Reminder of current garlic management details

According to the relevant data, the growth of all parts of garlic plant is the largest in this period, so this period is also the critical period of water and fertilizer demand of garlic plant. Especially nitrogen fertilizer and potassium fertilizer, if lack of nitrogen or potassium will cause great loss to the yield at this time.

It was also reported that there was a significant positive correlation between garlic maximum leaf width, pseudostem diameter (leaf sheath) and garlic bolting and garlic head weight. In order to obtain high yield of garlic and garlic bolts, it is necessary to cultivate plants with strong leaf sheaths and broad leaves, so ensuring that the garlic is free from diseases and insect pests is also an important measure to ensure high yield.

After consulting Master Chen of Cangshan garlic Base, the author summarizes the following specific measures for reference.

The main results are as follows: 1. The application of nitrogen fertilizer at seedling stage should be sufficient. In the first ten days of April, combined with watering, topdressing based on nitrogen and sulfur should be re-applied to improve soil fertility and root growth activity.

According to Master Chen, about 30 kilograms of nitrogen and sulfur fertilizer can be applied per mu, which can be spread or flushed, and attention should not be paid to excessive application of pure nitrogen fertilizer such as urea.

2. Prevent the apprentice from growing up and make the tree strong. With the increase of air temperature and the sufficient supply of fertilizer and water, the growth rate of garlic plant is obviously accelerated, and it is easy to grow, which makes the garlic plant taller and the leaf sheath thinner.

At this time, garlic nutrition agent should be sprayed in time to increase the thickening agent of garlic leaf sheath, so as to coordinate the relationship between vegetative growth and product organ growth, and restrain the excessive growth of vegetative body. In order to meet the requirements of high yield of garlic for plant type, to achieve the management purpose of thick leaf sheath and wide leaves, and to lay a material foundation for the full growth of garlic head.

3. Re-apply potash fertilizer when the head of garlic is inflated. In late April (mostly around "Grain Rain"), 20 kilograms of 30% sulfur and high potassium compound fertilizer can be applied with the water to accelerate the expansion of garlic. In order to prevent garlic root aging at this time, it is necessary to keep root and protect root in production, strictly prevent root injury and greatly affect the yield. The time of watering and fertilization should not be later than 5 days before the harvest of garlic bolts at the latest.

4. White rot and leaf blight. Garlic white rot is easy to occur and prevail 3-5 days after watering during the Qingming Festival. Garlic leaf blight is the main disease of garlic leaves, which is in the most vigorous period of garlic growth (late April).

Practice has proved that the best period for the prevention and control of the disease is to spray fungicides such as Baifujing or prohydantoin 2-3 days after watering, with a general dosage of 100-150 grams per mu. Pay attention to the need to spray once before pouring fat and water on the expansion head, and use it for 2-3 times in a row.

5. Pests should be protected against ground maggots and mites. The damage of garlic maggot larvae has occurred in early April, so it is necessary to combine watering and irrigation to control both garlic mites and nematodes, and the effective drug is phoxim, so it is effective to kill both maggots and mites.

The use of highly toxic and residual pesticides is prohibited to ensure the food safety of garlic bolts and garlic heads.