First, the symptoms
Bitter gourd Wilt is a fungal disease that occurs in the stem branch of the main vine, and symptoms of water scalding occur at the beginning of infection, and the disease department quickly expands up and down the internodes. Later, the diseased part turned brown and rotted and contracted. The disease can also occur in the ground roots. It also appears as a hot water symptom at the beginning of infection, followed by browning and rotting of the diseased part, and the plants in the shoot lose water and wither. If it is not controlled in time, bitter gourd will cause serious reduction in production.
Second, control methods
(1) Strictly implement the rotation for more than three or four years, and pay attention to the land types with high topography and good drainage.
(2) Selection of disease-resistant cultivars. Seeds must be preserved from disease-free plants when collecting seeds.
(3) Strict seed disinfection before sowing, generally 40% formalin 100 times soaking for 30 minutes, or 50% carbendazim 1500 times soaking for 1 hour, and then remove with water rinse after germination sowing.
(4) High ridge cultivation, more phosphorus, potassium fertilizer, less nitrogen fertilizer. Make full use of organic fertilizer as base fertilizer. During the onset of the disease, the number of waterings should be appropriately reduced, flood irrigation should be strictly prohibited, and timely drainage should be performed after the rain.
(5) Observe the observation and find that the diseased plants are eradicated by eradicating and eradicating roots and soil, and lime is used to prevent disease from spreading.
(6) Conduct chemical control. At the growth stage or early stage of disease, 70% thiophanate 1500 times, or 1000 times carbendazim can be used to irrigate the rhizosphere soil of the plant, and the dose is about 300 ml per plant.
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