The grape-seeking moth has become an important pest that harms grapes, and its concealment is strong and the damage is serious. Timely pesticide control is the key.
The occurrence rule occurs once a year, and the larvae overwinter in the grape branches. When the spring grapes sprout, the wintering larvae begin to move, and the foraging hazards continue in the branches. At the end of March, the phlegm begins in early April. At the end of April, at the beginning of May, the adult is concealed, nighttime, and phototaxis. Eggs are produced in the buds of the new shoots. The hatched larvae are plunged into the tender stems from the base of the new shoot petiole, which damages the pith, and the worms are discharged and accumulated near the pupil. The branches above the victim site often die dry. The young larvae from June to July mainly harm the tender vines of the same year; the older larvae of August-September mainly harm the old vines of more than two years old. The larvae in this period have large food consumption and the most serious damage; the mature larvae gradually enter hibernation in October.
Hazard characteristics, according to the pesticide network , the grape-winged moth is harmed by larvae into the grape vines, specializing in the soft tissue of the pith, so that the water and nutrients are difficult to transport upwards or interrupt, causing the leaves to turn yellow, causing the flowers to fall, and severe cases can be The above-mentioned parts of the victim are stopped growing or dry and die, and the victim is often swollen like a tumor.
Prevention and control technology larvae are more difficult to control after intrusion into the vines, so it should be better to control the ants before and after egg laying and before hatching. Timely spray 25% chloridazole III suspension agent 2000 times solution or 20% diflubenzuron suspension agent 3000 times solution 1-2 times; the drug should be sprayed and sprayed through the whole plant until the drug droplets flow without flow, to eliminate Adults and eggs control the amount of insects invaded. For the seriously damaged plants, the sap flow period (after the injury stops), each main vine from the ground 10-15 cm drilled with 2-4 coarse vertebrae, deep into the medulla, the orientation of the hole should be 40-50 degrees downward, the liquid is flowed down to prevent siltation. Then, omethoate (octanethiophosate, chlorpyrifos and other emulsifiable oils) can be formulated into a 10-20 times aqueous solution, and the medical solution is taken up by a medical syringe, and injected into the well, and the liquid for each strain is 4-5 ml. Immediately after liquid injection, the effect of sealing with a tape is better, and it can also be sealed with mud. According to the China Pesticide Network , when the pests have formed a hazard in the branches, the injection method can also be used to directly inject the liquid from the feces discharge hole, but the concentration of the drug should be about 100 times. After the injection, the dressing can be used as a blocking effect. For vineyards that are more damaging to larvae, you can use a pair of tweezers to put cotton balls, dip the dichlorvos 5-10 times solution, apply the hazard directly, and then wrap it with plastic film, which also has insecticidal effect. Do not use the medicine before harvesting.
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