Recently, vegetable growers reported that the eggplant was planted with cracked fruit, the grain was everted, and it was flowering and steamed. The fruit was bitter and bitter. The cracking of this symptom was caused by the damage of eggplant by the tea plant. In addition to eggplant, green peppers, tomatoes, potatoes, cucumbers, zucchini and other vegetables are also vulnerable to the damage caused by the tea plant. Because the individuals are small and difficult to be found, the hazards caused by them are often mistaken for the diseases that have occurred, resulting in prevention and control mistakes. The vegetable farmers must be screened for prevention and control.
First, the harm symptoms
The disease is very similar to the symptoms of viral and physiologic diseases. Adults and puppies are concentrated in the tender part of vegetables. Tawny pods tend to be tender, and pupa and larvae are concentrated on the young leaves, top or tender stems, twigs and young fruits of the plants. When the harmful parts grow old, the tea pods are immediately transferred to other young animals. At the tender end. After the eggplant is damaged by the tea plant, it will cause cracking of the eggplant, turning out of the grain, showing flowering bread-like shape and fruit bitter. After the green pepper was damaged by the tea plant, the parietal lobe leaflets became thicker and stiffer, with severe defoliation, falling, and falling fruit. After the potato was damaged by the tea planter, the leaves were black and the leaves were oily; the tomato was damaged by the tea plant. After the parietal lobe, shrinking, leaves stiff, and finally bald.
Second, the characteristics of occurrence
1. Small size. Astragalus membranaceus is a small pest commonly found on vegetables. Its body length is only 0.2 mm. Its body color is different from that of a common spider. There is no clear red color but a transparent color, which is difficult to observe with the naked eye.
2. There is tenderness. Adult nymphs and cubs are concentrated on the young leaves or the top of the plant, or on tender stems, shoots and young fruit. When the affected part grows old, it immediately shifts to another young place.
3. Suitable for high humidity conditions. The behavior of the tea aphid and the common red spider is different from that of a common hot spider. The eggs and cubs of the tea aphid require a relative humidity of more than 80%, and the tea aphids occur under humid conditions, and in the greenhouse, if the aeration is poor and the humidity is also high, Will cause tea 螨.
Third, control methods
1. Strengthen management. Deeply plowing the farmland, eliminating insect sources, and reducing the number of overwintering locust population bases; eradicating the weeds in the field, removing stubborn leaves and reducing leaves, reducing the source of insects; and harvesting the pods after the harvest of the former pods to remove the fruit, leaves and debris from the field. And focus on burning. Diligently check and find the affected plants to control them early.
2. Chemical control. The medicine is the key to the back of the leaves: the tea-cervical pods are mainly concentrated on the back of the young leaves, so when spraying the acaricide, they should be sprayed and turned down, focusing on spraying the young parts and turning the sprayer upward to spray the leaves. Control use 15% fluorenone 3000 times solution or 1.8% worm worm 2000 times spray, spray every 7-10 days, spray 2-3 times.
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