(1) Reasonable planting density and reasonable pruning make the tree structure reasonable, the branches and leaves are evenly distributed, and good ventilation and light transmission conditions are maintained. (2) Strengthen fertilizer and water management, improve tree vigor and enhance disease resistance; Cut or remove diseased branches, leaves and fruits in time, and burn or bury the peel of walnuts after harvesting to reduce the source of overwintering bacteria. (3) Prevent pests such as walnuts in time, and use sticks as little as possible when picking fruits to avoid damaging branches, reducing wounds and reducing the chance of bacterial infection. (4) In the first half of March before germination, carefully spray sulfur and a mixture of sulfur once. Spraying 70% thiophanate methyl and streptomycin sulfate once every 15 days from May to July after germination and flowering can be used alternately with ethylicin, copper oxalate or 1: 0.5: 200 bordeaux solution to prevent drug resistance.

(1) Reasonable planting density and reasonable pruning will make the tree structure reasonable, the branches and leaves evenly distributed, and maintain good ventilation and light transmission conditions. (2) Strengthen fertilizer and water management, improve tree vigor and enhance disease resistance; Cut or remove diseased branches, leaves and fruits in time, and burn or bury the peel of walnuts after harvesting to reduce the source of overwintering bacteria.

(3) Prevent pests such as walnuts in time, and use sticks as little as possible when picking fruits to avoid damaging branches, reducing wounds and reducing the chance of bacterial infection. (4) In the first half of March before germination, carefully spray sulfur and a mixture of sulfur once. Spraying 70% thiophanate methyl and streptomycin sulfate once every 15 days from May to July after germination and flowering can be used alternately with ethylicin, copper oxalate or 1: 0.5: 200 bordeaux solution to prevent drug resistance.

For your reference.