Tomato Yellow Leaf Curl Virus


Tomato Yellow Leaf Curl Virus



In a Nutshell

    Thicker and wrinkled leaves, with interveinal chlorosis clearly visible on the leaf bladeThe chlorotic margins of leaves are rolled upwards and inwardsThe number of fruits is reduced, but no noticeable symptoms are visible on surface

Hosts: %1$s

· Tomato


When it infects plants at the seedling stage, TYLCV causes severe stunting of young leaves and shoots, resulting in a somewhat bushy growth of the plant. In older plants, the infection results in excessive branching, thicker and wrinkled leaves, and interveinal chlorosis clearly visible on the blade. At later stages of the disease, they take a leathery texture and their chlorotic margins are rolled upwards and inwards. If the infection takes place before the flowering stage, the number of fruits is considerably reduced, even though there are no noticeable symptoms on their surface.


TYLCV is not seed-borne and is not transmitted mechanically. It is spread by whiteflies of the Bemisia tabaci species. These whiteflies feed on the lower leaf surface of a number of plants and are attracted by young tender plants. The whole infection cycle can take place in about 24 hours and is favored by dry weather with high temperatures.

Biological Control

Sorry, we don't know any alternative treatment against TYLCV.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. Insecticides such as organophosphates, carbamates and pyrethroids and imidacloprid used as soil drenches or spray during the seedling stage can reduce the population of whiteflies. However, their extensive use might promote resistance development in whitefly populations.

Preventive Measures

    Use resistant or tolerant varietiesPractice crop rotation with plants not susceptible to the whiteflyUse nets to cover seedbedsPlant early to avoid peak populations of the whiteflyUse sticky yellow plastic trapsMulch the seedbed or the field to break the life cycle of the whiteflyIntercrop with rows of non-host trap plants such as squash and cucumberMonitor the field, handpick diseased plants and bury themAvoid to plant alternative host plants close to tomatoesFind and eradicate weeds in and around the fieldPlow deep all plant debris after harvest or burn them


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