Corner spot disease leads to yield reduction of cucumber how to control cucumber corner spot disease

Cucumber angular spot is a bacterial disease, which is caused by Pseudomonas aeruginosa bacteria. Cucumber can be infected throughout the growth period, and the yield is reduced by 10%. The yield is reduced by 30%. Control methods:

Cucumber angular spot

1. Seed treatment: cucumber and non-melon vegetables have been rotated for more than 2 years. Disease-resistant cucumber varieties were selected. The cucumber seeds collected from disease-free or disease-free cucumber plants can be soaked in 55 ℃ warm water for 15 minutes, or with 3000 times of neophytomycin for 2 hours, or formalin for 1.5 hours.

2. Strengthen management: cultivate disease-free and strong seedlings, cucumber protected ground, timely release wind and reduce dampness, control watering, open field, high ridge plastic film mulching cultivation, and remove diseased leaves in time.

3. Biological control: at the beginning of the disease, 72% agricultural streptomycin soluble powder, or 4000-fold solution of neophytomycin, or 100-fold solution of agricultural antibiotic 120 (pyrimidine nucleoside antibiotics) were sprayed for 3 times every 6 to 7 days.

Spray: at the beginning of the disease, alternately spray 300 times of 12% green EC and 38% cuproloxil (control effect is as high as 93%! ) the water agent 800 times liquid, which occurs at the same time with downy mildew, is sprayed 500 times, such as 77% killing wettable particulate powder, 58% Ruidu wettable powder, 50% nail cream copper wettable powder, 56% pyrifoxil chlorothalonil emulsifier, 49% Ruinong wettable powder, 60% chlorothalonil wettable powder, etc., once every 6 days and 3 times in a row.

Powder spraying: at the beginning of cucumber disease, spray 5% Ruinong dust agent, or 5% anti-bacterial dust agent, when it occurs at the same time as downy mildew, spray 12% ethyl dust agent, or use 7% anti-mildew dust agent + 5% anti-bacterial dust agent, spray 1 kg per mu of cucumber, once every 7 days, 3 times in a row.