Spatiotemporal Dynamics of Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) in Commercial Watermelon Crops
| Autor: | Danival José de Souza, Poliana S Pereira, Renato de Almeida Sarmento, Marcelo Coutinho Picanço, Thiago L. Costa, Joedna Silva, Tarcísio Visintin da Silva Galdino, Carlos H O Lima, Gil Rodrigues dos Santos |
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| Rok vydání: | 2018 |
| Předmět: |
Crops
Agricultural 0106 biological sciences Citrullus lanatus Population Whitefly Geostatistics Biology 010603 evolutionary biology 01 natural sciences Citrullus Hemiptera Crop Animals education education.field_of_study Ecology Agriculture General Medicine biology.organism_classification Cucurbitaceae 010602 entomology Agronomy Insect Science PEST analysis |
| Zdroj: | Journal of Economic Entomology. 111:1895-1903 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/toy110 |
| Popis: | Spatiotemporal dynamics studies of crop pests enable the determination of the colonization pattern and dispersion of these insects in the landscape. Geostatistics is an efficient tool for these studies: to determine the spatial distribution pattern of the pest in the crops and to make maps that represent this situation. Analysis of these maps across the development of plants can be used as a tool in precision agriculture programs. Watermelon, Citrullus lanatus (Thunb.) Matsum. and Nakai (Cucurbitales: Cucurbitaceae), is the second most consumed fruit in the world, and the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is one of the most important pests of this crop. Thus, the objective of this work was to determine the spatiotemporal distribution of B. tabaci in commercial watermelon crops using geostatistics. For 2 yr, we monitored adult whitefly densities in eight watermelon crops in a tropical climate region. The location of the samples and other crops in the landscape was georeferenced. Experimental data were submitted to geostatistical analysis. The colonization of B. tabaci had two patterns. In the first, the colonization started at the outermost parts of the crop. In the second, the insects occupied the whole area of the crop since the beginning of cultivation. The maximum distance between sites of watermelon crops in which spatial dependence of B. tabaci densities was observed was 19.69 m. The adult B. tabaci densities in the eight watermelon fields were positively correlated with rainfall and relative humidity, whereas wind speed negatively affected whiteflies population. |
| Databáze: | OpenAIRE |
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