Data/hora: 19/06/2024 03:21:13

Biblioteca(s): | Embrapa Soja.
Data corrente: | 25/05/1993
Data da última atualização: | 06/07/2010
Autoria: | PEDIGO, L. P.; HIGLEY, L. G.; DAWIS, P. M.
Afiliação: | Iowa State University - Ames, Iowa 50011 (USA).
Título: | Concepts and advances in economic thresholds for soybean entomology.
Ano de publicação: | 1989
Fonte/Imprenta: | In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.
Volume: | t.3
Páginas: | p.1487-1493.
Idioma: | Inglês
Conteúdo: | Population assessment and decision making are the key elements in insect pest management. Among the approaches used in decision making, none has been more prevalent than the economic-injury level concept of V. M. Stern and his coworkers. This concept has been refined significantly since its inception, and soybean insect researchers have been in the forefront of its development. Current research in this area emphasizes pest-injury-to-yield relationships, interactions of insects among themselves and with other pest types, and refinement of economic threshold for individual insect species.Probably the greatest need on a worldwide basis is development of practical sampling programs and establishment of valid economic thresholds for major pests. Approaches to development of economic tresholds for soybean insect management have included both subjective and objective methods. A new application of time-sequential sampling is proposed as an alternative means of developing objective and practical economic tresholds. An exemple of this new approach with larvae of the soybean defoliator, Plathypena scabra, (Lepidoptera: Noctuidae), es presented. Additionally, limitations to economic tresholds and directions for future development are discussed.
Palavras-Chave: | Aspecto economico; Economic aspect; Insect; Soybean.
Thesagro: | Entomologia; Inseto; Soja.
Thesaurus Nal: | entomology.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)