Decipher the causes
Fighting the aphids directly only works for a short time. It is important to research the causes. Only when the triggering factors have been eliminated can you get rid of the pests in the long run. These framework conditions magically attract aphids:
- a poorly ventilated location in the greenhouse
- cold drafts under the tomato roof or in the polytunnel
- incorrectly measured fertilizer dosage
- consistently moist foliage
- a partially shaded location
- Fighting mealybugs on orchids - this is an end to the plague
- Place tomatoes correctly - this is how it works in beds and pots
- Fighting lice on maples - effective home remedies for aphids
It is primarily young tomato plants that target aphids. The parasites make no difference whether the cultivation is in the greenhouse, in the bed or on the balcony. The larger, more vital and robust the tomato plant, the more likely it will be spared from lice.
Fight aphids biologically
If you have discovered the tiny green, brown or black aphids, the following biological sprays will help:
- Milk-water mix in a ratio of 1: 1
- Vinegar-water from 1 liter of water and 1 tablespoon of vinegar
- Nettle broth made from 10 liters of water and 1 kilogram of nettle leaves
- Tobacco brew, consisting of loose tobacco, dissolved in water
These home remedies are applied repeatedly until the infestation pressure subsides or has completely disappeared. If there is a risk of brown rot infection at the same time, the foliage should not be moistened. Alternatives are available in this case.
Use primary rock meal to combat lice on tomatoes
Ground sedimentary rock from the Jura formation is widely used in organic agriculture. It turned out that lice on tomatoes can be combated excellently with the fine powder. Repeatedly applied with the aid of a powder syringe in the early morning hours, you will quickly have the plague under control. You can achieve a similar effect with algae lime and pure charcoal ash.
Tips & Tricks
In order to combat aphids in the greenhouse, you can get help from their natural predators. In specialist shops you can get lacewing larvae, two-point ladybirds and parasitic wasps (€ 14.59 at Amazon *) that lice like to eat on tomatoes.