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Two diseases cause zucchini rotten culms
In interviews with Gaoliu Town, Qingzhou City, Shandong Province, many vegetable farmers planting zucchini reported to reporters that the phenomenon of bad stalks has recently been serious, and some have even caused zucchini to die. Which diseases can lead to the phenomenon of rotten stalks in squash, and how should the vegetable farmers control it? There are two main diseases that can cause slugs in zucchini: The first is the spoilage disease. This disease mainly stems from the stem section of the zucchini, and the site is dark brown at the beginning of the disease, and then gradually turns black. The disease site is easy to crack, and the white gelatinous substance flows out. The stem of the disease is shrunk later and the longitudinal cracks are like numbness. . The second is soft rot. The soft rot of zucchini grows from the roots of zucchini. The stalks first appear to be immersed in water and become soft gradually. The diseased part is depressed, and the internal tissues are rotted, forming a gray-brown viscous material with bad odor. For the zucchini rotten stalk caused by these two diseases, vegetable farmers should pay attention to the following points: First of all, to avoid high temperature and humidity in the shed. Studies have shown that spores and bacterial soft rot of zucchini are severely affected by high temperature and high humidity. Therefore, in the management of greenhouses, attention should be paid to enhancing ventilation and cooling. It is advisable to control the daytime temperature in the shed at 23°C. If the temperature in the shed is higher than 25°C, be sure to pay attention to ventilation and cooling; in the evening, the temperature in the shed must be controlled. About 13 °C is appropriate. Second, protect plant wounds. Farmers can easily cause wounds after severing leaves, picking gourds, and snoring. The pathogens are easily infested by these parts. The vegetable farmers should avoid operating the plants in rainy days and after just pouring water to ensure that the plant's wounds are sufficiently healed. Outside of time, it is also necessary to pay attention to keeping the leaves and handle, and use DT and other copper preparations to apply the wound. Again, vegetable farmers should pay attention to the use of drug prevention. When cabbage blight occurs, the vegetable grower can use 25% prochloraz 1500 times, or Ami Miao receive 1,000 times liquid; and for bacterial soft rot, vegetable farmers can use agricultural streptomycin 1500 times and DT500 times control, spraying once every 5 to 7 days, continuous spraying 2 to 3 times, can play a good control effect.