What insect pests should be prevented when planting sweet-scented osmanthus trees?

What insect pests should be prevented when planting sweet-scented osmanthus trees? What are the ways to prevent and control these pests? We also ask experienced netizens to help introduce the common pests in sweet-scented osmanthus tree planting, such as gibberellin, shell insect, thorn moth and coir moth; the planting network collates the harm and control methods of the above pests, which are listed below for netizens' reference. The harm of Jiding to sweet-scented osmanthus trees: the larvae eat in the cortex of the branches and flow out oil-dotted brown colloid. When the damage is serious, the bark bursts, the main branch or the whole plant dies, the adults bite on the tender leaves, and a large number of leaves fall in serious cases. Where the management is poor, the weak trees suffer more seriously. Control methods: scrape off the bark during the peak hatching period of the larvae (usually May) and apply 20 times of 80% dichlorvos emulsion; during the adult occurrence period (about June), spray the crown with 1000 times of 90% trichlorfon for 2 to 3 times. The harm of shell insects to sweet-scented osmanthus trees: the scale insects that harm sweet-scented osmanthus include red wax, blowing cotton, bran and so on. Nymphs and adults pierce the branches and tissues with oral needles to absorb sap, causing the branches and leaves to wither and die. At the same time, secrete honeydew, induce soot disease, serious harm. Control methods: spray 20% chrysanthemum EC or 2.5% deltamethrin EC 2500 times in the nymph incubation period; spray 1500 times EC in the shell formation, because of strong permeability, the control effect is good. The harm of diamondback moth to sweet-scented osmanthus trees: the main harm to sweet-scented osmanthus trees are yellow diamondback moth, green diamondback moth, green diamondback moth, flat moth and so on. Most of the larvae overwintered in the cocoon, and the young larvae ate leaves in clusters, which was the heaviest from July to September, and the adults had strong phototaxis. Control methods: from May to June, black light can be used to trap and kill adults; cocoons attached to branches and trunks can be removed manually; chemical control should be carried out in time in the stage of young larvae. 2000 times of cypermethrin or 1000 times of trichlorfon can be selected to spray and kill larvae. The harm of coir moth to sweet-scented osmanthus trees: the species that are harmful to sweet-scented osmanthus trees are big coir moth, tea coir moth and so on. The larvae can spit silk into cocoons, which are covered with all kinds of broken branches and leaves, showing various forms of bags. Most of the larvae are concentrated on the top of the crown to feed on the leaves, and in severe cases, the leaves can be eaten, resulting in serious damage to plant growth and even death. Control methods: cut off insect branches and remove cysts in winter; chemical control should be carried out in time in the stage of young larvae. 1000 times liquid of 95% crystal trichlorfon or 1000 times solution of 50% fenitrothion can be used to spray and kill larvae. Planting methods of Osmanthus fragrans Seeds flowering time of Osmanthus fragrans