The Laoshan District of Jiujiang City is the main producing area of ​​Laoshan Yunwu Tea. In recent years, several unharmful tea gardens have been established one after another. Tea gardens are produced and managed in accordance with pollution-free standards. The relevant technical points are summarized as follows: 1. Strengthening agricultural control and optimizing ecological environment 1. Breeding resistant varieties: When selecting varieties, besides considering the quality level of the products and the adaptability of tea, they should also consider the major pests and diseases of the local area. The degree of resistance. For example, the varieties used in Laoshan Yunwu Tea Region are: Longjing 43, Shangmeizhou, and Laoshan populations, etc. They have good quality, high yield, and strong pest resistance. 2. Reasonable pruning and Taiwanese pruning: pruning and Taiwanese pupae have inhibitory effects on many tea pests and diseases. Pruning is divided into light trimming, deep trimming and heavy trimming. The trim depths are 3-5 cm, 10-15 cm and 40 cm from the ground. Light pruning can cut off the pests that accumulate on the surface of the tea crown, such as tea locust, tea bud moth, tea pod, and tea orange pod, and can be carried out before and after seizures in early spring each year. Deep pruning and heavy pruning are determined according to the actual situation. For tea plants seriously damaged by tea caterpillars, tea worms, and clams, tortoise shells, etc., deep shearing and heavy shearing should be adopted in time, and even thorough prevention and treatment of cercariae should be carried out. Tea gardens should be promptly cleared and destroyed. 3. Combination of fertilization and deep plowing: At the same time, basal fertilizer is applied in tea plantations and deep plowing in cultivators. Every September-October, deep plowing 30 cm between the tea, roots cultivated 5-7 cm, while the application of fully matured organic fertilizer. Deep plowing can cause the death of overwintering pests and pathogens in the topsoil and the litter layers, which can be buried deep in the soil. In addition, timely picking, drought and moisturizing, Shuzhiqingyuan and other agricultural measures can also reduce the occurrence of pests and diseases in tea gardens. Second, the application of physical control, reduce pest density 1, light trapping method. The species with strong phototaxis in the tea plantation are: tea scaleworm, tea caterpillar, teat moth and tea spot moth. The best lighting lure effect is Dongfanghong electronic moth killing lamp, Jiaduo vibration type insecticidal lamp and black light lamp, followed by fluorescent lamps and incandescent lamps. Each year during the occurrence period of pests, the Dongfanghong insecticidal lamp is loaded every 50-60 mus, and 20-30 watts of black light are loaded every 10 mus. The culling and killing are performed according to the types and quantities of insect pests to be hunted and analyzed. 2, addiction trapping method. Pests are used to seduce the tropism of different colors, such as the larvae of the larvae of the tea-footed larvae, yellow-green, green-yellow tea, yellow-green, dark-green pods, green tea, and small green-leaved caterpillars. Sex. You can install papers with pest-loving colors in the tea garden line. Collect pests on paper in time to kill them, or apply contact-killing pesticides on the paper. 3, artificial killing method. Manual hunting is a traditional method of killing, using pest habitats or special habits to kill. For example, tea caterpillars piled on eggs and piled over the winter in tea leaves. The overwintering egg masses were removed from November to March of the following year. Their larvae were clustered on the back of the leaves 1-2 years old. Branches with insects cut off and stepped on the ground. Another example is the cockroach moth, which is often the center of damage, and has obvious harm. It can be managed in the winter or early spring in conjunction with the tea garden and remove the insect sac. There are still many insect habits to be developed and utilized, such as the use of insect sex hormones. Third, the promotion of biological control, the use of natural enemies 1, beneficial insects to treat pests. For example, T. velutipes control has better control effects on tea-footworm and tea-fine moth, black-egg beetle control tea-caterpillar, red dot-lip beetle, and white-colored beetle-control catfish lice. 2. Treat pests with beneficial microbes. The common preparations of Beauveria bassiana, Bacillus thuringiensis, Apochaera, and Chaetoplasma nuclear polyhedrosis virus are widely used. IV. Restricting chemical control and achieving pollution-free production In the production of pollution-free tea, chemical control methods should be determined according to different types of pollution-free tea. 1, green food grade A tea garden. In the prevention and control of pests and weeds, the use of chemical pesticides should be reduced through agricultural control, biological control, and physical and mechanical control. At the same time, the use of chemical pesticides should be restricted. The use of pesticides to do: 1 rational use of pesticides; 2 safe use of pesticides; 3 improve the use of pesticides. Disinhibition of highly toxic, highly toxic, high-residual pesticides and pesticides that have been banned by the Ministry of Agriculture, such as methamidophos and dicofol, are prohibited. 2, green food AA grade (organic tea or tea export) tea garden. During the production of this tea plantation, the use of any artificial insecticides, fungicides, herbicides, growth regulators, and adjuvants is strictly prohibited. Only limited use of plant-derived pesticides, microbial pesticides, mineral-origin pesticides, and animal-derived pesticides is permitted. Common plant-derived pesticides include rotenone, alizarin and nicotine. Microbial-sourced pesticides include polyoxomycin, Bacillus thuringiensis, tea-footworm and tea caterpillar NPV. Mineral-origin pesticides include copper sulfate, Bordeaux mixture and lime sulfur.
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