新型三唑衍生物与氢氧化铜复配药剂对辣椒炭疽病的防控及增产效果OA

Pepper anthracnose is a major fungal disease restricting the development of the pepper industry.To screen high-efficiency and long-acting control agents,this study used the pepper cultivar'Hongbaota'as the test material.Nine triazole derivatives were compounded with copper hydroxide at a mass ratio of 1∶5.Laboratory antibacterial tests and field efficacy trials were conducted to systematically evaluate the inhibitory activity of the compound agents against Colletotrichum capsici,as well as their field control effect and yield-increasing performance.The results showed that the indoor inhibition rate of all compound agents was significantly higher than that of the medicated control(CK,difenoconazole+copper hydroxide).Among them,the compound treatment(T3)of(1H-1,2,4-triazole-3,5-diyl)bis(azoimino)bis(methylene)bisphenol combined with copper hydroxide exhibited the best performance,with the highest inhibition rate of 95.67％,which was significantly increased by 27.53 percentage points compared with CK.Field trials indicated that T3 achieved the highest control efficacy of 82.74％and 68.12％at 21 d and 30 d after pesticide application,respectively.The control efficacy at 30 d was significantly superior to that of other treatments and CK,showing an outstanding persistent effect.The pepper yield of T3 treatment reached 2 518.9 kg per 667 m2,which was significantly higher than that of other treatments,the control(CK)and the blank control(CK1).Compared with CK and CK1,the yield increased by 37.21％and 96.20％,respectively.This study developed a new compound pesticide,which provides a technical support for the green and efficient prevention and control of pepper anthracnose.