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Infestation of cherry trees by aphids
One of the most common pests of cherry trees is the Black Cherry aphid. If the damage has occurred to the cherry trees, it is too late for the fight. Therefore, as a precaution, already examine the young leaves on the aphid nests during flowering.
explanation of Terms
Under the name "black cherry aphid" - also called "black cherry louse" or simply called "cherry aphid" - two species of this species are united: black sweet cherry aphid (Mycus pruniavium) and black sour cherry aphid (Mycus cerasi). The difference is of little importance to a gardener, as both species haunt both sweet and sour cherry trees and undergo much the same evolution.
Schad pictures
The cherry aphids prefer to infest young leaves on the shoot tips. The difference is the damage caused by the various aphids. While in the infestation of sweet cherry aphids, the leaves curl up heavily and the shoot tips thereby stunt and possibly die off, the infestation of sour cherry aphids inhibits growth on the new shoots, the leaves bulge only slightly.
The aphids but a sugary liquid from. The so-called honeydew, in conjunction with the resulting dew, soils and sticks the leaves and fruits. Between mid-May and early June, the aphids migrate to the wild herbs to later return to the eggs for laying on the cherry trees. Cherry aphid infestation is particularly troublesome to the young trees; The older trees survive this usually without major damage.
fight
In the control of aphids preventive measures should be in the foreground. This includes examining the new shoots and leaves already during and immediately after flowering. The cockchafer and other insects in the garden fight the aphid colonies in a natural way by eliminating the aphids. These beneficials must be conserved and promoted. When handling the sprays you should opt for gentle care products.
Tips & Tricks
If the spraying is unavoidable, it must be taken into account that this only makes sense before the leaves are rolled up.