After freezing and freezing damage, the leaves, stems, roots and other organs of vegetables are damaged, and the pathogens are easily invaded by these injured tissues. If measures are not taken to prevent and control them in time, it may easily cause gray mold, sclerotinia, and bacterial fluids. The epidemic of low temperature and high humidity diseases, in addition, root rot, blight and other root diseases will also increase the trend.

Xiao Bian reminds everyone here that after the occurrence of low temperature in rain and snow, we must not only pay attention to cold and frost, but also to prevent and control secondary diseases such as downy mildew in time. Here are some specific prevention and treatment measures to help everyone to rescue frozen vegetables. .

First, strengthen management

1. Timely harvest, strengthen management

For vegetables that have matured in time, the immature vegetables should be strengthened. For the solanaceous vegetables, melons, and legumes that have been harvested from root vegetables, leafy vegetables, cauliflower vegetables, and necrosis at the growing point, timely ploughing, soil preparation, and clearing of the pastoral areas will be quickly replanted after the temperature rises. For vegetables that are not deeply damaged, the root system can be promoted by timely ditching and drainage, reducing the humidity in the field, cultivating the soil and applying the quick-acting fertilizer, spraying the leaves with 0.3-0.5% urea solution and 0.2% potassium dihydrogen phosphate solution. Recover and grow as soon as possible.

2. Insulation and humidity

For the seedlings with less severe frostbite, it is necessary to cover several layers of film, cover rice straw at night, and sprinkle wood ash in the seedbed to reduce soil moisture.

3. Spray pesticides to enhance disease resistance

Spraying drugs containing components such as gibberellin or alizarin can promote cell division and enhance plant resistance.

Second, disease prevention

After the vegetables are frozen, the organs of the frozen vegetables are usually removed, the frozen tissues are cut off in time, and a safe and effective protective agent is sprayed to prevent downy mildew, sclerotinia, bacterial fluid, and root rot. Diseases and other diseases occur. Planters can timely and targetedly spray pesticides according to the occurrence of field diseases.

1. Downy mildew

This can be controlled by applying 50% cymoxanil wettable powder, or 50% dimethomorph WP wettable powder 1500 times, or 72.2% Proplocarb water 800 times.

2, gray mold

Can use 50% procymidone wettable powder 1000 times, or 50% bovismicin water dispersible granule 2000 times, or 50% fluoxetil WP wet 5000 times spray control.

Sclerotinia

Can use 50% carbendazim WP, or 40% sclerotin net WP 1500 times, or 25% chlorpromazine EC 1500 times, or 40% fluazinam suspension 2500 times spray control .

Root rot

Can be used thiophanate-methyl WP 600 times, or 50% of iprodione WP 800 to 1000 times, or 3% of methotrexate f mold water agent 600 to 800 times Irrigation root control.

5, wilt

You can use 50% thiram WP 600 times, 70% thiophanate-methyl wettable powder, or 2% NS wettable powder 600 times for root irrigation.

6, bacterial diseases

Can use 46% copper hydroxide water dispersible granules 1500 times, or 3% methobiotin wettable powder 800 times, or 30% copper jelly copper wettable powder 800 times, or 20% thiazole zinc suspension 800 times liquid spray control.

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