Degree of occurrence: Level 4 is expected to occur.
1, this year, the main push varieties (such as Ezamian 23, 24, etc.) are less resistant.
2. When the weather is sunny and rainy, it is particularly beneficial to the occurrence and epidemic of cotton brown wilt.
1, Qinggou row stains.
2. Chemical control: When the weather is fine, it should be promptly used with yellow or pure pyrimidine nucleoside 100ml/mu.