Amostragem do ácaro rajado Tetranychus urticae Koch (Acari: Tetranychidae) e eficiência de acaricidas no seu controle na cultura do algodoeiro irrigado
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2009-04
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Resumo
The aim of this work went to evaluate mitcide effectiveness, as well as developing of evaluation
methodology of twospotted spider mite Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) in reason of the offense
symptoms of mite attack in the cotton crop. It was also evaluated, the correlation among, number of twospotted spider mite
in cotton leaves, the size of the lesions and the number of leaves with lesions provocated by mite. The experiments were
installed on randomized complete design blocks. In the Experiment #1, diafentiuron dosages were tested. In the
Experiment #2, four application programs of chemical miticides (tolfenpyrad and diafentiuron) were evaluated. In the
Experiment #3, two miticides on twospotted spider mite control were evaluated. The number of twospotted spider mite on ten leaves was counted. It was accomplished, also, the account of leaves attributing them intensity notes of attack injury of
twospotted spider mite. Two or three applications with diafentiuron or tolfenpyrad were efficient in the twospotted spider
mite control. Positive correlation was observed among the twospotted spider mite number in the leaves and the number of
leaves with symptoms during the period evaluated, being significant between 10 and 15 days after the application. There is
correlation, also, among the number of two-spotted spider mite and the note of the injury symptom provocated by the
twospotted spider mite attack.
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Manejo de pragas, Tolfenpyrad, Diafentiuron, Gossypium hirsutum, Pest management, Tolfenpyrad, Diafentiuron, Gossypium hirsutum
Citação
PEIXOTO, Márcio Fernandes; BARBOSA, Rafael Vieira; OLIVEIRA, Romário Rodrigues da cunha; FERNANDES, Paulo Marçal; COSTA, Rommel Bernardes da. Amostragem do ácaro rajado Tetranychus urticae Koch (Acari: Tetranychidae) e eficiência de acaricidas no seu controle na cultura do algodoeiro irrigado. Bioscience Journal, Uberlândia, v. 25, n. 2, p. 24-32, mar./abr. 2009.