Control methods of leaf roll moth

Leaf roll moth is a kind of insect, the adult is small, the forewing is wide, the larvae eat plant leaves or drill into the fruit to eat fruit, some roll the leaves into a tube, spinning cocoons inside, endangering fruit trees and other crops, commonly known as leaf rollers, distributed in Jiangsu, Anhui, Hubei, Sichuan, Guangdong, Guangxi, Yunnan, Hunan, Jiangxi and other provinces, the hosts are mainly sweet-scented osmanthus, tea, oak, camphor, citrus, persimmon, pear, peach and so on.

Morphological characteristics

The adult female is 10 mm long, has a wingspan of 23 mm and 30 mm, and has a light brown body. The antennae are filiform. The front wing is nearly oblong, light brown, the wing tip is dark brown, and there are many dark brown fine lines scattered on the wing surface, some individuals have a dark brown oblique transverse band in the middle, and the scales on the inner edge of the wing base are thick and protruding out of the wing. The hind wing flesh is yellow, fan-shaped, leading edge, outer edge slightly dark or most tea-brown. The male adult body is 8 mm long, the wingspan is 19mm 23 mm, the forewing is yellowish brown, the center of the base of the wing is dark brown, there is a dark brown round spot in the center of the leading edge, and the base of the leading edge has a dark brown nearly oval protruding, part of which is folded backward and covered at the shoulder corner. The hind wings are grayish brown. The egg is 0.8-0.85 mm long, flattened, oval and yellowish. The last instar larvae have a yellowish green body and a yellowish brown head. The forechest dorsal plate is nearly semicircular, brown, the posterior edge and both sides are dark brown, and there are 2 small dark brown oval horns on both sides. The pupa is 11-13 mm long, dark brown, with long gluteal spines and 8 hooks.

Recognition feature

Leaf curl moths often occur in spring and summer, harming the leaflets of begonia and root begonia. The larvae of the leaf roll moth bite on the new buds, tender leaves and flower buds, leaving only the epidermis in the shape of a mesh, and make the leaves curl longitudinally, which continuously harms the plants in the hidden leaves, seriously affecting the plant growth and flowering.

Prevention and cure method

The main results are as follows: 1. The adults have a strong tendency to sugar and vinegar. The adults hide in the back of the leaves or grass during the day and are active at night. When a small amount occurs, the rolled leaves can be removed manually and the worm will be pinched to death.

2. The leaf roll moth can be sprayed with 1000 times of phoxim (preferably at night) or 1000 times of trichlorfon.

3. The leaf roll moth was trapped and killed with sugar and vinegar solution during the adult occurrence period, which was prepared with 5 parts of sugar, 5 parts of wine and 80 parts of water, and then put the solution into a bottle and hung it around the potted begonia.

4. The control practice of leaf roll moth has proved that dichlorvos can not be used because it is harmful to cherry trees.