Sprout Fly (Delia Platura)

Pest Type: Pumpkin Gourd

Row: Diptera – Diptera

Family: Flower Flies – Anthomyidae

It is found everywhere. It damages the stairs of pumpkin, legumes, beets, sunflowers, corn, cabbage, onions, and many other crops.

Fly size 3-6 mm, yellow-gray; mesoscutum with brown bloom and three dark brown stripes; abdomen gray with a narrow longitudinal black stripe; The chair is gray with a light orange velvet frontal stripe. An egg up to 1 mm in size, white, long, one end twisted, the other narrowed. Larva 6-7 mm long, pale white, fleshy; the front end is narrowed, two black curved mouth hooks are visible. Cocoon size 4 – 5 mm, brown-yellow, elongated-oval, with four large cloves at the posterior end.

Pupae overwinter in false cocoons in the soil, at a depth of 7-10 cm. Flies fly out in the second half of April. Additionally, eat. Eggs are laid under moist lumps of soil. In dry soil, laid eggs dry out and die.

Embryonic development lasts 3-9 days. In search of seeds, regenerated larvae actively move in the soil, feeding on plant debris. Having found seeds that germinate, the larvae penetrate the place where the sprout emerges and eats the grooves and pits in the cotyledons. Damaged seeds rot and die. In pumpkin stairs, the larva drills under the cotyledonary knee and penetrates the stem, causing the death of the plant. Three generations develop in a year. Years of flies of the first generation occurs at the end of April-May, the second – in June, the third – at the end of July. Larvae develop over 30-40 days. Populate in a fake cocoon in the soil. Particularly significant damage is caused by larvae of the first generation. The larvae of the two subsequent generations damage the roots of already stronger plants.

The pest is infected by riders from the Eukilid, Braconid, and other families. Nematodes of the Cephalobidae and Rhabditidae families parasitize flies in puparium. Pupae are affected by fungi of the genus Fusarium, microsporidia Toxoglugea, and adults by the fungus Entomophtora muscle.

Protective measures. Autumn plowing. Two, three times tillage during the season. Sowing optimally early. In the case of dangerous numbers (5-8 flies per 10 strokes of the net) – pre-sowing of granulated insecticides into the soil.

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