How can you identify and fight the ToCV (tomato chlorosis virus)?

ToCV (tomato chlorosis virus) is a plant disease that occurs mainly in tomato crops, but also in other crops such as paprika and eggplant. This disease is spread in greenhouses by whitefly – both the greenhouse white fly and the tobacco whitefly. Unlike some other viruses, ToCV cannot be spread by crop working methods or human contact.
Tomato chlorosis virus
Jasper Verhoeven
Specialist Hygiene & Disinfection | December 9, 2019 | 2 min. reading time

ToCV identification

ToCV can be recognized by yellowing between the veins of old leaves. About four weeks after infection, the first symptoms appear; the old leaf curls around and feels brittle. Symptoms are often similar to a deficiency disease such as magnesium or nitrogen deficiency. Yellow discoloration in the leaf is characteristic, and is easy to distinguish from the green areas. In later stages of this disease, the leaves develop a chlorotic bronze color. However, often no discoloration is found on the fruits or flowers but they may be smaller in size.
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ToCV treatment

ToCV can be treated by removing and discarding the plants immediately once you recognize the symptoms. The removal of an infected plant is done by placing it in a plastic bag on the spot and then carefully removing it from the greenhouse and burning it in an incinerator. Furthermore, treatment and control of whitefly is of great importance in order to prevent further spread. The risk of distribution is greatest from the summer until the start of autumn when the whitefly is in its most active stage. They mostly spread in the adult stage of the greenhouse whitefly and tobacco whitefly. Within one hour, a whitefly can transmit the virus to another plant. Whitefly is not only present in greenhouses but this pest can also be present in sorting and packaging rooms. Therefore, hang sticky insect traps here to also monitor the problem. Whitefly can be biologically combatted by introducing biological predators such as Macrolophus Pygmaeus  and  Eretmocerus eremicus. Chemical products can also be used to fight whitefly. However, be mindful of the adverse effects of these products. Ask our specialists for appropriate advice.

In addition to removing plants and controlling whitefly, it is also important to take measures when starting and finishing crop cultivation. Horticultural alerts provide the necessary advice to manage the general hygiene protocol for the control of ToCV during crop changes.  

Reporting this infection

Do you suspect that your crop is infected with this virus? Please report this to the NVWA. Every European grower is legally obliged to report this disease to the NVWA. Every situation is individually assessed so that the appropriate ToCV protocol can be implemented. 
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Can't find your answer? Fill out the contact form and our specialist Jasper Verhoeven will get back to you. On weekdays, even within 24 hours.

How can you identify and fight the ToCV (tomato chlorosis virus)?

ToCV (tomato chlorosis virus) is a plant disease that occurs mainly in tomato crops, but also in other crops such as paprika and eggplant. This disease is spread in greenhouses by whitefly – both the greenhouse white fly and the tobacco whitefly. Unlike some other viruses, ToCV cannot be spread by crop working methods or human contact.
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Jasper Verhoeven
Jasper Verhoeven
Specialist Hygiene & Disinfection | December 9, 2019 | 2 min. reading time
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Tomato chlorosis virus

ToCV identification

ToCV can be recognized by yellowing between the veins of old leaves. About four weeks after infection, the first symptoms appear; the old leaf curls around and feels brittle. Symptoms are often similar to a deficiency disease such as magnesium or nitrogen deficiency. Yellow discoloration in the leaf is characteristic, and is easy to distinguish from the green areas. In later stages of this disease, the leaves develop a chlorotic bronze color. However, often no discoloration is found on the fruits or flowers but they may be smaller in size.
Want to read more?
This is a premium article. Do you want to read the entire article? Log in and get access to the article directly. 
Don't have an account? Create an account for free. As soon as we have processed your request you get access to the entire article.

ToCV treatment

ToCV can be treated by removing and discarding the plants immediately once you recognize the symptoms. The removal of an infected plant is done by placing it in a plastic bag on the spot and then carefully removing it from the greenhouse and burning it in an incinerator. Furthermore, treatment and control of whitefly is of great importance in order to prevent further spread. The risk of distribution is greatest from the summer until the start of autumn when the whitefly is in its most active stage. They mostly spread in the adult stage of the greenhouse whitefly and tobacco whitefly. Within one hour, a whitefly can transmit the virus to another plant. Whitefly is not only present in greenhouses but this pest can also be present in sorting and packaging rooms. Therefore, hang sticky insect traps here to also monitor the problem. Whitefly can be biologically combatted by introducing biological predators such as Macrolophus Pygmaeus  and  Eretmocerus eremicus. Chemical products can also be used to fight whitefly. However, be mindful of the adverse effects of these products. Ask our specialists for appropriate advice.

In addition to removing plants and controlling whitefly, it is also important to take measures when starting and finishing crop cultivation. Horticultural alerts provide the necessary advice to manage the general hygiene protocol for the control of ToCV during crop changes.  

Reporting this infection

Do you suspect that your crop is infected with this virus? Please report this to the NVWA. Every European grower is legally obliged to report this disease to the NVWA. Every situation is individually assessed so that the appropriate ToCV protocol can be implemented. 
Contact form
Can't find your answer? Fill out the contact form and our specialist Jasper Verhoeven will get back to you. On weekdays, even within 24 hours.
Jasper Verhoeven
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