Influência de relações nitrogênio/potássio na preferência para alimentação e oviposição de Bemisia tabaci (Genn.) biótipo B na cultura do tomateiro
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Data
2009
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Resumo
Bemisia tabaci biotype B presently constitutes a great threat not only for the tomato crop but to several other crops.
The objective of this research was to evaluate the influence of the plant nutrition with different ratios nitrogen/
potassium, on B. tabaci biotype B behavior for feeding and oviposition. The experiment was conducted at Escola de
Agronomia e Engenharia de Alimentos/UFG, Goiania, Goias, Brasil. Tests with free and no-choice of the insect
feeding were conducted. The first one was carried out on randomized blocks design and the second one with a
completely randomized design. Each treatment had four replications, with one plant per pot. The treatments were
the ratios nitrogen/potassium: 1/1, 2/1, 4/1, 8/1, 1/2, 1/4 and 1/8. Five evaluations on the observation of the behavior
of B. tabaci biotype B in relation to the feeding preference were accomplished: 3, 27, 51, 75 and 99 hours after the
insect infestation. Leaves were collected at four days after the insect infestation, and appraised in laboratory for
oviposition analysis. The different ratios nitrogen/potassium used in the tomato fertilization did not induce any
effect at the feeding or oviposition of B. tabaci biotype B behavior.
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Equilíbrio nutricional, Trofobiose, Seleção hospedeiro, Nutritional balance, Trophobiose, Selection host
Citação
OLIVEIRA, M. F. ; OLIVEIRA, H. A. S. S.; VELOSO, V. R. S. ; FERNANDES, P. M. ; OLIVEIRA JUNIOR, J. P. Influência de relações nitrogênio/potássio na preferência para alimentação e oviposição de Bemisia tabaci (Genn.) biótipo B na cultura do tomateiro. Agrociencia Uruguay, Montevideo, v. 13, n. 1, p. 19-26, 2009.