2017 common pest control methods for grape growing techniques [Figure]

White rot

Mainly for the ear (cob, fruit) and branches. In the middle and late (color-changing period) onset; high temperature, high humidity incidence, heavy hail or storm, it is easy to cause a pandemic; management of extensive, diseased and mechanical damage, the results of low parts of the orchard.

Control measures: reduce the source of infection, ground film, elevated cultivation, and improve fruit position. Effective agent: 80% mancozeb wettable powder 800 times solution or 50% thiram double wettable powder 500 times solution, 25% tebuconazole emulsifiable concentrate 2500 times solution, 25% pyraclostrobin ester emulsifiable concentrate 3000 times solution.

anthrax

Mainly harmful to the ears and branches. In the early stage of infection, the incubation period lasted for more than 20 days. The disease began to occur in the near maturity stage, and the fruit matured into the prosperous period; the disease occurred at high temperature and high humidity.

Control measures: Infection before and after the growth period, combined with prevention and control of white rot and downy mildew before and after flowering, spray an effective agent at intervals of about 15 days, focusing on protecting the ear, and the drug is similar to white rot.

Downy mildew

It is mainly harmful to the leaves, and can also infect young tissues such as young shoots and young fruits. Low temperature in autumn, more rainy and more exposed, easy to cause disease prevalence. The orchard is low-lying, and the poor ventilation of the frame surface is weak, which is conducive to disease occurrence.

Control measures: mainly shelter from rain. Effective agent: 80% mancozeb wettable powder 600 times solution or 50% thiram double wettable powder 500 times solution, 250 g / liter of azoxystrobin emulsifiable concentrate 1000 times solution, 50% enoylmorpholine WP 2500 times Liquid, 66.8% C. sinensis WP WP 700~1000 times solution.

Black pox

Mainly harmful to the green and young part of the grape. The onset of the disease is from mid-June to early July. The incidence of partial nitrogen fertilizer is heavy; the soil is sticky, the groundwater level is high, and the humidity is heavy.

Control measures: starting from the exhibition leaves, spray a protective fungicide once a week before flowering, effective agent: 80% mancozeb WP 800 times or 50% carbendazim WP 1000 times 40% fluorosilicone emulsifiable concentrate 8000 times solution and 25% tebuconazole emulsifiable concentrate 2500 times solution.

powdery mildew

It is mainly harmful to the young organs such as leaves, new shoots and fruits. There is a layer of white powder on both the front and back of the lesion. The temperature rises from 25 °C to 30 °C, and the drought or dry-wet is suitable for disease prevalence.

Control measures: Spray 3~5 wave of sulphur sulphur mixture before germination, completely eliminate the pathogens of wintering, and pay attention to remove buds and diseased shoots in time; choose to spray tebuconazole or difenyl ring before or during the onset. A triazole fungicide such as azole.

Gray mold

Mainly harmful to the fruit and inflorescence. Rainy, humid and cooler weather conditions are suitable for gray mold; grape flowering and fruit ripening are the peak of the disease.

Control measures: clean the orchard; control the use of quick-acting nitrogen fertilizer; reduce the humidity in the field. Effective Pharmacy: Spray 1~2 times before flowering and before bagging. It can be used alternately with procymidone, iprodione, vinyl nucleus and pyrimethanil.

Brown spot

Mainly harmful to the leaves, causing early leaves. Generally, it begins to occur after fruit setting, and it is more common in the leaves near the ground, spreading upwards; it is easy to develop in high temperature, high humidity and rainy seasons.

Prevention and treatment methods: spraying prevention and treatment at the beginning of the disease. Effective agents: Bordeaux mixture or Bensen zinc, mancozeb, tebuconazole, etc., spray once every 10 to 15 days, continuous spraying 2 to 3 times. The first and second sprays should focus on spraying the lower leaves.

This article URL: 2017 common practices of pest control in grape growing technology [Figure]

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