Risk levels of Bemisia tabaci and TYLCV in areas of suitability for open field tomato cultivation under current and future climates

• Ano de defesa: 2018
• Autor(a) principal: Ramos, Rodrigo Soares
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade Federal de Viçosa
• Palavras-chave em Português: Bemisia tabaci; Mosca-branca; Tomate - Doenças e pragas; Viroses de plantas; Begomovírus; Solanum lycopersicum; Mudanças climáticas; Entomologia agrícola
• Link de acesso: https://locus.ufv.br//handle/123456789/32247

The aim of this work was to model the risk of Bemisa tabaci and the virose Tomato Yellow Virus Curl Virus in tomato crops Solanum lycopersicum using the MaxEnt and identify the climatic factors that are associated with the distribution; in addition to determining the spatiotemporal dynamics of B. tabaci using CLIMEX (version 4). In order to do so, this work was divided into three chapters; in the first chapter, the risk of B. tabaci in open field tomato crops for the present and future (2050 and 2070) was modeled, and the climatic factors that are associated to the distribution of the pest was identified. In the second chapter we studied the risk of dispersal of the Geminivirus (Tomato Yellow Leaf Curl Virus) in tomato crops under four scenarios of climate change (RCPs 2.6, 4.5, 6.0 and 8.5). In the third chapter we determined the seasonal variation of B. tabaci in tomato crops as well as the influence of climate for the species. The models demonstrate reliability. The results indicate that climatic changes will impact the distribution of insect pest B. tabaci, host plant S. lycopersicum and virose Tomato Yellow Leaf Curl Virus. Several regions around the globe are projected to be favorable for TYLCV in areas of suitability for B. tabaci under optimum conditions of open field tomato cultivation. The dynamic spatial-temporal climatic models are in agreement with the seasonal variations of B. tabaci, and the seasonal variations influence the density of B. tabaci in commercial tomato crops, presenting higher intensities of nymphs and adults in the months of October to December. Thus, the results of this work contribute to the elaboration of strategies to avoid the introduction and establishment of B. tabaci and virose (TYLCV) in suitable places for tomato cultivation, as well as the implementation of management programs in areas of current occurrence of species, especially in locations under high-risk conditions, and in times of increased susceptibility to the pest.