The females and larvae are clustered on the back of the leaves, sucking juice. The male has wings and can fly.
The sucked leaves are like spiders' webs, withering and withering, leaving only some meridians, which are very ugly. The scale has white sticky powder in vitro, which can contaminate the leaf surface and induce other diseases.
In the process of purchase, introduction, transportation and gift of Saxifraga, careful inspection should be carried out to prevent the introduction of insects and its spread.
Select the most suitable potted medium, and carry out scientific disinfection. For example, composting culture soil and other organic matters should be fully fermented and sterilized by high temperature or medicament to kill the eggs or reproduce the mother.
During the incubation period of nymphs, 40% speed kill 1000 to 1500 times of EC, or 25% EC of 700 to 800 times spray or root irrigation.
The nymph sucks the juice of leaves, fruits and twigs, and the damaged leaves appear green yellow and white spots. With the aggravation of the damage, the spots expand into pieces, and then the whole leaves turn pale and fall early; the flavor and quality of the damaged fruits decrease, and the young fruits often fall off seriously. Discharge of honeydew can induce coal pollution.
Early insect damage: spray 1500 times of 20% chlorpyrine wettable powder or 1000 times of 25% acaricide cream, 3000-4000 times of 2.5% Uranus cream, 2000-3000 times of 2.5% kongfu inulin cream, 2000 times of 20% fenvalerate cream and 1500 times of 10% imidacloprid wettable powder once every 10 days, and control 2-3 times continuously.
Insect pests in growth period: spray 1500-2000 times of 50% daofengsan emulsifiable concentrate, 80% dichlorvos emulsifiable concentrate or 40% dimethoate emulsifiable concentrate or 50% phosphamine emulsifiable concentrate, 50% malathion emulsifiable concentrate, 50%
