Cold Shed Cucumber Common Disease Prevention and Control Methods

Cold Shed Cucumber is an important early spring fruit vegetable variety. At the turn of spring and summer, the temperature fluctuates, and the rapid changes in external environmental conditions often have negative effects on the normal growth of cold-shelter cucumbers, often inducing a variety of diseases, and causing great economic losses to vegetable farmers. Here are some common diseases and prevention methods of cucumber in cold springs in spring.

When the temperature reaches 15°C-28°C and the relative humidity is more than 80%, the disease is easy to develop; the temperature of the greenhouse is low, the watering is too much, the plant growth is strong, and the field canopy closure and even rainy weather can cause the disease. The occurrence and prevalence. At the beginning of the disease, 25% of thioredox can be used for 800 times, or 64% of antiviral 400 times, or 72.2% of Propex 800 times for spray, and 7-10 days for 1 spray, spraying 3-6 times. Such as downy mildew outbreak, difficult to control, you can consider high temperature stuffy shed method (provided that the cucumber plants must be robust), choose sunny watering in the morning, increase indoor humidity, in order to improve the plant's high temperature capability, close the greenhouse to room temperature Raise to about 45°C, hold for 1.5-2 hours (start timing from 43°C), then cool down. After the shed, the plants and young larvae are affected by high temperature, and the growth will be subject to certain restrictions. In order to restore the growth momentum as soon as possible, the quick-acting fertilizer may be applied, or the leaves may be topped with sugar and nitrogen to supplement the nutrition.

Fusarium wilt disease develops rapidly when the temperature is between 24 and 30°C, and it is easy to develop disease under conditions such as soil viscosity, poor drainage, excessive watering, more underground pests, and more root wounds. The diseased plants in the field should be promptly treated with pesticides. The relatively severe diseased plants should be immediately removed and applied in the diseased planting holes to prevent the spread of pathogenic bacteria caused by flowing water and cultivating. At the beginning of the onset, 50% carbendazim 500 times solution or 50% thiophanate-methyl 400 times solution can be used to irrigate the roots. 250 grams of the medicinal liquid per plant is used, 10 times a day irrigation, and 2-3 times irrigation. At the same time, do not injure the roots and vine vines during cultivating, pruning, spraying, and melon harvesting to prevent the bacteria from infecting the plants through the wound.

Powdery mildew in the fields is closed, and plants are prone to disease on condition of leggy. In the early stage of disease, agricultural antibiotic 120, or 40% DuPont Fuxing 2000X liquid spray, spray 7-10 days, and sprayed 3-4 times.

Bacterial angular spot disease is prone to disease due to high humidity, heavy rainfall, and poor ventilation. At the beginning of the disease, DT fungicide 500 times, or 47% Garethon 600-800 times spray, spray 5-7 days, spray 3-4 times.

When the disease meets the conditions of high temperature, rain, and humidity in the field, it is easy to develop. Available early in onset. Use 25% thioredoxin 800 times, or 72.2% Prec 400-600 times spray, spray 5-7 days, spray 3-4 times.

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