Scientific name Casmara patrona Meyrick Lepidoptera, Gnatidae. Alias ​​is also known as tea stem borer, tea tree branch moth, tea leaf stem beetle, tea leaf weevil. Distributed in Jiangsu, Anhui, Zhejiang, Fujian, Jiangxi, Henan, Hunan, Guangdong, Sichuan, Guizhou, Yunnan, Hubei, and Taiwan. Host tea tree, camellia. The characteristics of the larvae attack the branches from the top to the bottom, resulting in hollow tea branches, withering shoots, dry, long time, large branches often pruned dead or broken. Seriously affect the yield and quality. Best Puzzle Board,Jigsaw Puzzle Case,Jigsaw Puzzle Board,Portable Puzzle Board Eastony Industries (NingBo) Co., LTD. , https://www.eastony.com
Morphological characteristics Adult body length 15-18mm, wingspan 32-40mm. Body, wing tea brown. Antenna yellowish white filamentous. The lower lip must be long and bent. The fins are nearly square, with a red band along the outer edge of the front wing leading edge. The outer edge is grayish black and the inside has a large khaki spot. The central spot has a narrow triangular black belt pointing to the top corner, followed by grayish-white lines. Two black-brown spots with red raised plaques near the middle of the wing. The hind wings are grayish brown. There are white bands on each section of the abdomen. Egg length lmm, horse teeth, light beige. The last-instar larvae were 30-40mm in length, with small heads and yellowish-brown heads. The central larvae had a light yellow "human" shape pattern with a slightly enlarged chest. The chest and mid-thoracic back plate are light yellow-brown. There is a raised white sarcoma on the back of the chest and mid-chest. The back and the abdomen are white, the back is light red, and the abdomen is dark brown. It is 18-20mm long, long cylindrical, yellow-brown, with 1 pair of protrusions at the end of abdomen.
Habits are born one generation old, with mature larvae wintering in the affected branches. The overwintering larvae in southern Anhui and Changsha, Hunan, pupa after mid-April in the following year, entered the peak of phlegm in mid-May and mid-May, and copulated after adult emergence in late May and July, and entered the peak of eclosion in the middle and early June, 6 The larvae bloomed at the end of the month and began to see dry shoots after early August. The egg period in Anhui is 10 to 23 days, the larval period is 290 to 310 days, the flood period is 30 days, and the adult's lifespan is 4 to 10 days. Adults like to feather in the afternoon or night, concealed in the tea during the day, activities at night, a phototaxis. After mating, the adults lay their eggs between the shoots of 1-6 shoots, producing granules and l grains at each site. The newly hatched larvae drilled into the coleoptile from the leafhopper and drilled downwards. Five to four days later, the tips of the shoots began to wither. The l-2 instar larvae infested the twigs. After the third instar, the twigs entered the side branches or the trunk and were damaged. Near the ground, there is a row of 3-5 drain holes in the shade of the branches of the branches. The larvae inhabit the bottom of the next hole and often discharge cylindrical manure and wood chips from the hole. The length is 2-3mm. The larvae are in the insect path. Very lively, before the mature larvae phlegm and bite a feather hole in the 1/3 branch of the tea branch from the branch, the emergence hole is nearly circular, diameter 3.5-5mm, and then in the hole insect road spinning In it. The management of extensive tea gardens, old tea trees, and debilitated tea gardens is a heavy victim. In addition, the arborous arborous cultivars suffer less damage than the shrubs.