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Aphids are a recurrent plague in many gardens, and many gardeners are not quite sure how to fight aphids.
Whereby the optimal procedure differs from plant to plant, as different as the classical reasons why a plant is attacked by aphids. Are there aphids of currants and raspberries? How should you fight this?
Aphids (lice) on raspberries and currants?Actually, raspberries and redcurrants are not very often attacked by aphids. The typical pests are more called mountain gnat or raspberry beetle, currant gum mosquito or redcurrants, also various fungal diseases put the leaves to.
Before you tackle supposed lice, so you should be sure that they are also aphids, against the various pests use other means. In addition, a pest infestation always shows that the plants suffer in any direction distress, because only weakened plants are attacked by aphids. Therefore, you should check all culture conditions during an aphid attack, from the site to fertilization.
Aphids on raspberriesBut of course, among the hungry aphids, there are also species that like raspberries: the small and the large raspberry aphid.
- The small raspberry aphid bears the botanical name Aphis idaei and is mature to less than 2 mm in length, from light green to yellow-green in color, often coated with white wax flakes. Their young lice hatch from their eggs as early as March and then quickly form dense colonies on the shoots and inflorescences. They reproduce cheerfully until the third generation has grown up in June or July, which then wields wings and can see to it that new areas of the plant are conquered. These winged aphids can only be seen individually. They often hide very well in bifurcations of leaf veins on the underside of a leaf. Between October and December a sexual form grows up, which lays eggs for wintering.
- The big raspberry aphids (Amphorophora idae) are slightly larger than the sister species, but they are only distinguishable by specialists. This distinction is not so important either, because the big raspberry aphids are basically developing the same way, and they are also causing similar damage.
- However, most damage causes the small raspberry aphid, which forms huge colonies on the leaf undersides. As a result, the affected leaves curl, at the shoot tips form proper leaf nests. The large raspberry aphids, on the other hand, live isolated, highest in small groups, they attack the undersides of the leaves, where the leaves will curl a little at the edge.
If it is really aphids, there are several ways to combat:
- If you only discover a few leaves with lice, you should simply pick them and then apply a stinging nettle to eliminate overlooked aphids and strengthen the plant.
- If that's not enough, some insecticides are allowed for the home and garden, which could be sprayed in the winter or in the spring, see below for the currants. If the infestation is so massive that it can not be controlled, you might also consider replacing the infested raspberry with a virus-resistant raspberry plant.
Aphids on currantsThe currants have "their own aphid", the blackcurrant aphid or blackcurrant bladder, which begins very early in the sprouting of the leaves their Saugtätigkeit. For the aphids have already wintered on the currant bushes, hatch at the beginning of spring and can immediately start their work with the sprouting of the berries. They show themselves through red bumps in the currant leaves, if you control here, you will find on the underside of leaves the cause, the little green currant blister. Later, the leaves and shoot tips curl. In strong infestation, the leaf and shoot development is disturbed. The blackcurrant bladder can act as a virus carrier and should therefore be fought.
Even with the currants you should therefore control the leaves from the shoot.The first measure of light infestation is again the picking of leaves and a protective and fortifying nettle gout. Only then can approved plant protection products be used. These are berry fruit with first potash soap, so soft soap, quite well known as a home remedy recommendation - but used here in the purest form without any fragrance or other additives.
The most authorized soft fruit compost contains 0.15 grams of thiacloprid per liter, is harmful to bees, humans, animals and aquatic environments and may only be sprayed as a single plant treatment in accordance with the prescribed protective measures. Before the fruits are consumed, a waiting period of 3 days is required. However, this remedy only uses when it wets the aphids directly. If the lice have already curled up comfortably in leaf nests, it seems more convenient to be nontoxic and effective to simply remove these leaves.
This is also the only approved remedy, if other miracle remedies are recommended, you should be careful: Under the new plant protection law are only very specific funds in a specific application for very specific plants. No one will say anything if you spend a little too much of an approved remedy (you're at most damaging your garden). However, spraying an agent that is only approved for commercial cultivation in your garden could be a source of annoyance and severe fines.