摘要
Abstract
To improve the control effect on peanut brown spot and ensure the quality and yield of peanuts,Hehua No.11 was used as the test peanut variety.A total of 9 pesticide treatments and 1 clear water control(CK)were designed,including 80%mancozeb at 100 g/667 m2(treatment 1),70%thiophanate-methyl at 90 g/667 m2(treatment 2),50%carbendazim at 120 g/667 m2(treatment 3),75%chlorothalonil at 100 g/667 m2(treatment 4),97%tebuconazole at 10 g/667 m2(treatment 5),95%difenoconazole at 12 g/667 m2(treatment 6),98.6%azoxystrobin at 15 g/667 m2(treatment 7),95%propiconazole at 15 g/667 m2(treatment 8),and 97.5%pyraclostrobin at 20 g/667 m2(treatment 9).The effects of each treatment on the disease index,control effect of peanut brown spot and peanut yield were determined.The results showed that treatment 7 and treatment 8 exhibited excellent control effects during the entire pesticide application period.The control effects 7 days after the 1st,2nd and 3rd pesticide applications were 74.84%-95.24%and 74.41%-95.19%,respectively,and the disease indexes were 1.17-1.89 and 1.19-1.91,respectively.Treatment 7 and treatment 9 achieved higher peanut yields,which were 393.77 kg and 396.13 kg/300 m2,respectively,increasing by 44.64%and 45.51%compared with CK.In conclusion,in peanut production,98.6%azoxystrobin at 15 g/667 m2(treatment 7)and 97.5%pyraclostrobin at 20 g/667 m2(treatment 9)can be used as high-efficiency pesticides for the control of peanut brown spot to further improve peanut yield.This study provides a reference for the control of peanut brown spot.关键词
花生/褐斑病/防效/产量Key words
peanuts/brown spot disease/control effect/yield分类
农业科技
