The grape felt niche is the main niche that damages the grape leaves. The surface of the damaged leaf forms 2-6 mm irregular protrusions, and the back is rotted and velvety hair. The initial hair is transparent, gradually white, and finally brown, affecting photosynthesis, thus inhibiting the plant's Growth and development.
The adult body is approximately white, conical, with two pairs of feet, body length 0.1-02 mm, oval, transparent near white.
Adults overwinter in the fur of Portugal's scales, generally the most parasitic on the young leaves at the tip of the grapevine. The old leaves have very few parasites, and the eggs are produced in the hair of the victim's hair. The damaged leaves affect the growth and even die. The most severe victims were from June to August in the whole year.
Control methods:
In early spring, when the grape sprouts, it sprays 5 degrees lime sulfur, which almost kills overwintering larvae. For severely-victim species, Bomer 0.3% lime sulfur may be sprayed after germination. In the growing season, when the grapes occur, the damaged leaves can be removed and burned to control the spread.
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