Data/hora: 15/06/2024 01:03:54

Biblioteca(s): | Embrapa Soja.
Data corrente: | 29/01/2001
Data da última atualização: | 09/03/2006
Autoria: | GAZZONI, D. L.; CORSO, I. C.
Título: | Variability of soybean insect sampling methods.
Ano de publicação: | 2000
Fonte/Imprenta: | In: INTERNATIONAL CONGRESS OF ENTOMOLOGY, 21., 2000, Foz do Iguassu. Abstracts... Londrina: Embrapa Soja, 2000.
Volume: | v.2
Páginas: | p.678.
Idioma: | Inglês
Conteúdo: | The beat cloth is the official recommended methodology for samplingsoybean insectspests, both for experimental purposes or for insect population assessment on soybean fields where Insect Pest Management Programs are carried out. The shock method was develop from the beat cloth by substituting the plants beat and shaking by the application of a powerful and broad spectrum insecticide at high rates, aiming to quickly kill allinsects on the sampling area. Dead insects are collected on a cloth placed on the soil, between soybean rows. The two sampling methods plus the sweep net were compared in a set of five experiments set up in the Londrina (Brazil) region. The sampled area wassimilar for all the methods, and collected insects were placed on plastic bags and transferred to the Embrapa Soja entomology laboratory for counting. Results indicated that the beat cloth and the shock methods are equivalent for sampling the VBC, Anticarsia gemmatalis and also for the main stink bugs that attack soybeans, while the sweep net consistently collected less insects. The time required for sampling a given area was not different when using beat cloth or the shock method, while the time needed for evaluation of the samples under laboratory conditions was reduced in 30-50% as compared to the beat cloth or the net. The variability of the samplings by each method was measured by using an indicator index with bionomial distribution, obtained from the plotting of the number of each species of insects collected on each sampling date. Results indicated a significantly higher variability when using the sweep net, for all the considered insects. Beat cloth and the shock method showed equivalent variability for A. gemmatalis, but estimatesfor stink bugs samplings were more precise when using the shok method.
Palavras-Chave: | Beat cloth; Brasil; Inseto Praga; Pest insects; Shock method; Soybean.
Thesagro: | Soja.
Thesaurus Nal: | Brazil.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (18177-1) - UMT - PL - -- - RF 339 -  -  - DIS