How to get rid of aphids on cabbage
Tiny cabbage aphids are no less formidable pests than caterpillars. These sucking insects populate the leaves and shoots in early spring. In each colony, there are wingless and winged females that fly and infect other plants over large areas, because they have an almost incredible breeding rate.
And although the insect itself, a person with insufficiently sharp vision may not even notice at all, the plants affected by the pest are very easy to identify. The first sign of the appearance of aphids on plants is garden ants scurrying along the leaves, which, using aphids 8 as a “dairy cow,” transfer it from diseased plants to healthy ones.
Aphids inhabits mostly the underside of the leaves. This makes it difficult to protect plants. Adult insects and their larvae with proboscis puncture the skin of the leaves and suck the juice from the plants. At the same time, the growth of the head is suspended, the leaves are deformed, taking the form of a dome, becoming colorless, twisting and withering. With severe damage, sticky excretions appear on them.
Over the summer, aphids give many generations. Most severely affected by it are late and late cabbage varieties. Especially quickly aphids reproduce in warm weather, and heavy rainfall and cool weather restrain the growth of the number of aphids, and sometimes cause the death of its colonies.
See also: Fighting aphids - my way
Preventing the appearance of cabbage aphid
To carry out measures to protect plants from aphids is necessary constantly, using, first of all, various methods of prevention.
First, next to cabbage, you need to plant at least a few bushes of tomatoes (preferably low stamping varieties, so they do not obscure the bed). Their scent repels the aphids.
Very effective use against cabbage aphids predatory insects (ladybirds, lacewings, etc.). But at the same time, it is necessary to refrain from chemical measures to control aphids, and somewhere near to plant small bluffs of seed plants of umbellate cultures (dill, carrots, celery) that attract these insects.
The natural enemies of aphids are also the larvae of the flies of the syrphids and aphidius. The last insect, like a rider, climbs a female aphid, pierces its body with a pointed proboscis and lays its eggs in its internal cavity. Such a female swells in a spherical way, acquires a brown color and dies. The larvae of the rider fly through the hole that they gnaw on the dorsal or lateral wall of the aphid aphid.
Pupae of this variety of wasps (1000 pieces) in wood chips can be purchased online.
In addition to preventive measures, it is necessary to constantly carry out "punitive" measures. When the first colonies of cabbage aphids appear at intervals of 12-15 days, cabbage must be sprinkled with infusions or decoctions of potato or tomato tops, onion husks, tobacco, adding 40 g soap to 10 l of the working solution. Sprinkle affected plants better in the evening.
If there are a lot of aphids on cabbage, and conventional means can not cope with it, then it is necessary to spray the plants from the underside of the leaves with the preparations Iskra, Kinmiks, Biorin, Fury, Zeta not later than 4 weeks before the harvest.
Good results are obtained by pollinating plants with a 2,5% dust “Vofatoks” (another name is “Metaphos”). This is explained by the fact that the body of cabbage aphids has a rather plentiful wax coating. Due to this, the powder adheres well to it and is retained, and the liquid (drug solution) rolls down. In addition, when pollinating plants, the venom is coated more evenly than when sprayed, a certain amount of dust falls on the lower side of the leaves, where aphid colonies are also present.
After harvesting cabbage, you must carefully collect on the beds of cobs, torn leaves and weeds, immediately burn them or put them in compost piles. This will largely destroy the hibernating eggs of the pest.
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