Peach is a fruit that people like in daily life. In recent years, with the strong market demand, the planting area of ​​peach trees has also increased. In the cultivation and management of peach trees, peach brown rot is one of the most serious diseases. Tree brown rot damages the flowers, leaves, branches and fruits of peach trees. Fruits suffer the most in the open field. Branches and flowers are the most severely damaged in protected cultivation. The leaves are severely damaged in years with heavy rains, and it can cause devastating losses in severe years.

　　 Penconazole, as the company's own original drug, has excellent control effects on white powder and white rot, and also has good application results on peach brown rot. In order to further explore the effect of penconazole on brown rot The application of the product and the direction of future product compounding, the corresponding drug test was carried out in Jindong District, Jinhua City. The test started from 2/3 of the peach deciduous flower, the young fruit period, the expansion period, and the color conversion period. Secondly, on May 24, the marketing department conducted a product return visit to Udragon Jixiu (20% penconazole EW), Udragon Caixiu (40% methioconazole SC pre-certification) and Udragon Jixiu (20% penconazole EW). Conazole (EW) and Udragon Meize (50% boscalid WDG) mixed application for final observation.

　　 In this experiment, 1500 times of 24% nibazole SC and 1500 times of Udragon Meikang (35% pyraclostrobin SC) were set as the control of the medicament, and the blank control without applying the medicine.

Untreated blank control group

　　 The blank control group investigated 6 trees, with a total of 147 diseased fruits. The average number of results for a tree was 158, and the diseased fruit rate was 15.5%. In the experimental treatment group, penconazole was treated alone, and the gradients were not significantly different. Under the three gradients of 3000 times, 2000 times, and 1000 times, the number of diseased fruits of 9 trees was 7, 9, and 7, respectively, and the diseased fruit rate Less than 0.1%, no phytotoxicity occurred under the high dose of 1000 times, which can meet the requirements for the prevention and control of peach brown rot in production, and the overall performance is satisfactory to farmers.

Orchard performance of treatment group

　　 In the compound treatment of penconazole, Udragon Caixiu (40% methioconazole SC pre-certification) 1000 times, Udragon Jixiu + Udragon Meze 3000 times and the control agent 24% nitrile There was no significant difference between benzoxazole SC 1500 times and Udragon Meikang (35% pyraclostrobin and pyridamide SC) 1500 times. There were only 1 or 2 diseased fruits in all 9 trees, which showed excellent control effect.

　　 The participating unit of this trial, Mr. Zhu from the Institute of Plant Protection, Jinhua Academy of Agricultural Sciences, combined with field medication and several follow-ups, and pointed out that penconazole can meet the field needs in the prevention and control of peach brown rot. There is no significant difference in the advancement process. In the production, it is recommended to use a low dose together with protective agents such as boscalid and iprodione, which can not only reduce the cost of medication, but also play a significant role in prevention.

Graphic | Yu Pengjun