Pests of onions

Pests of onionsHuge damage to the onion plantations is caused by pests such as the murmur, onion fly, onion moth, root onion mite, onion secretivel and stem nematode.

Consider the main pests of onions that can not only damage the crop, but almost completely destroy it.

Onion bun

This pest of onions is a brilliant greenish bronze fly up to one centimeter long. Pupae of the pest can winter in the soil at a depth of up to 15 centimeters, and the larvae hibernate in the tissues of the uterine bulbs. A flapper flies in the last decade of May, its activity is visible throughout the day, regardless of the weather conditions. The tinsel can lay eggs on the surface of the soil near the plants in the outer scales of the bulb or in the bulb itself. After about 7-10 days, white larvae appear from the eggs, which feed on the plant tissues for 15-20 days. During the development of the larva several times molt, they increase in size and form a light yellow cocoon. In early July, from the cocoons appear bubbles of the second generation, which damage late varieties of onions.

Lukovaâ flies

This pest is considered the most dangerous for all varieties of onions, but most of all onion fly likes onions. Flies have ash gray, on the belly clearly visible longitudinal brownish line. This wrecker hibernates as a pupa, closed in a red-brown shiny cocoon, its length is about 6-7 millimeters. Flies of flies begin in the first decade of May and lasts just over a month.

Flies eat floral nectar, but lay eggs in the soil near the bulbs or in the bulbs themselves. Larvae are born about a week after oviposition, they immediately begin life in the bulb, damaging the bases of the beams of green mass. After the bulb is destroyed, the larvae of the onion fly pass to the neighboring plant. Damaged plants can be identified by yellowed leaves and rotten bulbs.

Onion secretly

This pest of onions is a beetle whose body length reaches 3 millimeters, it has a black, oval-shaped, white-scaled body, the head turns into a proboscis curved to the bottom. This pest prefers onions, shallots and onions. Onion weevil wakes up at the end of April, first it feeds the remaining onion in the field, then goes on to early crops. Beetles gnaw through small leaves in the leaves, but sometimes the holes reach large sizes and the leaf mass dries up.

Females lay eggs in the holes of the feathers of onions. Larvae, depending on the temperature and humidity conditions are born through 7-16 days, they feed on leaf tissues up to three weeks of age, and then leave in the soil to a depth of up to 6 centimeters where pupate. The second generation of onion secretivists appears in the last decade of June.



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