Integrated prevention and control of squash
The recent phenomenon of rotten gourd stem squash is mainly caused by two kinds of diseases. One is blight. The pathogens mainly invaded from the stem segments of zucchini, and the diseased part was dark brown at first, then gradually turned black. The diseased spots were easily cracked and white gelatinous substances flowed out. The stems of the diseased stems shrank and the longitudinal cracks were like numbness. The second is soft rot. It was mostly infected from the roots and necks of zucchini. The vines first became water-stained and then gradually became soft. The diseased parts were depressed and the internal tissues rotted, forming a gray-brown viscous material with bad odor.
To deal with the bad stems of zucchini caused by these two diseases, we must first avoid high temperature and humidity in the shed. Zucchini bacterial blight and bacterial soft rot disease occur in high temperature and high humidity environment. Shelter management should pay attention to strengthening ventilation and cooling. The temperature of the canopy during the day should be controlled at about 23°C and controlled at about 13°C at night. Second, we must protect plant wounds. Avoid evading leaves, picking melons, and snoring when the humidity in the shed is high, and apply wounds such as copper copper citrate and other copper preparations. Once again, we must do a good job of chemical control. For the spoilage disease, it can be sprayed with 25% prochloraz EC 1500 times or Ami Miao 325 g/liter azoxystrobin SC 1000 times. For bacterial soft rot, 72% of agricultural streptomycin sulfate soluble powder (1500 times liquid) and 30% copper citrate copper wettable powder (500 times liquid) spray can be used to prevent and treat every 5 to 7 days. Continuous control 2 to 3 times.
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