Green peach aphid - identification, pest management

The green peach aphid, Myzodes persicae, is a species widespread in Europe, Asia, North America, Africa, and Australia. The green peach aphids attack a large number of species of woody plants and grasses, both in the field and in greenhouses and seedbeds.

Description. The aptery specimens have a wide oval body, slightly spherical, 1.4-2 mm long, and light green or dark green. The winged forms have a black head and thorax, a yellow-green abdomen, with lateral spots and transverse stripes, which join in the middle in a large, black spot.

Biology and ecology. The green peach aphid is a migratory species. It overwinters in the egg stage. Winter eggs laid on peaches hatch from the first or second decade of March. The fundatrix forms give birth viviparously to several generations of fundatrigenia forms within 3-4 weeks. The latest generation of winged females migrates to different species of grassy, cultivated, or spontaneous plants. They reproduce by parthenogenesis, viviparously giving birth to several generations of winged and aptery females.
In autumn, starting with the third decade of September, and until November, the sexed females appear, which after copulation lay the winter eggs.

Damage. It is a polyphagous species, attacking over 240 species of plants, especially preferring peach trees, apricot trees, tomatoes, eggplants, peppers, potatoes, tobacco, salads, peas, beans, spinach, etc. The aphids form colonies on the underside of the leaves, which sting to suck the intracellular fluid.
Due to the attack, the tissues necrotize, and the leaves twist. If the attack is strong, the leaves turn yellow and dry out. In addition to direct damage, it is also a vector for various viruses, which produce mosaic in some plants (potato, tomatoes).

Pest management. Winter treatments with horticultural oil destroy the eggs and diminish the population’s reserve.

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Read carefully and follow the instructions on the label of each product

To control this pest, the first treatment with insecticides has to be carried out in the spring, a few days after the appearance of the first colonies on the leaves and it has to be repeated with the appearance of every generation, if necessary.