Method for efficiently preventing and treating northern corn leaf blight

Abstract

The invention relates to a method for efficiently preventing and treating northern corn leaf blight, which is characterized by comprising the following steps: (1) blending 40% of coumoxystrobin tebuconazole and 25% of azoxystrobin according to a ratio of 1:1, and then adding water according to a ratio of 1:1000 to 15000, (2) using a high-clearance sprayer and a knapsack type sprayer to uniformly spray the leaf surfaces during the growth period, namely the flare opening period, of a susceptible northern corn leaf blight cultivar, (3) if an aviation work is needed, adding water into the blended 40% of coumoxystrobin tebuconazole and 25% of azoxystrobin according to a ratio of 1:20, namely 10 to 15 ml of 40% of coumoxystrobin tebuconazole, and 10 to 15 ml of 25% azoxystrobin are needed every 667m <2 >. According to the method provided by the invention, a formula of bactericide blending is adopted, when carrying out spraying during the flare opening period, the northern corn leaf blight can be efficiently prevented and treated.

Description

technical field [0001] The present invention relates to a method for effectively preventing and treating large spot disease of corn, that is, a method of preventing and controlling large spot disease of corn (commonly known as streak disease, coal streak disease, and dead leaf disease) by using a mixed chemical fungicide, and the use period of the agent is strictly limited. The time period belongs to a technology for the prevention and control of maize leaf spot disease. Background technique [0002] Since 2006, with the popularization of Xianyu 335, a variety susceptible to maize leaf spot disease, in Northeast China, the problem of maize leaf spot disease has become more and more prominent. Domestic maize varieties are mostly cultivated with Xianyu 335 as the target, and are bred on the basis of its male parent, female parent or similar inbred lines of American varieties, and most of the new varieties bred are also susceptible to large leaf spot. At present, there is no b...

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