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| Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
| Kale Brassica oleracea var. acephala is attacked by whitefly Bemisia tabaci, aphid Brevicoryne brassicae and Thrips tabaci. One of the main reasons for extensive insecticide application is the lack of information about factors that control insect population. The objectives of this study were to investigate the relationships between predators and parasitoids, organic compound leaves, levels of leaf nitrogen and potassium, total rainfall, relative humidity, sunlight and median temperature on the abundance of whitefly, aphid, and thrips in kale genotype "Talo Roxo". The beating tray method, direct counting and magnifying lens were used to estimate the number of these pests, predators and parasitoids. Median temperature, sunlight and relative humidity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Population dynamics; Nonacosane; Climatic factors; Braconidae. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000300001 |
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| Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
| The objective of this work was to investigate the relationships between predators and parasitoids, leaf chemical composition, levels of leaf nitrogen and potassium, total rainfall, relative humidity, daylight and median temperature on the intensity of whitefly, aphid, and thrips attack on cabbage. Whitefly, aphids and thrips population tended to proliferate in the final stage of plant or reached a peak population about 40 days after plantation. The whitefly and thrips tended to increase with an increase in the median temperature. A dependence of Cheiracanthium inclusum and Adialytus spp. populations on whitefly and aphids populations, respectively, was observed. No significant effect was detected between K and nonacosane leaf content and aphid population.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia tabaci; Brevicoryne brassicae; Thrips tabaci; Brassica oleracea; Temperature; Nonacosane. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001000003 |
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| Leite,Germano Leão Demolin; Picanço,Marcelo; Jham,Gulab Newandram; Moreira,Márcio Dionízio. |
| The control of whitefly Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae) on okra (Abelmoschus esculentus L.) consists primarily in the use of insecticides, due to the lack of information on other mortality factors. The objective of this study was to evaluate the spatial and temporal population dynamics of the whitefly B. tabaci biotype B on two successive A. esculentus var. "Santa Cruz" plantations. Leaf chemical composition, leaf nitrogen and potassium contents, trichome density, canopy height, plant age, predators, parasitoids, total rainfall and median temperature were evaluated and their relationships with whitefly on okra were determined. Monthly number estimates of whitefly adults, nymphs (visual inspection) and eggs (magnifying lens)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia tabaci; Abelmoschus esculentus; Natural enemies; Plant phenology; Temperature. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000100003 |
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