What are the main pests of sweet-scented osmanthus?

What are the main pests of sweet-scented osmanthus? How to control sweet-scented osmanthus pests? We also ask experienced netizens to help introduce the common pests of sweet-scented osmanthus, such as gibbons, shell insects, thorn moths and coir moths. The planting network has sorted out the harm and control methods of the above pests to sweet-scented osmanthus trees, which are listed below for netizens' reference. Sweet-scented osmanthus tree gibberellin: harm: the larva eats food in the cortex of the branch and exudes oil-dotted brown gelatin. when the damage is serious, the bark bursts, the main branch or the whole plant dies, the adult bites the tender leaves, and in serious cases, a large number of fallen leaves. 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. Sweet-scented osmanthus tree shell insects: harm: the shell 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. Sweet-scented osmanthus tree diamondback moth: harm: diamondback moth mainly includes yellow diamondback moth, green diamondback moth, green diamondback moth, flat diamondback 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, the adults were trapped and killed by black light, and the cocoons attached to the branches and trunks were removed manually. Chemical control should be carried out in time in the stage of young larvae, and the larvae can be sprayed with 2000 times of cypermethrin or 1000 times of trichlorfon. Sweet-scented osmanthus tree coir moth: harm: there are large coir moth, tea coir moth and other species. 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. Click to get more sweet-scented osmanthus tree planting techniques