Botrytis is a low temperature and high humidity type disease. It mainly affects young larvae, leaves and stems. The disease minister grows hairy. When rotten or rotten flowers are attached to the stem, it can also cause rot in the stem. In severe cases, the lower knots rot and cause the vine to break and the plants die.
Control methods:
1, control the temperature of the greenhouse, try to increase the temperature to 25 ~ 30 °C, cloudy days without water, promote the use of small water under the film to the water supply, clear and wet spreading. After the occurrence of gray mold, the diseased melons were promptly removed, brought out in deep burial, and the debris was burned after pulling.
2. In the middle and late stages of cucumber growth, foliar spray of 0.1% urea plus 0.3% potassium dihydrogen phosphate or foliar application of spray-applied water, with 10 liters of water per milliliter, can increase plant resistance to disease.
3, commonly used agents are 72% Kelu or 58% metalaxyl WP WP 600 times, in the early stage of the seedling and flowering results of a spray prevention, the initial incidence of continuous spraying 2 to 3 times.
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