Causes and solutions for large-scale yellowing of garlic sprout leaf tips

Garlic sprouts have a wide planting area and clear economic returns, but yellow leaves can appear during the growing process. This is common in production, but if yellowing occurs over a large area, it has a huge impact on garlic sprout yield. So what causes large-scale yellowing of garlic sprout leaf tips? Let's learn about it together.

1. Continuous cropping

Garlic should not be continuously cropped. Generally, continuous cropping should not exceed two years. Once continuous cropping exceeds two years, degeneration will occur. Not only will yield and quality decline year after year, but the leaf tips of garlic sprouts will also turn yellow early and then gradually spread upward, causing large-scale yellow leaves in garlic sprouts. Yellow leaves caused by continuous cropping generally show weak root growth. For this situation, on the one hand, topdressing is needed to promote root growth and development; on the other hand, plant growth nutrient solutions such as 2003 and Bihu can be sprayed, which can also promote root growth and alleviate yellowing.

2. Damage from underground pests

Common underground pests of garlic include root maggots, white grubs, cutworms, and others. They often bite off the garlic root system and may even bore into the garlic cloves, causing the cloves to rot, which leads to yellow leaves on the aboveground parts. For this situation, you can use 80% dichlorvos 1000-times solution, or 50% phoxim emulsifiable concentrate 800-times solution to drench the roots and split plants, or use 50% phoxim emulsifiable concentrate at one jin per mu mixed into medicated soil, broadcast it between the rows, then irrigate so the pesticide infiltrates into the ground with the water to control the pests.

3. Mother bulb degeneration

Mother bulb degeneration is a normal physiological phenomenon. It marks that the stored nutrients of the seed garlic have been used up and that bolting and flowering are about to occur. Therefore, 30-40 days after garlic sowing, before mother bulb degeneration, 20-25 kg of urea and 15-20 kg of potassium sulfate should be topdressed per mu. If conditions permit, 3-5 kg of special compound fertilizer for garlic can be added. If chemical fertilizers are not used, 2000-5000 kg of thoroughly decomposed high-quality farmyard manure per mu can be applied directly.

  The above is an introduction to what to do when garlic sprout leaf tips turn yellow over a large area. We hope it can help you. To learn more related knowledge, please stay tuned to us.