Farmers are most afraid of planting cucumber is rotten man. Rotten vines refer to the weather when cucumbers begin to produce large amounts of melons, which are exposed to high temperature and high humidity. Within a few days, melon vines will be wilted throughout the entire ridge, and there are obvious spots on the vines. Cucumber sp
Cucumber leaf blight is a fungal disease that is caused by infestation with Ascomycetes, which not only damages stem vines, but also damages the leaves and fruits. When the leaves are damaged, they produce near-circular or irregular shaped large lesions. Some lesions develop inwardly from the leaf margins in a "V" shape or in a semicircular or light brown color. The late lesions were cracked and cracked. After desiccation, the lesions were yellow-brown to reddish-brown, and the lesions had dense black spots. When the stem is damaged, it shows oily spots near the nodules, oval or prismatic, off-white, slightly concave, and sometimes overflowing with amber resinous jelly. When dry, the diseased part is shrunk and split longitudinally, and a large number of small black spots are scattered on the surface; when the moisture spreads, the lesion spreads quickly, and the upper half of the planting bead wilts to death and the disease part rots. The fruits were mostly infected by flower buds during the young period of melons, and the flesh was light brown and soft, showing heart rot.
Both seed-borne bacteria and soil-disease carriers are the primary sources of infection, and storms and irrigation water are the mediators of the disease. Germs invade through air holes, water holes, and wounds. Seed carriers can directly infect cotyledons. Soil moisture, stems often contact with water, the field of high relative humidity, are likely to cause disease. Melons are heavily planted, densely planted, with excessive nitrogen fertilizer application, poor ventilation in the field, or insufficient fertilizer, and declining growth will aggravate the occurrence of diseases.
The following control measures can be used in current production:
1. Do not use melons as a continuous crop, apply sufficient organic manure, increase phosphorus and potassium fertilizers, and pay attention to ventilation and reduced humidity to enhance plant resistance.
2. Seeds should be collected from disease-free plants. Seed disinfection should be performed by seed dressing with 0.3% Boring or soaking in warm water at 55°C for 15 minutes or 40% in 100% solution of formaldehyde for 30 minutes.
3. Spray 40% suspension of behenine or chlorothalonil 600 to 800 times, 60% of Potentin 800 to 1000 times, 70% of thiophanate-methyl wettable powder 800 to 1200 times, 50% Carbendazim WP 600 times. All over the field spraying, spraying once every 4 to 5 days, 2 or 3 times in a row. In addition, the lesion on the stem of cucumber can also be coated 50 to 100 times as much as the above-mentioned medicament, and the effect is also very good.
Cucumber leaf blight is a fungal disease that is caused by infestation with Ascomycetes, which not only damages stem vines, but also damages the leaves and fruits. When the leaves are damaged, they produce near-circular or irregular shaped large lesions. Some lesions develop inwardly from the leaf margins in a "V" shape or in a semicircular or light brown color. The late lesions were cracked and cracked. After desiccation, the lesions were yellow-brown to reddish-brown, and the lesions had dense black spots. When the stem is damaged, it shows oily spots near the nodules, oval or prismatic, off-white, slightly concave, and sometimes overflowing with amber resinous jelly. When dry, the diseased part is shrunk and split longitudinally, and a large number of small black spots are scattered on the surface; when the moisture spreads, the lesion spreads quickly, and the upper half of the planting bead wilts to death and the disease part rots. The fruits were mostly infected by flower buds during the young period of melons, and the flesh was light brown and soft, showing heart rot.
Both seed-borne bacteria and soil-disease carriers are the primary sources of infection, and storms and irrigation water are the mediators of the disease. Germs invade through air holes, water holes, and wounds. Seed carriers can directly infect cotyledons. Soil moisture, stems often contact with water, the field of high relative humidity, are likely to cause disease. Melons are heavily planted, densely planted, with excessive nitrogen fertilizer application, poor ventilation in the field, or insufficient fertilizer, and declining growth will aggravate the occurrence of diseases.
The following control measures can be used in current production:
1. Do not use melons as a continuous crop, apply sufficient organic manure, increase phosphorus and potassium fertilizers, and pay attention to ventilation and reduced humidity to enhance plant resistance.
2. Seeds should be collected from disease-free plants. Seed disinfection should be performed by seed dressing with 0.3% Boring or soaking in warm water at 55°C for 15 minutes or 40% in 100% solution of formaldehyde for 30 minutes.
3. Spray 40% suspension of behenine or chlorothalonil 600 to 800 times, 60% of Potentin 800 to 1000 times, 70% of thiophanate-methyl wettable powder 800 to 1200 times, 50% Carbendazim WP 600 times. All over the field spraying, spraying once every 4 to 5 days, 2 or 3 times in a row. In addition, the lesion on the stem of cucumber can also be coated 50 to 100 times as much as the above-mentioned medicament, and the effect is also very good.
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