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The tea moth Linoclostisgonatias Meyrick is an important pest of insects, Lepidoptera, and Xyloryctidae of the family Xyloryctidae. It is also known as a sandworm, a tea tree terrier. In the old tea tree harm, the main harm in the upper branches of the tea tree, and because it uses feces and spit silk to adhere to the strips and piles at the harm of the tea tree, it is named the tea pile sand moth.
In the past literature, this species only harmed tea trees, camellia oleifera and acacia trees. In recent years, the newly found hosts are cinnamon, lychee, mango, apple, star fruit, fig, star anise, ren bean, gemu, magnolia, autumn maple, Taiwan acacia, hawthorn, sheepshoe nail, yellow wax plum and so on. The tea moth has become an important omnivorous pest. Due to its repeated long-term harm on the trunk of the host tree, it continues to increase the wound, gradually affecting the plant growth, and also affecting the yield and quality of the host.
Tea moths occur once a year. Its adults feather between April and May, lay eggs on the host leaf after mating, and then hatch larvae at the spawning site. The hatching larvae can spit silk to collect the leaves, inhabit the inner bite leaf, the initial bite of the epidermis gradually to eat the leaf flesh, the middle and late 3 years of age to leave the leaf tips, down to the trunk, choose the appropriate part, first bite the cortex, build a nest, and then until the middle and old larvae are spent in the trunk skin layer, xylem sapwood, and complete the cocoon pupa, adult feathering process. Larval moths often enter from the main trunk or from forks of thick branches, or from rough trunk scars. It bites the bark of the tree, gradually forming a tunnel from a small pit, which continues from the outside to the inside.
Important features
It uses excreted feces, mixed with wood chips debris, bonded into different sizes of clumps with spit silk, and accumulates into irregular strips, blocks or small piles around the worm passage, the shape is extremely irregular, all bonded around the worm passage, not easy to fall off and the most is piled together, and its fecal debris clumps are small as the size of fingers, and the large one is even wider than the palm area, which is the origin of "sand heaping". This is in clear contrast with the more standardized tunnels of some dried moths such as Acacia wood beetle moth Arbelabailbarana Matsumura, lychee wood beetle moth Arbeladea Hoe, etc. The moths on the trunks of the latter two are relatively uniform, continuously extending forward, not piling up, not different sizes, and fecal debris is also more delicate.
The mature larvae of the tea moth are 16–18 mm long, with a russet-brown head, a black-brown dorsal plate for the forech, a reddish-brown dorsal plate on the middle thorax, a white dorsal plate and abdomen on the posterior thorax, and reddish brown and yellow-brown markings on each abdominal segment, and are intermittently connected in a longitudinal line. There are 6 black dots on each abdominal segment, 4 forward and 2 in the back row, arranged in 2 rows. Adults have wingspan of about 16 mm, body length of about 9 mm, white body, white forewings, silvery white hindwings, and glossy. The antennae of female adults are filamentous, and the antennae of male adults are feathery.
In the pests similar to the tea pile sand borer moth on the trunk, as well as the lychee wood beetle moth and the acacia wood beetle moth, in addition to the above difference in the shape of the worm road, due to the easy encounter with larvae or pupae in the survey, their main characteristics are: the old mature larvae of the lychee wood beetle moth are 26-34 mm long, which is the longest of the three; the body is pitch black, and the abdominal nodes are gray-white; its pupae are 14-17 mm long, dark brown, and there is a slightly forked large protrusion at each end of the head, and the tip of the protrusion extends to the front of the abdomen. The old mature larvae of the acacia wood beetle moth are 18-27 mm long, between the tea pile sand borer moth and the lychee wood beetle moth; the head is russet brown, the body is pitch black; the pupae is 12-16 mm long, ochre yellow, and there is a large protrusion without bifurcation on each side of the head, and the direction of growth is parallel to the body's long axis. In terms of insect taxonomy, these two species belong to the Samebelidae family of Lepidoptera, but are not the same as the Tea Pile Sand Moth.
Prevention and control methods
1
Destroy nests and exploit predators
A class of pests such as the tea pile sand moth uses fecal debris to build insect passages The biggest role is to prevent the invasion of natural enemies. The insect buds and insect passages with low trunks are torn directly by hand, and the high parts are swept away with bamboo poles (or broomsticks). Spiders and ants that can prey on larvae after the tunnel is cleared can quickly find the larvae and automatically enter the cave to catch them; or because the opening of the wormway is mostly in the recess, whenever it rains, the larvae are also drowned by the rain because the building is not closed in time.
2
Manual assassination prevention
Use a thin wire to repeatedly puncture the wormhole, when you feel some resistance or elastic feel, you can achieve the purpose of stabbing the larvae in the hole. Hunt at night. Every summer and autumn, during the period of continuous extension of the worm road and the increasing amount of new feces, after 8-9 o'clock in the evening every day, the worm passage on the skin of the trunk can be stripped, when the larvae are active or feeding on the bark, and the larvae can be killed. Clean up severely weakened plants or branches. Those with high insect mouths and severe decline of plants can be cut down and transported out of the forest to burn.
Angen team tips: When the above-mentioned dried moth pests occur, if it is not determined what species, as long as it is determined that it is the larval stage (usually summer and autumn), the method of controlling the tea pile sand moth moth can be applied, which can also achieve the purpose of controlling other dried moths.
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