Control techniques of common diseases of grapevine

The main common diseases in the process of grape planting are black bean disease, powdery mildew, downy mildew, powdery mildew, powdery mildew and aphids.

Black bean disease

It is mainly harmful to new shoots and new leaves, which can be spread by wind and rain and protected by spraying during the growing period. About a week before flowering, it can be sprayed with 1, 0.5, 0.5, 240 Bordeaux liquid. After blossom, you can spray 1V / L / 200 Bordeaux solution or 50% mancozeb wettable powder 500 / 600 times or 50% carbendazim 800 / 100 times. Spray every 10 to 15 days.

Downy mildew

The leaves were damaged, the leaves initially showed oily spots, enlarged into yellowish brown, polygonal spots. When the environment is wet, there is a layer of white mildew on the back of the disease spot. Spraying Bordeaux solution with 1-mer-1-14-160 before the onset of the disease for 4 times and 5 times can control the occurrence of the disease. After the initial attack, you can spray 25% Ruidu 600 times the liquid.

Powdery mildew

It is mainly harmful to the fruit, which can be controlled by spraying 2000-3000-fold liquid scale or 1000-2000-fold liquid Lesben.

Powdery mildew

When it is rainy, the diseased fruit is easy to crack longitudinally, the pulp is exposed, and it is very easy to rot. It can be sprayed with 200-fold Bordeaux liquid before onset, and 800-fold 1000-fold solution of 70% methyl topiramate wettable powder or 800-fold 1000-fold solution of 25% trimethoprim.

Aphids

Mainly harmful to new shoots, drug control can spray 20% imidacloprid 2000-3000 times.