Scholarship 24/07934-3 - Maracujá, Potyvirus - BV FAPESP
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The attractiveness of the aphid Myzus persicae to cowpea aphid-borne mosaic virus (CABMV)-infected and asymptomatic passion fruit plants

Grant number: 24/07934-3
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Start date until: July 01, 2024
End date until: December 31, 2024
Field of knowledge:Agronomical Sciences - Agronomy - Plant Health
Principal Investigator:Jorge Alberto Marques Rezende
Grantee:Larissa Carpim
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

The cowpea-aphid borne mosaic virus (CABMV) is the cause of the passion fruit woodiness disease. The disease reduces the useful life of the culture from 36 to approximately 18 months. CABMV is considered one of the limiting factors for the maintenance and expansion of the culture in Brazil. The virus belongs to the genus Potyvirus, whose genome comprises a single-stranded RNA molecule transmitted by aphids in a non-persistent way. Epidemiological studies on the temporal dispersion of passionfruit woodiness show that CABMV is rapidly disseminated even in orchards where infected plants are eradicated. This information demonstrates that the secondary spread of the virus is interrupted at no time, even with the elimination of infected (symptomatic) plants with CABMV. Based on this information, was hypothesize that passionfruit plants infected with CABMV may attract aphids (based on volatile emissions) even when asymptomatic. Thus, the aphids attracted can acquire the virus during probing and transmit it to neighboring uninfected plants during subsequent probes. This study aims to evaluate the attractiveness of Myzus persicae to passionfruit plants infected (asymptomatic) with CABMV versus non-infected plants, and the identification and characterization of volatile organic compounds from passionfruit plants infected (asymptomatic) with CABMV and non-infected plants.

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