Data/hora: 13/06/2024 12:33:03

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	02/05/2005	
Data da última atualização: 	02/08/2018	
Autoria: 	LEITE, G. L. D.; PICANÇO, M.; JHAM, G. N.; MOREIRA, M. D.	
Afiliação: 	Germano Leão Demolin Leite, Universidade Federal de Minas Gerais - UFMG/Instituto de Ciências Agrárias; Marcelo Picanço, Universidade Federal de Viçosa - UFV/Departamento de Biologia animal; Gulab Newandram Jham, Universidade Federal de Viçosa - UFV/Departamento de Química; Márcio Dionízio Moreira, Universidade Federal de Viçosa - UFV/Departamento de Biologia animal.	
Título: 	Whitefly population dynamics in okra plantations.	
Ano de publicação: 	2005	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 40, n. 1, p. 19-25, jan. 2005	
Idioma: 	Inglês	
Notas: 	Título em português: Dinâmica populacional de mosca-branca em quiabo.	
Conteúdo: 	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) occurred on bottom, middle and apical parts of 30 plants/plantation (one leaf/plant). Plants senescence and natural enemies, mainly Encarsia sp., Chrysoperla spp. and Coccinellidae, were some of the factors that most contributed to whitefly reduction. The second okra plantation, 50 m apart from the first, was strongly attacked by whitefly, probably because of the insect migration from the first to the second plantation. No significant effects of the plant canopy on whitefly eggs and adults distribution were found. A higher number of whitefly nymphs was found on the medium part than on the bottom part.	
Palavras-Chave: 	fenologia da planta; inimigos naturais; plant phenology.	
Thesagro: 	Abelmoschus Esculentus; Bemisia Tabaci; Temperatura.	
Thesaurus Nal: 	natural enemies; temperature.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/107920/1/Whitefly.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (30487-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS