Como desenvolver o potencial do acaro predador Phytoseiulus macropilis para controlar o ácaro-rajado em plantas de morango? / How to realize the potential of the predatory mite Phytoseiulus macropilis to control two-spotted spider-mites in strawberry?

AUTOR(ES)

Hamilton Gomes de Oliveira

DATA DE PUBLICAÇÃO

2006

RESUMO

Biological control using naturally occurring predators has been attempted. In Brazil, field studies showed that the indigenous predatory mite Phytoseiulus macropilis (Banks) is constantly found associated with spider mites in strawberry crops in the Minas Gerais state. This predatory mite occurrence is high on abandoned strawberry fields, but on plants that are yet commercially explored and are sprayed with acaricides the occurrence of P. macropilis is less frequent. So, spider mite control is done through acaricides application in the area studied. The most applied acaricides in the area are abamectin and dimethoate. In this thesis it was studied the capacity of P. macropilis to be used as biological control agent against T. urticae in strawberry fields. It was evaluated i) the capacity of P. macropilis to control local population of T. urticae, ii) the lethal and sublethal effects of the acaricides abamectin and dimethoate on T. urticae and iii) studied by use of olfactory experiment, acaricides effects on the capacity of the P. macropilis to detect volatiles from strawberry infested plants with T. urticae. The results showed that P. macropilis is able to control T. urticae population and its reproduction and growth rates are high. However, Acaricides application is very harmful to P. macropilis. Predatory mite that survived the acaricide application have lower population growth rate than T. urticae when exposed to the same acaricide dose. Besides, surviving predators became unable to detect volatiles from infested plants with T. urticae.

ASSUNTO(S)

controle químico entomologia agricola predators sublethal effects tetranychus urticae predadores acaricidas phytoseiulus macropilis plant-insect interactions acaricides tetranychus urticae phytoseiulus macropilis efeitos subletais interação inseto-planta chemical control

Documentos Relacionados

• Salicylic acid: resistance inducer to two-spotted spider mite in strawberry crop
• INTERACTION BETWEEN THE COTTON BOLLGARDTM, THE TWOSPOTED SPIDER MITE, Tetranychus urticae KOCH (ACARI: TETRANYCHIDAE) AND ITS PREDATORY MITE Phytoseiulus macropilis (BANKS) (ACARI: PHYTOSEIIDAE).
• Induced resistance to the two-spotted mite Tetranychus urticae Koch (Acari, Tetranychidae) in strawberry plants
• Response of the predatory mite Phytoseiulus macropilis (Banks) to volatiles produced by strawberry plants in response to attack by Tetranychid mites (Acari: Phytoseiidae: Tetranychidae)
• Toxicidade de formulações de nim (Azadirachta indica A. Juss.) ao ácaro-rajado e a Euseius alatus De Leon e Phytoseiulus macropilis (Banks) (Acari: Phytoseiidae)