Autumn maple leaves appear green, yellow? Under close observation, small leafhoppers "walk and jump" on it, these small cicadas gathered together can cause the whole tree or even the whole autumn maple tree to wither yellow, fall off, with the spread of insect pests, often a large area of ecological landscape is destroyed, so that garden conservators can not prevent it!
[1] These small "cicadas" on the autumn maple tree:
Autumn maple leafhoppers suck leaf sap with adults and nymphs, and the affected leaves show small white spots that lose their green color, and in severe cases, the whole leaf leaves are yellow, pale, and the branches die, and the leaves fall early, affecting the growth and development of trees, weakening the tree, and spreading the virus.
After the young leaves and shoots are harmed by leafhoppers, the leaves are deformed and appear yellow-brown spots, and then the leaf tips first dry out, and then the whole leaf is dried up and shed.
After the old leaves were killed, the whole tree was yellowed from a distance, and there was no obvious shedding phenomenon.
【2】Identification characteristics:
The leafhopper is 4.6–4.8 mm long and resembles a cicada. Yellow-green or yellowish-white, can walk, jump. The head is wider than the dorsal plate of the anterior thorax, with large and obliquely positioned compound and eyes, and the beak is very long and the end is swollen and flattened.
[3] These two stages of the leafhopper are particularly arrogant:
Summer temperature is higher, autumn maple leaf cicada insect infestation occurs more, every year from May to June, September to October for the two peak periods, serious harm often cause autumn maple tree weakness, a large number of leaves fallen.
【4】Autumn maple leafhopper control technology sharing:
1. Reduce the source of insects in autumn and winter: Loose bark and deciduous leaves under the tree are good wintering places for autumn maple leafhoppers, which can scrape off the loose bark layer in autumn, remove dead branches and leaves in winter and combine management measures such as tree whitening (such as Qilin Kebai) to effectively reduce the source of overwintering insects.
2. Chemical control when pests occur:
(1) During the occurrence of insect pests, traditional spray methods such as (Qilin Guangzheng or Zhiru) can be used for extermination;
(2) Because the autumn maple tree is tall and is mostly used in crowded places such as both sides of the road and the greening of the park, it can be applied according to this characteristic by root application (such as Qilin tree insect Qing), and the effective period can reach more than half a year.
Autumn maple leafhopper front-line prevention and control cases:
Case 1: Nanning, Guangxi, an industrial park in the autumn maple leaf cicada harm is serious, tree leaves show the overall yellowing, dry phenomenon, in this situation, Qilin technical teacher guidance to use tree insect root cleaning technology prevention and control, the return visit effect is as follows:
On-site hazards:
On May 21, the Qilin tree insect clearing site application:
First return visit on May 26:
Second return visit observation on June 17:
Third return visit on July 27 observation:
Case 2: In Zhongshan, Guangdong Province, the autumn maple trees on both sides of the road have yellowed and withered in a large area due to the harm of leafhoppers.
Comparison of effects after 70 days of medication: