The morphological characteristics of the vineyard chafer
Oriental beetle adults are 6-8mm long, nearly ovoid, dark brown, dull, with short, dense black or gray-brown hairs. The beetle insects are 15 to 19 mm in length, 8 to 10 mm in width, and oval in shape. The back of the whole has a green copper and metallic luster. The adult body size of the apple hair beetle is about 10 mm. Except for the small scutellum and the eel wing, the body of the beetle is densely covered with yellow-white hairs. The elytra wings are brownish yellow and can be folded into a "V" shape from the eel wings. Bai Xinghua beetle adult body length 20 ~ 24mm, all dark copper color, pronotum back and wing sheath surface irregular white spots more than 10.
The law of occurrence of vineyard chafer
Scarabs occur one generation per year, and some two generations occur one generation. Adults or larvae spend winters in the soil and the grapes sprout from the soil during the budding period. The earliest occurrence in spring is Oriental beetle and apple hair beetle. During the grape growing period, the green-green beetle mainly eats leaves, and the white beetle mainly eats fruit. The adult beetle has a pseudo dead nature.
Comprehensive control technology of vineyard chafers
From the beginning of April, observe the presence of adult vines on the vine at noon every day, and pay attention to the amount of the adult vines. If there is a large amount of occurrence, a forecast may be issued for prevention and control.
Agricultural control:
From the time the grapes were harvested to the time they were buried, deep turning was performed to destroy the scarab wintering sites and reduce the number of overwintering insects.
Physical control:
1 shocked and killed. Using the adult's dead-dead habit, in the period of adult emergence, the tree worms are knocked on in the early morning or early evening. The insects are then covered with plastic cloths under the trees and then intensively killed.
2 black light trapping. Using the phototaxis of the adult beetles of Scarabaeoidea and Scarabaeoidea, black light was installed in the orchard during the adult stage, and the height was about 1m higher than the canopy. Under the lights, water basins were set up to lure the adults to sudden death.
3 sweet and sour trapping. Using the chemotaxis of the white beetle, in the occurrence period of the white beetle, the sweet and sour liquid (amount of chrysanthemum emulsifiable concentrate mixed with imidacloprid powder insecticide plus sugar 6 parts plus vinegar 3 parts plus wine 1 part water 10 parts) was placed on the attractant Inside the bowl, hang it around the canopy with a wire and hang it every 10 meters. Pay attention to the timely replenishment of sweet and sour liquid, and replace the sweet and sour liquid after it rains.
Chemical control:
1 The ground application of pesticides to control adult soil. Choose 25% phoxim microcapsules, or 50% phoxim EC, or 40% chlorpyrifos emulsifiable concentrate, 666.7m2 dose 300 ~ 400g, diluted to 300 times, evenly sprayed to the ground. Before spraying, weeds in the tree tray. After spraying, wait until the liquid on the ground dries and then scoops it over again. Mix the drug and soil to prevent the light from decomposition of the drug and prolong its effective period. An orchard with a high density of insects can be sprayed once more after 15 days of spraying.
2 spraying insect control. In adult stage, spray 2.5% Kung Fu EC 1800 times, or 50% phoxim emulsion 1500-2000 times, or 2.5% to obtain 2000 times EC. Or 20% fenvalerate 1500 ~ 2000 times, or 40% speed cull EC 1500 times to eliminate chafer adult.
3 Spray 1:2:160 Bordeaux mixture (1 kg of copper sulfate, 2 kg of quick lime, and 160 kg of water) to make the leaves gray, 2 times in succession, at intervals of 15 days, so that the insects avoid leaves and prevent damage to leaves.
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