What are the technical measures for preventing and controlling the roots of leeks?
The root of leeks is referred to as quail, and the adult is called larvae. The larvae infested the non-vegetated underground stems and the tender stems, causing damage and rot. The stems and leaves of the shoots turned yellow and died. Generally, there are three major damage periods each year, from early April to late May, early June to mid-July, early July to late October, of which the third is the most hazardous. Prevention technology is described as follows:
First, reasonable fertilization and chemical treatment Organic fertilizer less nitrogen fertilizer, increased phosphate fertilizer. Because adult worms prefer to eat raw materials, the organic fertilizer is applied to the field every time after the decomposed organic fertilizer is applied. Each cubage of organic fertilizer uses 20-30 ml of dimethoate, 10-15 kg of water, and is mixed for 24 hours.
II. Irrigation of insects Winter or spring irrigation can eliminate some of the larvae and reduce the damage.
Third, the spray control of adult eclosion in adulthood, with 2.5% green kumquat 3000 times solution, in the morning 9 to 10 evenly spray, 10 days 1, even spray 3 to 4 times. Kill adults and reduce spawning numbers.
IV. Pharmaceutical application
1. It was found that the tip of the leek was yellow, and when the plants were scattered, the sprayer that unloaded the sprayer was sprayed into the root of the leek at the rate of 200-250 ml per acre with 200-250 ml per mu, and it took effect in 3 to 5 days. Validity period is 25-30 days.
2, with the irrigation water application, per acre with 48% Lothian 300 ~ 500 ml against the right amount of water made of mother liquor, and then in the water inlet slowly into the water stream, so that with the water poured into the root of chives. This method is simple and labor-saving, but it is necessary to increase the dose. The music period is a pollution-free pesticide and it is safe to eat. You can market it by cutting it 14 days after filling.
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