I. Overview
The white star-flowered golden turtle is a common Coleoptera insect whose larvae are scavengers and can feed on rotting straw, weeds and livestock and poultry manure in nature. The insect is mainly based on adult pests, and the diet is extremely extensive, covering 29 species of plants in 14 families and 26 genera, including grains, fruits, vegetables and other cash crops. The White Star Flower Golden Turtle is distributed in China and neighboring countries such as Mongolia, Japan, North Korea and Russia.
2. Morphology and characteristics
The adult body is 17 to 24 mm long and about 9 to 13 mm wide, oval in shape, flat on the back, brighter in body, more bronze or bronze, and many irregular white velvet spots scattered on the surface of the body. Some have green feet, and many irregular white spots are scattered on the back of the body and ventral surface. The head is narrow, the sides are visibly sunken in front of the compound eye, the central bulge, the base of the lip is short and wide, densely covered with thick notched dots, the leading edge is folded upwards, the middle sides have a border, and the outer side is inclined downwards.
3. Life history and habits
The larvae are scavengers, mostly live in loose soil or decomposing manure piles rich in humus, do not harm plants, and have a certain effect on the transformation of soil organic matter into small molecule organic matter that is easily absorbed and utilized by crops. On the surface, the larvae move face up on the belly and pray with their backs against the ground, moving quickly.
Adult insects lie out day and night, have strong flight ability, have pseudo-death, decay and sugar tendency, like to eat rotten fruits and crops such as corn and sunflowers, and also have a strong tendency to pheromones. Most of the spawning is in places with more humus, such as manure piles, straw, and humus piles, relatively humid environmental conditions, or the application of uncorrosed fertilizers.
The worm occurs in one generation per year, overwintering in the soil, the grub is its larval form, the adult worm burrows into the soil at night to roost, flies out during the day to feed on crops, and often accompanied by a buzzing sound.
4. Hazards
Adult insects eat corn grains, especially in the stage of corn milk ripening, grouting and other stages of harm is more serious, while spreading plant diseases such as rot disease, etc., in the corn ear bracts are often found to exist, 1 corn fruit panicle often drilled into 7-8 adult worms, the corn grain to eat out, the crop growth and yield will cause certain losses.
Fifth, prevention and control technology
1. Use the rotten and spoiled fruits at home into plastic bags and put them into the field, and their odor has a tendency towards adult insects, attracting adult insects into plastic bags for feeding, which can be centrally destroyed.
2. Use sweet and sour solution for booby-trap, mix with sugar: vinegar: wine: water = 3:1:1:10, put into a basin and put it into the field to trap the adult insects.
3. In the early stage of maize filling, use 50% octyl thiophosphorus emulsion 100 times liquid and drip on the top of the corn ear to control adult insect pests, and also treat the corn borer larvae to eat the corn fruit panicle.
Medicated spray, this method is not recommended. Because the adult insects are Coleoptera pests, their carapace is relatively hard, their flight ability is extremely strong, and the effect is not obvious.