Data/hora: 24/06/2024 15:59:28

Biblioteca(s): | Embrapa Agropecuária Oeste; Embrapa Gado de Corte; Embrapa Gado de Leite.
Data corrente: | 11/08/1992
Data da última atualização: | 14/11/2008
Autoria: | VALERIO, J. R.
Título: | Ovipositional preference and biology studies of the fall armyworm, Spodoptera frugiperda (J.E.Smith), utilizing four varieties of bermudagrass, Cynodon dactylon (L.) Pers.
Ano de publicação: | 1978
Fonte/Imprenta: | 1978.
Páginas: | 61 f.
Idioma: | Inglês
Notas: | Tese (Master of Science in the Department of Entomology) -  Mississippi State University, Mississippi.
Conteúdo: | Ovipositional preference and some aspects of the biology of the fall armyworm, Spodopter frugiperda (J.E. Smith) were studied. Four  varieties of Bermudagrass, Cynodon dactylon (L.) Pers. (Alicia, Callie, Coastal, and Common), were utilized in both studies. The biology study was performed under three different constant temperature regimes (20, 25, and  30ºC). For the ovipositional preference study, the total number of egg clusters, the total number of eggs, mean area of clusters and mean number of eggs per cluster were record. Almost three times more clusters and eggs were laid on callie Bermudagrass than on the other three varieties. There was no significant  difference between varieties as to the mean area of clusters or the mean number of eggs per cluster. There was difference in the size of the leaves between Callie, Alicia, Coastal, and Common Bermudagrass. The means of the total number of clusters and the means of the total number of eggs suggested the possibility of a direct relationship between oviposition and size of the leaves. For the biology study, differences established between grasses for larval period, pupal wigth, and pupal period were temperature, as  well as on occasion sex dependent. No significant difference was observed between grasses for growth index, survival rate, percentage  of larvae attaining the pupal and adult stages, and female fecundity. A higher percentage of adults with abnormal wings was at 20ºC. The sex ratio held consistently around one to one for each grass and/or temperature. A temperature of 30ºC proved to be the olptimum for immature stages; and 25ºC was best for adults.
Thesagro: | Cynodon Dactylon; Pastagem; Praga; Spodoptera Frugiperda.
Categoria do assunto: | --
Registro original: | Embrapa Agropecuária Oeste (CPAO)

Exemplares:

CPAO - (25212-1) - ADD - TS - -- - T 29/78 -  - 81.000038 - DIS
CNPGC - (6945-1) - ADD - TS - PP - T172/78 -  - T172/78 - DIS
CNPGL - (8660-1) - ADD - TS - PP - 1978.00047 - VAL - 1978.00047 - DIS