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Prevention and Control of Tea Tree Tea Moth
Scientific name Ca10ptilia theivora (Walsingham) Lepidoptera, Phrynoridae. Alias ​​trifoliate leaf roller moth, curtain hole moth. Distribution of Jiangsu, Zhejiang, Anhui, Jiangxi, Fujian, Taiwan, Hunan, Guangdong, Guizhou, Yunnan, Shandong. The characteristics of the larvae are larvae in the young leaves of the tea tree or rolled into a triangle to hide and feed, affecting the yield of tea. The mixed rate of triangular radon is higher than 3%, which affects the quality of tea. Morphological characteristics Adult body length 4-6mm, wingspan 10-13mm, head, chest dark brown, compound eyes black, yellow hair face. Antenna filamentous, brown. The front wing has a lustrous brown luster and a golden yellow triangle pattern near the center has reached the front edge. Dark brown hind wings, long hair. Egg length 0.3-0.48mm, flat oval, colorless, with a drop-like luster. The last instar larvae have a body length of 8 to 10 mm. The larvae have 5 instars: 1 instar 1 mm, 2 instar 1.5 to 2 mm, 3 instar 2.5 to 4 mm, and 4 instar 8 to 10 mm. The larvae are milky, translucent, mouthparts brown, monocular black, body surface with short white hair, younger stage body is slightly flat, head small chest is large, the abdomen is gradually thin from the front, the posterior body is cylindrical, can see dark green to purple black Digestive tract. 5-6mm long, cylindrical, light brown. Ventral and wing buds light yellow, compound eyes red brown. The dragonfly is 7.5-9mm long, long oval, grayish white. Living habits 7 generations of Zhejiang, the wolfberry in the lower part of the tea tree into the old leaf depression or overwintering. In spring of April, the adult eclosion spawns, the first generation of late April, the second generation of late May, the third generation of late June to early July, the fourth generation of late July, the fifth generation of late August, and the sixth generation of late September In the first half of the month, in the mid-November of the seventh generation, generations overlap after four generations. Adults are active and copulate at night and have phototaxis. Two to three days after emergence, the eggs were laid on the back of young leaves, the second leaves were the most under the buds, followed by three leaves, few on buds, and the number of grains on one leaf was several tens to several tens of eggs. 44-68 tablets, more than generations less. The first and second instars are the leaf stage, the third and fourth instars are the crimping stages, and the fourth and late instars and the fifth instars enter the rolling stage. The tip of the leaf is rolled into the leafhopper back to the triangle insect's nest, hiding the Suizhongju leaf feeding meat. The larvae often turn to earthworms and pile up the feces in the earthworms, seriously affecting the quality of tea. After the mature larvae crawled out of a hole in the bite, the old leaf or the back of the leaf was rewheated. The egg period of 3-5 days, 9-40 days larvae, non-overwintering 7-16 days, the adult life of 4-6 days. There are many buds in the retired tea gardens and young tea gardens, which will take place. Every summer is heavy. Temperature rises above 28°C, adults are more likely to die, spawning is less, and lighter damages occur from July to August. The main natural enemies are cone-bellied wasps. The parasitism rate is about 20%. Prevention methods (1) Collect tea in batches, pay attention to the removal of insect leaves, and reduce the spawning sites and foodstuffs of the insects. (2) Strengthen management of tea gardens and find that insects are removed in time and burned or buried deeply. (3) Spray 50% phoxim EC 1200 times or 80% dichlorvos EC 1000 times, 90% Bataan WP 1500 times, and 20% fenvalerate EC 4000-5000 times in the leaf stage. .