Answer: Pumpkin powdery mildew is the most serious disease in the hot season. The infected leaf surface is mostly covered by white powder, causing photosynthesis to be significantly impeded, leaving the leaves yellow and scorch and affecting pumpkin sturdiness.
Control measures: The selection of good disease-resistant varieties, sowing in the sun before sowing 1-2 days before sowing, to kill epidermis miscellaneous bacteria, seed dressing with new high-fat membrane seeding, isolate the infection of underground bacteria, improve the emergence rate.
Reasonable fertilization, mainly of decomposed farmyard manure, combined with spraying of guttatine, can increase the water absorption and absorption of pumpkins, increase the disease resistance of pumpkins, and reduce the incidence of cracked fruit, stale fruit and malformed fruit.
Watering at the right time to keep the soil moist is appropriate. Drain the drain immediately after the rain. The basal diseases and old yellow leaves were removed and buried deep or concentrated to strengthen ventilation and light in the fields, and to enhance plant resistance.
Before onset or early onset, timely use of targeted agents plus a new high-fat film, sprayed once every 5-7 days, continuous spray 2-3 times, can effectively prevent pumpkin powdery mildew damage.
Handle Locks,Quarter Turns,Stainless Steel Handle Locks,Door Handle Locks
Ningbo Hengchieh Locking Technology Co., Ltd. , https://www.hengchieh.com