Pest Type: Fruit Pest
Row: Equine – Homoptera
Family: aphids – Aphididae
It is found everywhere. It damages plum, cherry plum, apricot, peach.
Female 2.5 mm in size, oval, light, three dark green stripes along the back; head, 5 segments, antennae and finger-shaped tail pale; tubules weakly protrude, brownish. A wingless parthenogenetic female 2.8 mm in size, oblong, light with three dark stripes on the dorsal side, with white powdering, antennae with 6 segments, tubules twice as short as the tail. The winged parthenogenetic female is 2.2 mm, the head and chest are brown with gray powder, the abdomen is light, the antennae and tubes are black.
Amphigone female 1.7 mm long, wingless, oval, light with a slight white powdering. Male – 2.2 mm, winged, head and chest dark brown, pronotum bordered by green transverse stripes; abdomen yellow with green spots. Egg – 0.4 mm, first light, after 3-4 days – black.
Fertilized eggs hibernate near the kidneys or on their surface. Larvae regenerate at an average daily temperature of 8 ° C, with a difference in the scales of the fruit buds. Toward the end of flowering, parthenogenetic females emerge, which revive 40-60 larvae. During the spring-summer season, it develops in 8-10 generations. Starting in mid-May, some individuals are encouraged and flies to the reeds, where it gives rise to the development of several generations. In this case, throughout the season, aphids undergo parallel development both on fruit trees and on reeds. In September-October, winged and wingless statenoscopes form in the colonies of the settlers. Winged statenoscopes fly over to stone fruit trees and within a month they regenerate up to 10 larvae, which become amphibole females.
Wingless statenoscopes revive larvae on reeds, which become winged males. Males fly to females, which after mating, lay 5-7 eggs. The female covers the surface of the eggs with slices of waxy substances, scraping it from the abdomen.
Aphids form colonies, populating leaves from the underside. Damaged leaves do not curl, its edges are bent and discolored along the veins. The fruits are also populated are poured. Often leaves and fruits contaminated by aphid secretions with masonry skins adhering to them are covered with a black coating of sooty mushrooms. The damage leads to stunting of shoot growth, a decrease in winter hardiness, as well as the quantity and quality of the fruit crop.
Measures to protect fruit trees from aphids. Cutting of root shoots and fatty shoots, especially intensively populated by aphids. With a population of more than 10-20 eggs per 10 cm of shoots, it is necessary in the pest breeding centers in early spring, before buds open, at a temperature not lower than +4 ° С, spraying – washing of ovicidal trees. If the aphid population density exceeds 5 colonies per 100 sheets, insecticide treatment is required. The regulated ratio of aphids and aphidophagous has one aphidophagous per 30 pest larvae. With this ratio, the use of affidavits is impractical.