Attention grape growers, how to prevent grape gray mold?

1) Strengthen orchard management: reasonable watering, reduce humidity, and apply less nitrogen fertilizer. Prevent overgrowth and enhance tree momentum.

2) Clean the garden: remove diseased ears, diseased fruits, diseased leaves, etc.

3) Pharmaceutical control: spray 50% Suclin WP 2000 3000 times before flowering, or 50% promethane wettable powder 1500 times, or 50% Nonlilin WP 1500 times, or 70% thiophanate-methyl WP 1000 times, or 50% polychlorsulfate WP 1500 2000 times, once every 10 15 days, and prevent 2 3 times.

Planting grape "gray mold", also known as cob brown blight, prevention is the key!

Prevention and control methods:

Prune carefully, cut off diseased branches, diseased fruit ears and diseased tendrils, and completely remove them outside the room (shed) to burn or bury deeply. to remove the pathogen.

Sweep the fallen leaves, and combine fertilization, and mix the fallen leaves and the top soil with fertilizer and bury them deep in the fertilization ditch.

The non-drip antifogging film is used as the outer covering material of the facility, and the ground in the facility is covered with a full-area plastic film to reduce the humidity in the room (shed), inhibit the germination of pathogen spores, and reduce infection; Increase ground temperature, promote root development, enhance tree potential, and improve resistance; Prevent residual germs in the soil from escaping into the air and reduce the incidence rate.

Pay attention to adjust the temperature and humidity in the room (shed), maintain the indoor temperature of the white angel at 32-35, control the air humidity at about 75%, maintain the temperature in the room (shed) at night at 10-15, and control the air humidity below 85%, inhibit the germination of germination of germination, slow down the growth of germs, and control the occurrence and development of diseases.

Ear bagging to eliminate the harm of pathogens to the ear.

Do not remove the canopy film in summer, (you can open the big top air outlet and bottom air outlet), so as to prevent the spread of germs through rainwater and induce the disease of branches and leaves.

Chemical control: Every 15-20 days, carefully spray 1 time of 240-200 times half of Bordeaux liquid to protect the tree. And between the two Bordeaux liquids, a high-efficiency, low-residue, non-toxic or low-toxicity biocide is sprayed.

The following pesticides can be used alternately: 50% mancozeb wettable powder 500 times, 80% spray wettable powder 800 times, 80% methyl tobuzin wettable powder 1000 times, 70% Kelu wettable powder 700-800 times, 75% chlorothalonil wettable powder 600-800 times, 50% antibacterial special wettable powder 600-800 times, 80% anthrax Fumei wettable powder 600 times, 20% silver fruit wettable powder 600 times, etc. In order to improve the control effect, when spraying non-alkaline liquid, 600 times of "Tianda 2116" or 1000 times of drought and flood harvest can be added.

Spraying is generally in the morning after the sun dries the dew, not in the cloudy day and noon, the cloudy day will be washed away by the rain, the center of the grape at noon is open, there will be a certain harm to the grape technical leaves.

The following measures should be taken to prevent and control grape gray mold:

1) Clean the orchard:

The sclerotia overwintering on the diseased residue is the main source of initial infection, therefore, it is necessary to combine the prevention and control of other diseases to completely clear the garden and do a good job in the prevention and control of the overwintering dormant period. After the onset of the disease in spring, the diseased flower spikes should be carefully removed and destroyed to reduce the source of reinfection.

2) Strengthen orchard management:

Control the use of fast-acting nitrogen fertilizer, prevent branch growth, inhibit vegetative growth, properly prune overgrown branches, or spray growth inhibitors, do a good job in the ventilation and light transmission of the orchard, reduce field humidity, etc., and have a better effect on preventing gray mold.

3) Timely pest control:

Pest control can reduce fruit wounds, so that gray mold is less likely to infect fruit grains.

4) Pharmaceutical prevention and control

Spray once in the spring germination period 3 5 Baumé stone sulfur mixture; Spray 1 2 times before flowering for prevention, you can choose 50% carbendazim wettable powder 500 times, 50% Herui water dispersible granules 1200 times, 70% thiophanate-methyl wettable powder 800 times, 50% promethine wettable powder 800 times, etc., but the resistance of Botrytis to a variety of chemical agents is stronger than that of other fungi. In addition, 600 times of 75% Daknin wettable powder, 400 times of 3% polyantimycin, etc., can also treat gray mold.

Botrytis cinerea. 10 days before flowering and 1-2 days before the first flowering is the key time for the prevention and control of pesticides, the commonly used agents are 30% Ai Miao EC 5000 times liquid, 50% Sukelin wettable powder 1000 times liquid, 50% carbendazim 800 times liquid, 50% quick-extinguishing wettable powder 2 000 4 000 times liquid, 25% 100 grams of wettable powder 1 000 times liquid, 80% Dasheng one m wettable powder 800 times liquid, Fengshou pure wettable powder 800 times liquid, 65% Kedling wettable powder 1 000 1 500 times the solution.

Grapes grown in sheds were disinfected by spraying 50% of Formais 400 times or 1 000 times of promein in combination with the prepared soil before the shed.