Luan tree some people know, there are people do not know, it is a kind of green plant, in the central and eastern regions of our country is widely planted. Luan tree growth ability is strong, adaptability is also strong, easy to manage, but in the peak growing season it also often appears some diseases and insect pests, will lead to plant fluid, then, luan tree common diseases? How to control luan tree insect pests? Let's take a look!
First, what are the common diseases of Luan trees?
A common disease of luan trees is gum disease. Gum disease is one of the diseases that occurs in most plants, especially trees or fruit trees. At the beginning of the onset of Luan tree flow gum disease, the diseased part of the tree body is slightly swollen, dark brown, looks very wet, and slowly the diseased part is dented and cracked, and a pale yellow translucent soft rubber block overflows, which will become amber-shaped and hard. After the occurrence of gum disease, the growth of luan trees is slow and the tree is weak.
Prevention and control methods: Flow gum disease is divided into physiological flow glue and invasive flow glue, the former caused by frost damage, sun burn or mechanical damage, and the latter caused by fungal or bacterial infection. The prevention and control of flow gum disease can strengthen water and fertilizer management, enhance tree potential, improve resistance, and prevent frost damage in winter. After the occurrence of glue disease, the rubber block can be scraped off with a sterilized blade and applied to the wound with a stone sulfur compound.
Second, how to control luan tree insect pests?
1. Six-star black-spotted leopard beetle moth
The larvae of the six-star black-spotted leopard beetle moth will moth into the branches from the base of the petiole of the plant, the back of the main vein of the leaf, or directly into the branches, and the infected branches will wither and die. To control the six-star black-spotted leopard beetle moth, you can spray insecticide, imidacloprid and other agents, and remove the branches and dead branches with insects.
2. Aphids
Aphids occur in the spring, mainly harming the young shoots, shoots and young leaves of luan trees, the treetops and leaves of the affected plant are covered with insect bodies, the young leaves are wrinkled into clumps, the young shoots are not curved, and there is a large amount of secretions, and there is an unknown liquid dripping under the tree like rain, and then the road surface will leave a black, dirty and annoying. Aphid control is mainly artificial spraying of insecticides.
3. Double-toothed beetle
The larvae and adults of the insect can damage the branches of luan trees and eat the nascent xylem, causing the plant to dry up and die. The control of double-toothed beetles can be sprayed with agents such as quick-killing butter and chrysanthemum emulsion, manually cleaning up dead branches and damaged trees, and can also manually capture adult insects.
4. Jujube turtle wax beetle
The jujube turtle wax borer sucks on the sap of the leaves, causing the tree to weaken, and in severe cases, the whole tree is covered with insects. The control of jujube turtle wax borer can be sprayed with oxidized fruit, water amine thiophos or irrigated with furandan, artificial control, scraping the female adult insects that overwinter on the trees and pruning the infected branches. The ice that rocks down the trees in winter wipes out the female adults who overwinter.
The above is the introduction of what are the common diseases of luan trees and how to control luan tree insect pests, luan tree diseases and insect pests mainly occur in spring and summer, that is, in the peak season of luan trees, spring aphids are particularly serious, aphid spring is an outbreak period, basically all luan trees will suffer, to be prevented and controlled early.
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