Scientific name Homona coffearia Meyrick Lepidoptera, Polygonaceae. Synonyms cQ//60n. o Niether. Alias ​​brown leaf roller moth, yellow leaf roller moth, tea yellow leaf roller moth, citrus long roll moth and so on. Distributed in Jiangsu, Anhui, Fujian, Hunan, Sichuan, Taiwan, Guangdong, Guangxi, Yunnan, and Tibet, the density is higher south of the Yangtze River. The list of agricultural pests in China is also recorded in North China.
In addition to harming the tea tree, the host also harmed oil tea, citrus, coffee, litchi, chestnut and so on.
Characteristics of the larvae The larvae are covered with buds on the shoots, and the leafy meat is eaten, leaving a layer of epidermis, forming a clear and dead spot, followed by an increase in worm age, an increase in the amount of food leaves, and up to 10 leafhoppers. Leaves, eaten into leaves, old leaves.
Morphological characteristics Adult body length 6-10mm, wingspan 16-30mm, dark brown, dark brown scales on the top of the head, lips bent up to the front of compound eye. The base of the forewings is dark brown, with a medium-brown dark brown color diagonally from the leading edge to the rear edge, and the apex is often dark brown. The hind wings are light yellow. The female fins are longer and exceed the abdomen; males only cover the abdomen for short, and the front wings have short, wide front pleats. Egg oval, 0.8mm long, pale yellow. Larvae body length 20-23mm, head and chest shield dark brown to black, the head and the front of the chest are connected with a wide leucorrhea, body yellow to gray-green, front midfoot, chest black, hind foot light brown, with Hips. The dragonfly is 8-12mm long, yellow-brown.
Life habits Four generations in North China, Anhui, and Zhejiang, four to five generations in Hunan, six generations in Fujian and Taiwan, all larvae wintering in leafhoppers. The overwintering larvae in Anhui were pupaed and feathered in April and April. The 1-4 larvae occurred in mid-late and late May, late June and early July, late July and mid-August, mid-September and early April respectively. . From June to July in Guangdong, the average temperature is 28°C, the egg period is 6-7 days, the larval period is 17-30 days, the flood season is 5-7 days, and the adult period is 3-8 days. The completed generation lasts for 3L-52 days. Larvae are 6 instar. One instar 3-4 days, second instar 2-4 days, third instar 3-5 days, fourth instar 2-4 days, fifth instar 2-5 days, sixth instar 4-9 days. Individually appearing 5 to 9 days old at 7th instar, the larvae tend to be tender and lively when young, and they will jump and land when they are frightened. Adults lurk in the tea bushes during the day and are active at night. They have phototaxis. They often produce egg masses on the leaves. Each female lays an average of 330 eggs, arranged in squamas and covered with colloidal membranes. Two can be produced per female. More densely populated tea gardens occurred. May-June wet weather occurred. Autumn drought occurs lightly. The main natural enemies include the Australian Trichogramma, Crimson Bee, Armor, and Spider.
Control methods (1) Pruning branches in winter, removing litter and weeds, and centralizing treatment to reduce the source of insects. (2) Remove the egg masses, insect pests, and leaf clusters, and place the natural enemy protection device. (3) Protect and use natural enemies. (4) During the spawning period of the 1st and 2nd generation adults, Trichogramma dendrolimi was released. The bees were placed 3-4 times in each generation, every 5-7 days, and the number of bees was 25,000 per 667m2. (5) Chemical control Spraying of insecticidal bacteria during the flowering stage, each g containing 100 million spores 1000 times, if mixed with 0.3% tea dried or 0.2% neutral detergent can improve control efficiency. In addition can be sprayed white beetle 300 times or 90% crystals of dipterex 800-900 times, 50% dichlorvos 900-1000 times, 50% killer pine EC 800 times, 2.5% Kung Fu EC 2000- 3000 times liquid.
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