Bioassays on the role of tomato, potato and sweet pepper as sources of Tomato chlorosis virus transmitted by Bemisia tabaci MEAM1
Tomato chlorosis virus, transmitted by Bemisia tabaci MEAM1 in a semipersistent manner, is widely spread in solanaceous producing region in Brazil, as tomato (Solanum lycopersicum), potato (S. tuberosum) and sweet pepper (Capsicum annuum). The interactions between tomato, potato and sweet pepper in the virus acquisition and transmission processes by the vector were studied. ToCV-infected potato and tomato plants were used as sources of inoculum for the vector, which subsequently transmitted the virus to tomato, potato, and sweet pepper plants in choice tests of inoculated species. For no choice tests, having tomato as the source of inoculum, ToCV transmission rates for tomato, potato and sweet pepper were 53.3%, 50%, and 16.6%, respectively. When ToCV-infected potato was the source of inoculum, the transmission rates for tomato, potato and sweet pepper were 30%, 46.6 and 3.3%, respectively. In the trials with free-choice and ToCV-infected tomato as the source of inoculum, virus transmission rates for tomato, potato and sweet pepper were 50%, 35 and 0%, respectively. With ToCV-infected potato as source of inoculum, transmission rates were 25%, 10 and 0% for tomato, potato and sweet pepper, respectively. When viruliferous insects were used in trials with free-choice for the vector, transmission rates were 40%, 45 and 0% for tomato, potato and sweet pepper, respectively. Based on statistical analysis using the logistic regression model, tomato was the best source of inoculum, while sweet pepper was the least susceptible to infection and less preferred by whiteflies than the other Solanaceae species.
KeywordsCrinivirus Solanaceae Epidemiology Disease management
This study was supported by Fundação de Amparo à Pesquisa no Estado de São Paulo (FAPESP), Projects No. 2012/51771-4 and 2014/15114-4.
Compliance with ethical standards
Human and animal rights
This article does not contain any studies with human participants or animal performed by any of the authors.
Conflict of interest
The authors declare no conflict of interest.
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