Pests
 
Tobacco whitefly Pests main menu
 

Both the tobacco whitefly and the greenhouse whitefly belong to the family Aleyrodidae.

In countries with a mild climate, the tobacco whitefly (Bemisia tabaci) is a common pest and very difficult to eradicate. Economic damage is caused not only by feeding, but also by honeydew secretion. The tobacco whitefly is a vector of several feared plant viruses such as TYLC and CYDV.

  Biology
 

In tropical and subtropical regions the tobacco whitefly has become a severe pest. At the moment it causes huge economic damage in southern European greenhouse crops, such as tomatoes, cucumber, melon, etc. Recently the tobacco whitefly has become more prevalent in western Europe.

The female tobacco whitefly deposits her small, oval shaped and yellow eggs on the underside of leaves, scattered all over the crop. The L1-larva is mobile. In the subsequent L2 and L3 larval and pupal stage, it is sessile. Larval stages differ from those of the greenhouse whitefly. The light yellow and transparent tobacco whitefly larva is oblate with a bevelled edge. The pupa is covered with few hairs. The adult tobacco whitefly emerges through a T-shaped opening. An adult tobacco whitefly is much smaller than a greenhouse whitefly, and its wings lay closely to the body and do not overlap.
The development from egg to adult takes 22 days at 26°C, but can take up to 70 days at 16°C.

 

 

  Beneficials
 
Eretmocerus mundus Eretmocerus eremicus
Eretmocerus mundus is the most suitable parasitic wasp for control of the tobacco whitefly (B. tabaci)
Eretmocerus eremicus can develop in any larval stage of the whitefly, and therefore it is an excellent biological control agent for whitefly.
Macrolophus caliginosus Paecilomyces fumosoroseus
Since a few years tomato and eggplant growers get support from the predatory bug Macrolophus caliginosus to control whiteflies.
PreFeRal WG is a new biological insecticide that provides excellent control of the greenhouse whitefly in protected cultures of tomato and cucumber.
   
 

 

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