What about the yellowing of the leaf tip of garlic seedlings in a large area?

Garlic seedlings have a wide plant area and obvious economic benefits, but the phenomenon of yellow leaves will appear in the planting process, which is common in the production process, but if the yellow leaves occur in a large area, it will have a great impact on the yield of garlic seedlings. So what is the reason for the yellowing of the leaves of garlic seedlings in a large area? Let's get to know it.

1. Repeated cropping

Garlic should not be replanted for more than two years. Once continuous cropping exceeds two years, there will be degradation. Not only the yield and quality will be lower than that of one year, but also the leaf tip of garlic seedlings will turn yellow early, and then it will gradually spread upward, resulting in a large area of yellow leaves in garlic seedlings. Continuous cropping yellow leaves generally show weak root growth, for this case, on the one hand, it is necessary to topdressing fertilizer to promote root growth and development, and then to spray plant growth nutrient solution, such as 2003, Bihou, etc., which can also promote root growth and alleviate the phenomenon of yellow leaves.

2. Harm of underground pests

Common underground pests of garlic are root maggots, grubs, ground tigers, etc., they often bite off the roots of garlic, and even eat in the cloves, causing garlic cloves to rot, resulting in the occurrence of yellow leaves on the ground. In this case, 1000 times of dichlorvos and 50% phoxim EC can be used to irrigate roots and ramets, or 50% phoxim EC can be mixed into medicinal soil of one jin per mu, sprinkled between rows, and then irrigated to make the medicine seep into the ground with the water to control insect pests.

3. The phenomenon of withdrawing mother

The phenomenon of withdrawing mother is a normal physiological phenomenon, which indicates that the storage nutrition of garlic has been consumed and bolting is about to blossom. Therefore, before the garlic is sown for 30-40 days, 20-25 dry urea and 15-20 kg of potassium sulfate should be applied per mu, and 3-5 kg of special compound fertilizer for garlic can be added if possible. If you do not use chemical fertilizer, you can directly apply mature high-quality farm manure 2000-5000 kg per mu.

The above is a large area of garlic tip yellowing how to introduce, hope to help you, want to know more related knowledge, please pay attention to us.