2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
The caraway moth loves to feast on not only caraway seeds - it also actively damages dill with parsnips, and a little less often - carrots and some crops from the celery family. You can meet this shameless scoundrel in the south and in central Russia. Despite the fact that a single generation of these gluttonous parasites develops in one season, they do a lot of harm. Caterpillars are considered especially harmful, initially making holes in the pulp of the leaves, and a little later in the central veins. And after a while, voracious caterpillars bite into the stems and begin to feed on their tissues, which in turn contributes to the inevitable death of plants
Meet the pest
Butterflies of the caraway moth are characterized by the most varied colors: their front wings can be either brownish or pinkish, decorated with black and white specks, as well as dark strokes. And the wingspan of these pests is usually in the range from 21 to 30 mm.
The oval eggs laid by the caraway moth are usually slightly flattened, painted in greenish tones and reach a length of 0.5-0.6 mm. And the caterpillars of these pests can be either bluish-black or dark gray. Individuals of the latter age often reach a length of about 20 mm. As a rule, they are characterized by a dark gray color and are endowed with tiny black heads, and their body is endowed with shiny and black light-bordered scutes that bear hairs. On the sides of the bodies of voracious caterpillars are quite colorful orange-yellow stripes.
Butterflies overwinter most often indoors. Especially attractive to them are the rooms in which the testes are threshed or dried. Often these pests can be seen under awnings or in attics. With the onset of spring, females begin to lay eggs on various umbrella crops. In the south, they usually lay one or two or three eggs, placing them mainly on the leaves. And in May, the egg-laying process of pests becomes massive. The hatched larvae make numerous passages in the leaves of plants, and also bite into the stems and mine the central veins. Upon reaching an older age, they move to inflorescences and actively entangle them with plump cobwebs. In addition, older individuals eat seed ovaries and flowers with great pleasure.
With the onset of July, harmful caterpillars gnaw through capacious cavities in the stalks and pupate there after a while. And after eighteen days, the pupae turn into cute butterflies remaining for the winter. As a rule, from the moment of laying eggs until the appearance of the first butterflies, it takes about thirty-five to forty days.
How to fight
The testes of umbelliferous plants must be collected in a timely manner and threshed quickly, and the stems remaining after threshing should be immediately burned. For preventive purposes, it is important to take care of the destruction of wild-growing umbrella crops - especially for the hogweed, on which the caterpillars of the caraway moth develop most often.
Another equally important preventive measure is the observance of crop rotation - umbrella crops are returned to their former areas only after four years, not earlier. And between different-age plantings, it is necessary to observe spatial isolation.
Dill inflorescences inhabited by harmful caterpillars are recommended to be promptly cut and destroyed. If the number of shameless pests on the site is too large, then they start treating with "Bitoxibacillin" or "Lepidocide", spending 50 - 70 g of the drug for every ten liters of water.
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