Data/hora: 16/06/2024 20:14:10

Provedor de dados: | 44
País: | Brazil
Título: | Application rate trials with a nuclear polyhedrosis virus to control Spodoptera frugiperda (Smith) on maize
Autores: | Cruz,Ivan; Figueiredo,Maria L. C.; Valicente,Fernando H.; Oliveira,António C.
Data: | 1997-04-01
Ano: | 1997
Palavras-chave: | Insecta; Fall armyworm; Baculovirus; Biological control.
Resumo: | Different concentrations of nuclear polyhedrosis virus were applied as aqueous suspensions using a tractor mounted or a backpack-manual sprayer to control Spodoptera frugiperda (Smith) larvae on maize (Zea mays L.). Larval mortality varied with the application equipment. For the tractor-mounted sprayer application of at least 2.5 x 10(12) P.I.B./ha was necessary to attain a control comparable to that obtained with the backpack-manual sprayer application (70.2%). For this application method it can be used the dose of 2.5 x 10(11) PI.B./ ha, butNPV persistence was very short. A greaterNPV persistence was obtained with doses over 1.25 x 10(12) P.I.B./ha (93.4% mortality). The occurrence of parasitoids in the experimental area increased larval mortality rate (16.4%), independent of the application method. Among the parasitoids, the most prevalent was Campoletis flavicincta (Ashmead) (53.0%), followed by Chelonus insularis (Cresson) (31.3%), and Eiphosoma spp. (15.6%).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000100019
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S0301-80591997000100019
Formato: | text/html
Fonte: | Anais da Sociedade Entomológica do Brasil  v.26 n.1 1997
Fonte: | info:eu-repo/semantics/openAccess