Melon "headless" prevention

The "headless seedlings" are often not grown due to the emergence of seedlings or the opening of cotyledons after seedlings, or the growth points are small and do not grow. The tip of the victim's seedlings will usually yellow and sink inwards, or the cotyledons will become hypertrophic and dark green.

cause:

1. The seed quality is poor. In particular, Chen seeds were used to sow seedlings. The seedlings often grow weakly and have poor resistance. When the temperature is low, headless seedlings are more likely to appear.

2. There is a problem with nursery management. The ground temperature is too high, but the temperature is low, or cold temperatures in a certain period of time, growth point differentiation is inhibited, and can not be normal development.

3. Shed film dripping. If you are not using a drip-free membrane, improperly draining moisture from the field, dropping water droplets under the shed film and dripping onto the growing point will cause poisoning and death.

4. Diseases and insect pests. In particular, the infestations of humming horses, yellow hops, and bud blight will cause headlessness.

Control methods:

1. Try to use fresh and high quality seeds for seedlings.

2. Strengthen seedling management. In the nursery should pay attention to insulation, especially the preservation of temperature. Conditional hotline nursery should be adopted. The temperature during the nursery period should be controlled at 30°C during the day and 18°C ​​to 20°C during the night. At the same time, water should be sprayed properly, and care should be taken to increase lighting.

3. Headless seedlings have been produced, and borax can be sprayed from 2 to 3 turns to promote leaf blade emergence.

4 good pest control. Nursery sheds should do a good job in the prevention and control of pests and diseases, with emphasis on the prevention and control of thrips, yellow song strips and bud blight.

5. Use a drip-free membrane to prevent the poisonous water droplets from dripping onto the plants.

6. Try not to use herbicides in nursery sheds.

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