Commonly known as the native silkworm silkworm, is a polyphagous pest, feeding on a variety of crop seedlings, occurs every 3-4 generations, from late May to late August is the peak period. The larvae mainly suffered from serious damage to small larvae, resulting in large-scale cotton seedlings lacking seedlings and ridges, which had a great impact on yield. Several kinds of simple and effective methods of prevention and control are introduced to provide cotton farmers with local conditions and choose to use them.
First, weeding and exterminating weeds are the main sites for tiger eggs, and they are also bridges for larvae to migrate to cotton fields. Therefore, in the cotton seedling stage in combination with cultivating loose soil, remove field weeds, and bring the weeds out of the manure or burned. At the same time, the weeds around the cotton fields must be removed and the manure be used together to eliminate a large number of eggs and larvae.
2. The larvae of Tung Lobed Embryo Killing Tiger have a certain degree of tropism for Tung Tree Leaves. It is advisable for the older Tung Leaves to be soaked in water and placed on the field in the evening. 120-150 leaves per acre are placed on the next morning. Kestrel leaves capture larvae. Can also be used as a small branch of Yang Shuzhi, Yu Yu inserted in the cotton field to trap and kill adult, the effect is better.
Third, to capture larvae for more than 3 instar larvae, can be manually captured in the morning, when the discovery of new cut off the victim plant, the nearest excavation capture, continuous capture 5-7 days, can receive a certain effect.
Fourth, trapping adult worms can be used sweet potato 1.5 kilograms of cooked mash plus a small amount of yeast fermentation for two days, and then add 1.5 kilograms of water. Into a paste, the final addition of 500 ml of vinegar and 50% soluble trichlorfon 50 grams, stir and serve as a lure killer, placed in cotton fields in the evening, you can trap the adult tigers.
Fifth, poisonous soil insecticide with 50% of EC 0.5 kg of water and 25 kg of water sprayed with a sprayer on 50 kg of fine sand, while spraying while stirring, made of toxic soil. Sprinkle near the roots of cotton seedlings in the evening, the effect is better for larvae.
Sixth, poisonous bait slays 1 Uses 90% crystal trichlorfon 0.5 kilograms, adds 4 kilograms of water, spray mixes in the 50 kilograms mash up the fresh grass, makes the poison bait. In the evening near the cotton plant, the larvae can be killed. 2 Use 90% crystals of trichlorfon 0.5 kg, add 5 kg of water, spray and mix in 50 kg of crushed sautéed bran or cottonseed cake to make bait, slip in the evening near the cotton seedlings, with good Trapping effect.
Seventh, dusting control The larvae before the third instar can be sprayed to control the method, the use of 2.5% trichlorfon powder spray 0.5 kg per acre, can effectively control the tiger larvae.
8. Spray control: 90% crystal trichlorfon is used, and 120 grams of water and 50 kilograms of water per mu are used for spray control. Can also choose to use 50% enemies stomach 0.1 kg water 100 kg spray control, can receive better control.
Agricultural Chemicals refer to the inputs in agricultural production such as fertilizers, pesticides, veterinary drugs and growth regulators, their use can promote the production of edible agricultural products, in the sustained and rapid development of agriculture plays an important role. Agrochemicals can be divided into 3 categories: chemical fertilizer, pesticide and agricultural film.
1. Chemical fertilizer is the abbreviation of chemical fertilizer. It refers to the fertilizer made by chemical and/or physical methods containing one or more nutrient elements needed for the growth of crops. It is mainly used to improve soil fertility and increase the yield of crops per unit area. Nitrogen fertilizer, phosphate fertilizer and potash fertilizer are the most common fertilizers.
2. Pesticides refer to all kinds of germicidal, insecticidal and herbicidal drugs used to promote and protect the healthy growth of crops. Pesticides play an active role in agricultural production and play an important role in the comprehensive control of plant diseases and insect pests.
3. Agricultural film is mainly used for mulching cultivation technology, which contributes greatly to the increase of agricultural yield and income and the production of off-season crops.
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