Control measures of browning, moldy, softening and rotting zucchini brown rot

Zucchini brown rot, commonly known as "flower rot", "rotten eggs", caused a large number of zucchini young melon rot, a serious reduction in production. The pathogen infects the young fruit, mostly invades from the flower pedicel, thus spreads to the whole melon. Diseased melon external browning, rapid soft rot, humidity, diseased melon disease long white hair, from which you can vaguely see woolly mold top gray-white to black head. Finally, all the young melons rotted away. In a few cases, mature zucchini can also be locally browned, softened and rotten. When the stem and petiole are susceptible, they show water-immersed brown soft rot.

Zucchini brown rot

Prevention and control measures:

First, seed selection and soaking. Choose disease-resistant and coated seeds, such as uncoated seeds, zucchini seeds should be sterilized with seed dressing agent or seed soaking agent. Soak the seeds in 55 ℃ warm water for 15 minutes to strengthen ventilation and dissipate dampness. Greenhouse cultivation, can be in the summer leisure period, irrigation in the shed, the ground covered with plastic film, covered for a few days, the use of high temperature sterilization.

Second, reasonable close planting. Timely removal of diseased vines, diseased leaves, diseased plants, and take out of the field to burn, disease point application (quicklime). It is also noted that zucchini should rotate with non-melon crops for more than two years.

Third, irrigation to prevent dampness. High border plastic film cultivation, reasonable irrigation, after irrigation, timely release. In case flood irrigation leads to excessive soil moisture.

Fourth, pick diseased flowers and fruits. After setting the fruit, the residual flowers and diseased fruits were removed in time, and then buried deeply. When the cucurbit flower, stem and petiole are infected, remove the residual flowers in time and wipe the disease site with 50 times, the effect is very good.

Fifth, chemical prevention and control. After sowing, cover with medicine and soil, and before transplanting, spray once, such as 70% mancozeb wettable powder 500x solution, 50% prohydantoin 1000 times liquid or 77% killing wettable powder 400x solution for spray control, zucchini planted in protected areas can be fumigated with 200,250g 45% chlorothalonil per mu.