Organic agriculture refers to an agricultural production system that does not use synthetic fertilizers, pesticides, growth regulators and feed additives. The development of organic agriculture is a new type of agricultural model that complies with the sustainable development of agriculture. As no artificial synthetic pesticides can be used in the production process, pest control has become a key task in the production of organic tea. The common pests and diseases and their prevention and control measures are as follows: 1. The false green eyes. Adults are yellow-green to green, and adult larvae and nymphs suck tea shoots to harm the shoots. The yellow leaves of damaged tea leaves have yellowed leaves, their veins turn red, the growth of buds is blocked, and new shoots do not develop. In severe cases, the young shoots appear to be scorch-like until the tea plantation is harvested, seriously affecting the yield and quality of tea. Every year in June and September to October is the peak period. The nymphs and nymphs are inactive on rainy days and morning dew, and when the weather is clear, rainy, reserved and overgrown tea plantations are conducive to the occurrence of this worm. Prevention and control measures: (1) Strengthen the management of tea gardens and remove weeds timely; (2) Suppress the development of eggs by timely extraction of tea or light shearing in batches; (3) Spraying 0.1-0.5 billion spores/ml of Beauveria bassiana or plant sources in humid weather. Pharmaceutics are used for prevention and control; 4 When heavier, lime is used to seal the garden in winter to prevent adults from overwintering. 52.50% rotenone 150-200 ml (300-500 times) was sterilized. 2, tea caterpillars. Adult female moths are pale yellow-brown, male moths are dark brown, larvae are brown, and yellow poisonous hairs appear on the back and sides. The larvae are clustered. After the third instar, the larvae disperse and damage, and the leaves are nicked after biting. Adult phototaxis, pests have four peaks in April and June and July to September. Prevention and control measures: 1 Manual removal of egg masses and insects in winter each year; 2 Combining tillage and deep-buried grasshoppers; 3 Adult killing of males with light or sex hormones; 4 Spraying bt preparations in young larvae. 3, tea feet. Adult wings are gray and white, and larvae feed on young leaves to injure the tea tree. When the damage is severe, the young leaves, old leaves, and even tender stems can all be eaten. This not only seriously affects the tea production in the current year, but also leads to declining tree vigor. It is difficult to recover in one to two years. , a great threat to tea production. Its larvae have drooping drooping characteristics and adults have phototaxis. Preventive measures: 1 Combine autumn and winter cultivation to bury or exterminate worms; 2 Displace chickens and insects; 3 Light traps and kill adults; 4 Use sex pheromone to trap males and interfere with mating; 5 Spray tea locust virus preparations; 6 At larvae Spray bt preparation prevention and treatment. 4, Teat moth: Adults are dark brown, strong phototaxis. Eggs spawn in tea bushes and larvae feed on the leaves. The generation of larvae of each generation is in late May to early June, mid-July, late-September and mid-September. Prevention and control measures 1 Use of the adult's pseudo-dead, artificially killed after the earthquake; 2 spraying Beauveria bassiana; 3 deep plowing in winter to reduce the number of overwintering insects. 5, orange tea and tea leaves. Tea orange pods are carrot-shaped, orange-red, tea leaves are oval, purple black. Chengyu sucks leaf and leaf juice with needle-like mouthparts, which mainly damages young leaves. The main vein of the victim is reddened, brown rust spots appear on the back of the leaves, the luster is lost, the buds are atrophic, and rust spots appear. The leaves are brittle and cracked, and the leaves are seriously damaged. . Summer tea suffered the most, followed by autumn tea. High temperatures and droughts are conducive to its occurrence. Preventive measures 1 Timely multiple tea picking in batches, can inhibit the further development of the pest; 2 spraying Liuyangmycin; 3 heavy years, can spray 0.01-0.02 degrees lime sulfur and sulfur suspension agent, spray leaves Shi. 6, black thorn whitefly. Adults are gray and fly. Larvae are the main pests of black tea aphids that harm the tea tree. Nymphs parasitize the sap at the back of the leaves, secrete excrement at the same time, fall to the front of the lower leaf, induce tobacco mold, hinder photosynthesis, weaken the tree vigor, sparsely sprouted leaves, dry up the branches and leaves, and cause the tea tree to die. The worms are greeted with weeds, and there is a large area in the tea plantations of young green tea growing in the lower leaves of the tea groves and in tea gardens in the several years after the taiwan. In the tea groves, there are many in the middle and less in the upper part. Control measures: 1 timely pruning, thinning, cultivating and weeding, making the tea gardens airy and transparent, can reduce the amount of its occurrence; 2 spraying the black locust powder fungus preparation 500 times liquid, or manually remove the damaged tea branches; 3 pay attention to protection Black locust powder mistletoe; 4 sprayed with 0.5 degree lime sulfur on the back of the tea. 7. Tea anthracnose: It is the most commonly occurring disease in tea gardens. It is caused by pathogenic fungi that cause disease. When the disease occurs, it is mainly harmed into leaves. First, it produces water-stained yellow-brown dots at the tips of leaves and leaves. Spots turned from brown to yellow, and finally gray. The lesions are semi-circular or irregular, with many small black dots scattered later. Every year during the peak period from May to June and from September to October, tea gardens with weak tree vigor, extensive management, excessive picking, frost damage, and heavy insect pests are prone to occur. Prevention measures: 1 Strengthen the management of tea gardens, reasonably apply fertilizers, prevent and cure insects, and improve the disease resistance of tea gardens; 2 Clean up diseased leaves in time to prevent the spread of germs; 3 Spray 0.6%-0.7% lime half Bordeaux fluid before germination to prevent its occurrence.
