazole 10% WG took the second place, with the control effects of 70.33-80.87% 7, 14, 28 days after treatment for the second time at 68 g a.i./ha. [Conclusions] Both pyraclostrobin and difenoconazole are safe for tea trees, therefore they can be employed in actual production.