There are two main insect pests in the willow tree, Anoplophora glabripennis and Willowwood Cockroach Moth, which are difficult to control after being infested, resulting in weak tree vigor, dead branches, holes in the trees, affecting the appearance of the trunk, and in severe cases, the whole tree. death. Holes appearing on damaged trunks sometimes become habitats for other pests. According to the author's observation, there is a beetle that will avoid the holes in the trunk at noon on hot days, causing people to mistakenly believe that the hole in the trunk is caused by the beetle. The symptoms of the two locust pests are extremely similar. It is difficult to distinguish the larvae of the two insect pests from the culm of the trees and the wood chips. However, the larvae of the two pests are similar, but the colors are different, causing many people to think that the willows will harm the larvae. The dry insect is anoplophos, but ignores the dried moth. The following describes the recognition characteristics of the two pests as follows:
I. Classification and Damage Tree Species
Anoplophora glabripennis is a member of the order Coleoptera, Cerambycidae, and Gnatula. It is commonly known as buffalo and floribunda. It is mainly harmful to the willows, poplars, eucalyptus, etc. The larvae feed on the xylem of the trunk to form channels, making the material of trunks ridiculous and economical. reduce. Anoplophora glabripennis is a destructive pest.
Rhizome is a lepidoptera and wood-moth moth. It mainly affects willow, poplar, apricot, apricot, and ash, etc. The larvae drill the branches of trees and form irregular worms in the xylem, affecting the transportation of water and nutrients. , causing the tree to weaken and even the whole tree to die.
Second, the law of occurrence
Anoplophora glabripennis was born in Hengshui for 2 generations and wintered with larvae in the path of the infected treeworm. Willow sap begins to injure in spring, and phlegm will begin in mid-May, with a period of about 15 days. After the adult crawled out of the feathering hole, the young shoots were tenderized and the leaves were fed to supplement the nutrients, and then they were copulated. Prior to spawning, first bite an oval-shaped groove on the branches and then insert the ovipositor into the groove. Each groove produces 1 egg, and hatches the larvae in about 15 days. In general, the beginning of June is the beginning stage of adulthood, and from mid-June to mid-August is the emergence period of adult emergence. Adults do not have phototaxis.
In the Hengshui 2nd year, the dried wood cocoon moths took over 1 generation and larvae wintered in the trunk xylem and soil. The mature larvae that lived in the soil in the winter were pupaed in May of the following year. In the middle and mid-June, the adult ecloses began to emerge and became phototaxis. Adults laid eggs on the cracks of the bark, showing a massive shape. In late June, the larvae entered the bark and ingested them and infested them. In the bark seam, small brown wood chips were discharged. The young larvae feed on the phloem, and grow up and invade the xylem. In late October, larvae overwintered in the xylem of the xylem and continued to be affected in April of the following year. From late September to early October of the second year, mature larvae drilled holes and moved to the weeds under the trees, clods, and stone seams to cover the winter.
Third, the summary
Anoplophora glabripennis and C. chinensis had similar damage characteristics. They all bred larvae to the branches of trees. The main differences were as follows: (1) Anoplophora glabripennis belonged to Coleoptera, and adult adults had no phototaxis; R. henryi belonged to Lepidoptera and adults had phototaxis. 2 Anoplophora glabripennis spawns 1 egg in the oviposition trough, and L. edulis spawns in the bark seam, showing a massive, multi-grained appearance. (3) The larvae of the newly hatched larvae of A. quadricoptera are milky white, and the mature larvae are pale yellow and have no feet. The larvae in the trunk tunnel phlegm. The entire larval stage is in the trunk of the tree; the newly hatched larvae of the sapwood moth are pink and the mature larvae become Purple-red, full-footed, mature larvae migrated from the stem to the soil and spent the winter.
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