Pyrospharus similis, also known as Pygmaliona moth, Oriental fruithopper moth, Pear-eared fruit moth, Peach-footed Pest, Pest-eaten Pest, Peach-eyed Pest, referred to as “Pear some?â€, Insecta, Lepidoptera, Tortricidae The victim suffered a black spot on the fruit surface, and the black hole was blackened and rotted around the posterior fistula. The fistula had only 1 small hole, but no insect feces, and there was a large amount of insect feces in the fruit.
The morphological characteristics of adult body length 6 ~ 7mm, wings 11 ~ 14mm, the whole dark brown or grayish brown. The tentacles are filiform and the lower lip is grayish brown. The forewings are grayish black and their front edge has 7 groups of white hook lines; there are many white scales on the wing surface, there is 1 white spot near the outer edge of the center 1/3, there are some stripes at the back edge, and there are 10 blacks near the outer edge. The small spot is a distinctive feature of it, and it can be distinguished by the small carnivora. Dark brown hind wings, base color talk, two wings together, the outer edge of the synthetic obtuse angle. The feet are grayish brown, and each foot is gray at the end of the festival. Belly grayish brown.
Oval oval-shaped, central uplift, diameter 0.5 ~ 0.8mm, translucent. Just egg-laying milky white, yellowish white gradually reddish, larvae brown head shell seen near hatching. The larval last instar larvae are 10 to 14 mm in length, pink to pink, yellowish orange on the abdomen, brown head, yellow and white pronotum, transparent, pink on the back of the body. There are 30 to 40 ventral toe hooks, which are significantly different from the 10 to 20 toe hooks of the peach pod larvae. Hips 4 to 7 thorns. The head of the larvae and the pronotum are black, and there are 3 bristles on the anterior chest valve with a white body.
? 蛹 morphological characteristics: Length 6 ~ 7mm, brown. The back of the abdomen with 3 to 7 knots each had 2 rows of short stabs, 8 to 10 knots each had a row of slightly larger thorns, and the abdomen did not have 8 hooked hip thorns. Cocoon silk white, long oval, about 10mm.
Life history and habits Liaoning and Hebei provinces have 3 to 4 generations in one year, 4 to 5 generations in Henan, Anhui, Jiangsu, Shaanxi and Shandong, 5 to 6 in Sichuan, and 6 and 7 in Jiangxi and Guangxi respectively. The mature larvae were overwintering at the cracks of the branches of branches of fruit trees and necks and in the ground. The fourth generation in North China was mostly incomplete, and the larvae of the third and fourth generations were overwintering. The phlegm began in the middle of April in the spring of the following year, and it lasted for 15 to 20 days. Overwintering sites are more scattered, trunk, branching branches, roots and necks of coarse cracking, tilting skin, under the tree leaves, grass roots and soil distribution. Occurrence of adults in various regions: Liaoning region, wintering is from late April to late June; first generation from mid-June to early August; second generation from mid-July to late August; third generation from mid-August to 9 Early month. In the period of each generation of the Jiangsu region, the wintering season was in mid-April; the first generation in late May; the second generation in late June to early July; the third generation in late July; In Shaanxi, the wintering period is from early April to early May; the first generation is from late May to mid-June; the second is from late June to early July; the third is from late July to early August and the fourth generation is 8 From late September to mid-September. The peak period of each generation in the Sichuan region, wintering in late March; first generation in mid-May; second generation in mid- and late June; third generation in late July to early August; fourth generation in late August to early September; The five generations are not obvious. There is overlap between generations.
Prevention and control methods 1 Reasonably configure tree species: Avoid planting with peaches, pears, plums, and apricots when building gardens; clear overwhelming insect sources: Before winter and spring, the fruit trees will be scraped to remove rough skin and cracked skin, and the net leaves will be burned. At the same time digging the tree disk over pressure soil, eliminate the overwhelming insect source; 2 spring and summer timely removal of the peach tree tips tipped wilting but not turning dry treetops; 3 trapping adult worms: the use of pear small carivorous sex hormones and fruit vinegar Induction of adult worms; extermination of insect pests and fruit: timely removal of new wilt infestations, fruit insects, reduce the amount of insects transferred to the pears in later stages, generally l times a week; 3 release of Trichogramma: in 2 and 3 generations of adult production During the egg period, each bee was placed 4 times, and the 4th generation was followed by 2 bees, each time, 21,000 bees were released per acre; 4 Chemical control: 50% killing of chlorphosporic acid, 50% of dichlorvos, and 50% of dichlorvos. 40% Dimethoate EC, 90% trichlorfon crystals, all 1000-1500 times, 20% Fenvalerate (Epimethrin or Fast Extinguish EC), 20% Fenpropathrin ) Emulsifiable concentrates, 2.5% deltamethrin emulsifiable concentrate, etc. each 3000 times; 5 promote fruit sets of plastic film bags, control effect is obvious.
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