Control of cherry blossom leopard bark moth
Leopard beetle, also known as six-star bark moth, belongs to Lepidoptera, Leopard bark moth family.
Distribution and harm: it is distributed in Henan, Hebei, Shaanxi, Shandong and other provinces in China. Feed on a variety of fruit trees and flowers and branches with larvae.
Injurious: there is a feeding ring between the xylem and phloem at the base of the injured branch, and there is a wormway from bottom to top. There are several fecal holes on the branches and a large number of long oval insect feces are excreted. The upper part of the injured branch yellowed and withered, and it was easy to break in case of wind.
Morphological characteristics
Adults: the length of female moth is 20-38 mm, and that of male moth is 17-30 mm. There are 6 blacks on the back of the chest.
Color spots; the forewings are dotted with bluish blue spots of different sizes.
Eggs: oval, about 0.8 mm long, yellowish white at birth.
Larvae: 20-35 mm long, red. There are a pair of cotyledon-shaped black spots on the anterior edge of the anterior thoracic dorsal plate.
Pupa: reddish brown. During near Eclosion, there are two black spots on the side of each ventral segment and 10 spines at the end of the tail.
Life history and habits: one generation a year, and the mature larvae spend the winter in the injured branches. It pupated from April to May in the second year, and the emergence period of adults was from late May to mid-July. Each female can lay more than a thousand eggs. After hatching, the larvae enter from the main vein of the leaf or the base of the bud. Bite a row of fecal holes at intervals from top to bottom. One larva can be 2-3 harmful shoots. The larvae overwintered in the branches in the middle and late October.
Prevention and control methods:
Cutting off insect branches: combined with summer pruning, according to the symptoms of withered leaves at the tip of the new shoot or insect droppings on the branches and on the ground, cut off the insect branches in time and burn them centrally. This measure should begin before the larvae turn their shoots and be cut off many times until they are cut in winter.
Light trapping: light trapping is carried out during the occurrence of adults.
Chemical control: during the adult spawning and hatching period, spray 1000 times of 90% crystal trichlorfon or 1000 times of 80% dichlorvos EC.
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Occurrence and control of diseases and insect pests of cherry blossoms
Cherry blossom belongs to the genus Cherry of Rosaceae. It has the delicate fragrance of plum and the beauty of peach. There are hundreds of varieties. In recent years, with the demand of landscape architecture, cherry blossoms are widely used in gardens, adding a lot of beautiful scenery to urban gardens. However, there are many diseases and insect pests in cherry blossoms, which are mainly as follows: 1 the disease of cherry blossom sky dog nest disease is that most of the short and thin branches are like birds' nests from the injured parts, and there are only a few flowers or no blossoms on these branches. The number of leaves on the branches is large and small, and abnormal branches are added to the injured parts every year.
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Cherry blossom white stripe feather disease
The symptom of white stripe feather disease is becoming more and more serious in recent years, especially the cherry blossoms. The disease mainly occurs in the roots of trees, and the fibrous roots gradually spread to the lateral roots and main roots. The characteristic of the disease is that the diseased root is covered with a layer of gray silk mesh, and then the root decays, resulting in detachment of the cortex and serious loss of root absorption function. If the disease is mild, the cherry blossom grows poorly, the tree is weak, and the serious one causes death. Pathogen and regularity of disease the pathogen is Dematophoranecat
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