Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23970
Tipo: Artigo
Título: Seasonal variation in natural mortality factors of Tuta absoluta (Lepidoptera: Gelechiidae) in open-­ ield tomato cultivation
Autor(es): Silva, Ézio Marques da
Bacci, Leandro
Martins, Júlio Cláudio
Cláudio, Júlio
Campos, Mateus Ribeiro de
Picanço, Marcelo Coutinho
Abstract: The seasonal variation in natural mortality of phytophagous insects is determined by the relative importance of biotic and abiotic factors in agroecosystems. Knowledge regarding these factors throughout the year represents a key concern for IPM programmes. Seasonal population fluctuations of tomato pinworm, Tuta absoluta, led to an investigation of its natural mortality factors during the rainy season when the population level is low and during the dry season when population peaks occur. The aim of this study was to verify the seasonal variation in T. absoluta mortality factors in tomato crops. Immature stages of T. absoluta were obtained from laboratory rearing in the laboratory. These were taken to the field and monitored over two years. The mortality causes for each stage of insect development from egg to adult were assessed daily. Multiple biotic and abiotic mortality factors affected the immature T. absoluta stages such as rainfall, physiological disturbances, diseases, parasitoids and predators. The key T. absoluta mortality factor during summer–spring was predation. In addition, larvae predation correlated positively with temperature, wind velocity, photoperiod and rainfall. Nevertheless, during winter–fall, the key mortality factor was parasitism. Therefore, the critical stage for mortality was 3rd-­and 4thinstar larvae, being more vulnerable to natural control factors. Finally, the results showed the importance of vertical and horizontal action on natural mortality factors.
Palavras-chave: Climatic elements
Insect seasonality
Parasitoid
Physiological disturbance
Predator
Tomato borer
Editor: Journal of Applied Entomology
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1111/jen.12567
http://www.locus.ufv.br/handle/123456789/23970
Data do documento: Fev-2019
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
artigo.pdftexto completo1,5 MBAdobe PDFVisualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.