[Damage] The larvae mainly feed on fruit pods and form ponkans, causing rot and causing early fruit shedding. In serious cases, the loss is great.
[Main features] The adult body is 6-8 mm in length, with a wingspan of about 16 mm and dark black. The compound eye is yellow. Three monoculars are arranged in a triangle. The front seam is bent into a bell shape. The eyebrows are awned and mans are slender. Chest yellow, long black and yellow short hair. Pronotum dark brown, with 2 yellow vertical stripes. The abdomen consists of 5 sections and is reddish yellow with T-shaped dark spots. Male adults are smaller than female adults and have a body length of 0.7-0.8 mm. The egg is kidney-shaped, tiny and yellowish. The larvae are yellowish-white to pale yellow in color, conical in shape, with a small, pointed tip, hooked black, and good bouncing, for a total of 3 years of age. The fence is light yellow to brown.
Occurrence regularity occurs in the south every year from 7 to 8 generations, and in the northerly region from 5 to 6 generations. Due to abundant food and warmer temperatures, the algebra of one year varies from place to place. It is mainly wintering. There is no obvious wintering period in the south, only when the temperature drops, there are fewer adults, and when the temperature rises, there are more adults. The first generation of adult worms generally occurred in the middle of April in the south and in mid-May in the north. Its peak period was in the middle of May in the south and early July in the north. Each generation is overlapping and difficult to distinguish. The field was prosperous from early May to mid-November, after which the temperature dropped and was reduced. Adults emerged before the morning and were most affluent before and after 8:00. After adult emergence, after a period of sexual maturity, it is possible to produce eggs after spawning. During spawning, the ovipositor pierces the skin, and the eggs are produced between the pericarp and the scoop flap. Each hole is spawned with 5 to 10 eggs and 200 eggs are laid each year. 400 eggs, about 1 day in summer, 2 days in spring and autumn, 3 to 6 days in winter, 7 to 9 days in larval summer, 10 to 12 days in spring and autumn, and 13 to 20 days in winter. After hatching, the larvae penetrate into the scoop of the fruit. Causes the fruit to rot and fall off. The larvae were molted twice and the old larvae were perforated and the fruit was removed into the soil. Take 2 to 3 centimeters in the soil.
[control methods]
1 Carry out quarantine, prohibit the invasion of the diseased land fruit to prevent spread.
2 Winter intensive cultivation of insects.
3 bags of insect protection.
4 Trapping the male Drosophila. Adults start trapping male flies with traps containing the information hormone (methyl eugenol) plus a small amount of trichlorfon or dichlorvos before they lay eggs on the fruit.
5 chemical control. The adult canopy can be killed by 80% of dichlorvos EC or 90% crystal trichlorfon 800 to 1000 times, or 20% ex Vivo EC such as pyrethroids 2000 to 3000 times.
Astragalus Membranaceus, also known as Mianqi. Herbs perennial, 50-100 cm tall. The main roots are thick, woody, often branched and gray-white. Stems erect, upper branched, finely angled, white pubescent. Herbs perennial, 50-100 cm tall. It is produced in Inner Mongolia, Shanxi, Gansu, Heilongjiang and other places.
The medicinal use of Astragalus membranaceus has a history of more than 2000 years. It has the functions of enhancing immune function, protecting liver, diuresis, anti-aging, anti-stress, antihypertensive and a wide range of antimicrobial activities. However, it is forbidden to use the evidence of excessive superficial pathogenic factors, stagnation of qi stagnation and dampness, stagnation of food accumulation, excessive heat and toxicity at the beginning of carbuncle or after ulcer, and excessive Yin deficiency and yang.
Astragalus Membranaceus
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