Tea small green leafhopper
"Jacobiascaformosana" is a small cicada with a light green body that hides in green leaves and is difficult to spot. Tea leafhopper is one of the main pests in the tea planting process, which occurs in all tea-producing provinces and regions across the country. Once the tea plant is infected with tea small green leafhoppers, it will cause the tea buds to harden and curl up, which seriously endangers the yield and quality of tea leaves. So, how to identify and how to prevent tea small green leafhoppers?
First, the characteristics of the hazard
The small green leafhopper of tea sucks the leaf fluid of the young shoots of the tea tree with adult insects and nymphs, and the main veins of the affected leaves become red, and the leaf tips and leaf margins become reddish brown and scorched; the internodes of the affected new shoots are shortened, and the buds and leaves shrink. Buds grow slowly or stop, and new shoots are reduced or even unable to germinate. In severe cases, all new leaves are scorched and shed. Later, the bud head is withdrawn and reduced, which affects the yield and quality. The finished tea strips are loose and the crumbs are increased; after brewing, the soup is turbid, bitter and bitter, and the aroma is abnormal.
Second, the law of occurrence
Occurs 9 to 11 generations a year. When the early spring of the following year warms up, the tea plants germinate and begin to spawn and reproduce. Leafhoppers have two peaks throughout the year, the first peak from late May to mid-June, and the second peak from October to early November. Sunny and rainy, well-planted and overgrown tea plantations take advantage of this.
3. Comprehensive prevention and control
1. Timely batch picking of tea to reduce pest feeding
Timely removal of young shoots can remove a large number of egg masses and worsen their nutritional conditions and spawning sites. First, it is necessary to properly tenderly pick, especially in summer, which is conducive to improving the quality of tea making and reducing pests, and the second is to harvest autumn shoots and reduce overwintering insect pests.
2. Biological control
Tea gardens can also use insects such as spiders, praying mantises, ladybirds and other insects to inhibit insect pests. Increase the number of such beneficial insects in the tea garden, apply protection to such beneficial insects, and create a virtuous circle of tea garden ecological environment.
3. Physical prevention and control
It is mainly to carry out swatch booby-trapping, that is, the oil and contact insecticide are applied to yellow-green paper or amber cardboard, and hung above the tea bush to trap the pests.
4. Pharmaceutical prevention and control
The drug is recommended to use [thiamethox, iprovir + prazidazone] / [NSFOCUS].
【NSFOCUS acetamidine】
1. Bifenthrin belongs to the pyrethroid insecticide, and its mechanism of action is to destroy the axon ion channels of insects, thereby affecting their nerve function
2. Acetamidine is a nitromethylene heterocyclic compound, which acts on the nicotin acetylcholine receptor at the synaptic site of the insect nervous system, interferes with the stimulation conduction of the insect nervous system, causes the blockage of the nervous system pathway, and causes the accumulation of the neurotransmitter acetylcholine at the synaptic site, resulting in insect paralysis and eventual death
3, the tea small green leafhoppers, aphids, whitefly and other kinds can be killed
4. At present, the product content is the highest content in China, and it is very scarce in China.
【Thiamethox, isopropylvir + prazidone】
1. It has a good control effect on aphids
2. It has the dual effects of touch killing and gastric toxicity, stopping eating after 4-6 hours after contact; irreversible paralysis knockdown occurs within 6-12 hours; and peak death is reached in 24-36 hours.
3. Long effectiveness, good permeability on the surface of plants, good adhesion.
4. It is more resistant to rain washing, and after use, the agent effectively penetrates into the leaves of the plant to form a secondary insecticidal peak, and the insect eggs are killed at the same time.
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