2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
The umbrella moth can be found almost everywhere. It damages a wide variety of umbrella plants: anise, cumin, fennel, parsnip, celery, parsley, dill and carrots. The testes of these crops are mainly affected by the pest. In order to harvest a good harvest, it is very important to timely identify the appearance of the umbrella moth on the site and take appropriate measures against it
Meet the pest
An umbrella moth is a butterfly with a wingspan of 14 - 18 mm. Her hind wings are grayish, and the front ones are dark brown, framed with reddish front edges. The pronotum and head of this pest are usually yellowish.
The eggs of the pests are oval in shape and reach a length of about 0.5 mm. At first they are pale green in color, and later they acquire a light orange hue. The length of caterpillars, dark yellow with a brownish-black tint, is 10 - 13 mm. The intervals between the segments of the caterpillars are rather light, and their entire body is covered with white shields, bearing one or two hairs each. Pupae of the parasite are dark brown in color, 6 mm in length, located in transparent spider cocoons.
Wintering of harmful butterflies takes place in the crevices of various buildings, cracks in the bark and all kinds of other shelters. Their years starts from the end of May, continuing throughout June. The testes of various umbrella crops are just at this time in the budding stage. Females lay eggs on pedicels, flowers and buds. The total fertility of pests reaches 100 - 120 eggs. At the end of June, a revival of caterpillars occurs in woodland, and in the steppe and forest-steppe, it is observed already in the middle of this month. For eighteen to twenty days, harmful caterpillars actively eat stalks, flowers, buds, and also braid the rays of umbrellas with a web. In principle, they can damage leaves with unripe seeds, but this happens much less frequently. Individuals that have completed their development pupate in the cocoons' cobwebs located in the plant umbrellas. And at the end of July and in August, butterflies already fly out, leaving soon for wintering. Only one generation of umbrella moth develops per year.
It should be mentioned that the testes of caraway and parsnip, a little less often of carrots, as well as the testes of hogweed and a number of other wild-growing umbrella plants can also be damaged by the caraway moth, which is quite close to the umbrella moth in terms of harmfulness and characteristics of its development.
How to fight
Pupae with caterpillars can infect numerous endoparasites (over 35 species). The most active of these will be tahini flies.
In order to avoid attacks of the umbrella moth, the testes should be removed in a timely manner and threshed as soon as possible - this will contribute to the elimination of pupae and caterpillars of this parasite. Umbrella weeds must be mowed and numerous plant residues destroyed.
Before flowering, as well as after it, you can spray the testes with "Phosphamide". Spraying with infusions of garlic or onion skins is also allowed. Quite good means are infusions of tomato tops, bitter capsicum, wormwood, as well as ash and soap infusion.
During the period of budding and the formation of umbrellas, if there are more than three to four caterpillars on each plant, as well as when more than ten percent of the vegetation is populated by enemies of umbrella crops, they begin to treat them with insecticides or biological products. Against the umbrella moth, it is allowed to use "Lepidocide", "Bitoxibacillin", "Entobacterin", "Dendrobacillin", as well as various means based on pyrethrins and pyrethroids. If the use of one remedy does not give the desired effect, try using another.
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