Black cherry aphid (Myzus cerasi) – pest management
The black cherry aphid, Myzus cerasi, is a species widespread worldwide. It can be found from the steppe area to the sub-mountainous area, causing significant damage in cherry or sour cherry orchards.
Description. The aptery forms and the winged forms have a spherical, blackish-brown, shiny body.
Biology and ecology. It overwinters in the egg stage on the cherry bark. Starting with April, the fundatrix forms appear, moving on the branches and the underside of the leaves. They sting and suck the intracellular fluid from the tissues. In autumn, the winged sexuparous forms appear, which return to the primary host. They give birth to males and females, and after mating, the females lay the eggs that overwinter.
Damage. The black cherry aphid is a common species in cherry and sour cherry orchards, causing great damage to seedbeds. They colonize the leaves and tips of the cherry shoots in early spring. In the case of large infestations, the leaves or even the flowers and fruits can become completely covered by black aphid colonies. After the attack, the leaves become twisted, turn brown and dry, taking the form of bouquets. The shoots become curved. In the case of strong infestations, the trees stagnate, and the fruiting strength of the trees decreases.
Pest management. It is recommended to carry out the treatments during the dormancy period, with horticultural oil.
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During the growing season, at the appearance of the first aphid colonies, treatments with specific insecticides have to be carried out.
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