Potencial de Amblyseius herbicolus (Acari: Phytoseiidae) para o controle biológico de Polyphagotarsonemus latus (Acari: Tarsonemidae) em pimenta malagueta

• Autor(a) principal: Cruz, Fredy Alexander Rodríguez
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3906
• topic: Controle biológico; Phytoseiidae; Polyphagotarsonemus latus; Pimenta; Biological control; Phytoseiidae; Polyphagotarsonemus latus; Pepper; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE::ENTOMOLOGIA AGRICOLA

The broad mite Polyphagotarsonemus latus (Banks 1904) is an important pest of economic impact on several crops and has worldwide distribution. Generally, its control is based on chemical applications, with all problems derived from misuse. An alternative to chemical control is biological control. The main natural enemies of phytophagous mites are predatory mites from Phytoseiidae family. The phytoseiid Amblyseius herbicolus (Chant 1959) is frequently found associated with broad mite on chili pepper plants in the Zona da Mata, Minas Gerais, Brazil. Despite his record, little is know about its predation ability and performance when fed on broad mite. Predation and oviposition rates of A. herbicolus on P. latus stages and its potential in reducing pest populations was studied. Also, biological and reproductive parameters of A. herbicolus fed on P. latus and pollen diets were investigated. Additionally, we studied the predator ability to locate prey through volatiles emitted by plants infested whit P. latus. In Chapter 1, the ability of A. herbicolus to prey and lay eggs at stages of P. latus, as well as its ability to reduce P. latus populations on chili pepper plants in greenhouse conditions was evaluated. In chapter 2, we determined biological and reproductive parameters of A. herbicolus on three diets P. latus, castor bean (Ricinus communis L.) and sunnhemp (Crotalaria juncea L.) pollen. In chapter 3, the attraction of A. herbicolus to volatiles synthesized as response to P. latus chili pepper plants hervibory was studied in Y tube olfactometer. A. herbicolus has ability to prey and lay eggs when fed in all stages of P. latus. Predation rate was higher on P. latus on pupal stage. Oviposition rate was higher when A. herbicolus fed on adults and larvae of P. latus. In the greenhouse the addition of A. herbicolus on chili pepper plants provided populational reduction of P. latus. The intrinsic growth rate (rm) was higher on diet of castor bean pollen diet, followed by diet of P. latus, but significant different was observed whit sunnhemp pollen diet. A. herbicolus had the ability to respond and use of volatiles emitted by chili pepper plants attacked by P. latus. Amblyseius herbicolus showed high rate of predation and oviposition rate when fed on P. latus stages. The predator was able use and has reproductive success on diets tested. A. herbicolus was able to respond to pepper plants infested with P. latus.