Seed melon black spot control

Inquiries: I am a Jingtai farmer. Our main plant here is melon seed. However, black spot disease is very serious every year. Often the leaves are dry during the fruit enlargement period. How do experts control?

Answer: 1. Completely remove the sick body and bring it to the field for centralized treatment to reduce the source of overwintering.

2. Reasonable fertilization, to avoid partial nitrogen fertilizer, in order to enhance the plant's resistance to disease.

3. When there is a lot of rainfall, it is necessary to drain the fields in time.

4. Seed treatment before sowing. Use 75% chlorothalonil or 50% acetaminophen wettable powder 1000 times soaking for 2 hours, remove and germinate after germination.

5. Incipient onset of spraying control. Can be used 75% chlorothalonil 600 times WP, 70% mancozeb WP 500 times, 50% sikling or 50% acetaminophen WP 1000 times spray. Once every 7 to 10 days, spray 2 or 3 times.

The farmer came to the telephone and said that they often used metalaxyl manganese zinc spray, which was not effective. The reason is that metalaxyl Mn-Zn spray is used to prevent lower fungal diseases. Such as Phytophthora. Black spot is caused by higher fungi, so the control effect is not good.

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