Cerambycidae are herbivorous insects, most of which are pine, cypress, willow, elm, walnut, citrus, apple, peach and tea, and some are cotton, wheat, corn, sorghum, sugarcane and hemp.

In the larval stage, longicorn beetles can eat the trunks, branches, stems or roots of willow, acacia and fruit trees.

Long-horned beetles have different habits of using pollen, tender bark, twigs, leaves, roots, tree juice, fruits, fungi and so on according to different species in adult stage.

For domestic longicorn beetles, you can also provide them with apples, walnuts, oranges, tea, corn, sorghum, wheat, sugar cane, honey and other foods. In a word, longicorn only eats plants without variation.

Prevention methods of longicorn beetles:

1, quarantine

It is strictly forbidden to introduce dangerous longicorn beetles from abroad, outside the province, cities and counties through logs, packaging wood and trees with insects.

2, insect-resistant tree species

The resistance of different garden tree species and varieties to longicorn beetles is significantly different, so the tree species or varieties with less harm to longicorn beetles should be selected.

3. Strengthen garden management.

Combined with pruning, timely cut off and deal with dead branches with insects; Trees with weak growth are vulnerable to the harm of longicorn beetles, so forest management should be strengthened to promote the vigorous growth of trees and reduce the harm. Monochamus alternatus and other trees that like to endanger dying or dead trees should be cut down in time every year before the adults fly out, and the dead trees in the forest should be thoroughly cleaned and treated.

4, planting bait trees to trap and kill

Adult longicorn beetles have a strong selectivity for tree species because they have to eat bark to supplement nutrition. We can use this habit to plant a certain number of bait trees to lure adult longicorn beetles, and carry out chemical or artificial control and adult occurrence monitoring.

Such as mulberry longicorn on Broussonetia papyrifera, Zheshu and mulberry; Anoplophora glabripennis and Platanus acerifolia; Anoplophora glabripennis on maple trees such as sugar maple; The effect of Anoplophora yunnanensis on Rosaceae (such as Tangli) and Fraxinus chinensis; Peach-red-necked longicorn beetles have a strong tendency to elm trees, etc. Pruning elm trees in June-August and cutting the mouth to shed glue can attract a large number of red-necked longicorn beetles. It is also possible to trap and kill the bait branches and leaves sprayed or soaked with liquid medicine in garden trees during the adult occurrence period of Anoplophora longicorn.