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// // // Whitefly greenhouse

Whitefly greenhouse (Trialeurodes vaporariorum)

Trialeurodes vaporariorum

Greenhouse whitefly is a tropical insect spread over the world in greenhouses and open ground.

 

Damage

Damages more than 200 types of plants, for example, cucumber, tomato, pepper, lettuce.

How to distinguish

Long yellowish body size 0,9-1,5 mm with two white wings forming in one. Firstly, damages top leaves moving down through the plant, after that moving to other plants. Nonmotile larvae suck much plant sap, producing sugar-like excretion. Soot dew can appear on excretion. Soot dew makes black mold that prevents photosynthesis. Damaged leaves become yellow and dry.

Оранжерейная белокрылка на томате картинка

Greenhouse whitefly on tomato

Life cycle

6 stages: egg, 4 larvae instars, imago. Female to male ratio is 1:1. Optimal conditions: humidity (60-75%), temperature 21-27°С. Cycle from egg to egg lasts 20-40 days. Development from egg to imago lasts 7-10 days. Females during life lay 85-130 eggs (30 days). The quantity of male increases under high temperature. Only males hatch from unfertilized eggs. First larva instar has horns and can move. Being attached to the leaf, the larva loses its color and turns into second nonmotile instar.

Имаго и личинки белокрылки изображение

Imago and larvae

Preventive measures and biological control measures

For preventive control use Encarsia Formosa, Eretmocerus eremicus and Macrolophus caliginosus.