07
Nov
2008
Psili Rosa is the insect responsible for tunnels in carrots, parsnip, celery and parsley
Biological Control
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Rosae is a body Psili 4-5 mm long, black shiny, round head, yellow-rusty. The wings are brilliant green. Legs yellow. The abdomen is oval, smaller and much shorter than the wings. Female 90-120 eggs deposited at a distance of 0.5 cm from the carrots. Eggs are white to milk. Embryonic development lasts for 4-17 days. The second generation appears in July-August, but they develop in 40-50 days.

Larvae do damage roots of carrots, parsnip, parsley and celery.

Measures to control these damages are crop rotation, avoiding cultivation of carrots on the same spot two years consecutive seeding between optimal sampling diseased plants and digging deeper as the fall after harvest.

Carrots sown in May will miss the first generation larvae attack and carrots harvested before mid-July escape the attack of the second generation of larvae.

Extra de seeds can be protected with a thin cloth put in a height of 3 cm, on a wooden or metal framework, which will not allow passage of insects.

May apply to yellow sticky traps at distances of 100 meters, the cultures of several hectares. Traps must not be kept silent for a week in May.

Carrot varieties less prone attack Psili Rosa: "Resistafly", "Sytan" and "Fly Away".

Source www.agroatlas.spb.ru, www.gardenersworld.com, www3.telus.net

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