Biologia comparada de Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: noctuidae) em milho e em cultivares de algodoeiro
Carregando...
Arquivos
Data
2006-02-21
Autores
Sarro, Fernanda Bueno [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Considerando que ao longo de muitos anos o algodão foi cultivado nos estados de São Paulo e Paraná e a lagarta do cartucho do milho Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) nunca foi considerada uma praga importante para essa cultura, apesar da proximidade com a cultura do milho. É provável que os cultivares tradicionalmente utilizados nessa região sejam desfavoráveis ao desenvolvimento dessa espécie. Partindo-se desta hipótese este trabalho foi realizado com o objetivo de comparar o desenvolvimento biológico e a utilização do alimento pelas lagartas de S. frugiperda, nos cultivares de algodão atualmente utilizados na região centro-oeste, onde esse inseto vem sendo relatado como uma praga do algodoeiro. Os cultivares de algodão DELTAOPAL, FIBERMAX 966, DP 4049, CNPA ITA 90 foram comparados com os cultivares tradicionalmente utilizados em São Paulo: IAC 23 e IAC 24 e com o cultivar de milho AL 25. Foram realizados três experimentos seguindo o delineamento inteiramente casualizado com 3 tratamentos e 5 repetições, com 10 lagartas individualizadas por repetição, provenientes de uma criação de laboratório em dieta artificial. O primeiro experimento comparou os cultivares de algodão DELTAOPAL e DP 4049, o segundo os cultivares FIBERMAX 966 e CNPA ITA 90 e o terceiro IAC 23 e IAC 24. Em todos os 2 experimentos o milho foi utilizado como padrão de comparação. Os dados referentes ao desenvolvimento biológico e aos índices de utilização dos cultivares foram submetidos à análise de variância conjunta e as médias comparadas pelo teste Tukey à 5 % de probabilidade. A análise dos dados confirmou a hipótese inicial, visto que os cultivares tradicionalmente utilizados em São Paulo e Paraná, IAC 23 e IAC 24, são mais desfavoráveis para o desenvolvimento dessa espécie, tanto em relação ao milho quanto aos outros cultivares de algodão. Os... .
Considering that cotton crops have been harvested in the States of São Paulo and Paraná, Brazil, for a long period the fall armyworm Spodoptera frugiperda (J.E. Smith, 1707) (Lepidoptera: Noctuidae) was never considered an important cotton pest, despite its presence next to maize crops. It is possible that traditional cultivars from these areas are less favorable to the development of S. frugiperda. So this research was carried out aiming to compare the biological development and food utilization by fall armyworm larvae on the cotton cultivars harvested in the middle-west region of Brazil, were this species is referred as an important pest. The DELTAOPAL, FIBERMAX 966, DP 4049, CNPA ITA 90 cotton cultivars were compared to the traditional cultivars used in São Paulo: IAC23 and IAC24 and with the maize cultivar AL25. Three experiment were established following randomized design with 3 treatment and 5 replications, with 10 larvae individualized per each replication. The larvae were obtained from the mass rearing kept in artificial diet in the laboratory conditions. The first experiment compared the cotton cultivars DELTAOPAL and DP 4049, the second compared the cultivars FIBERMAX 966 and CNPA ITA 90 and the third IAC23 and IAC24. In all experiments the maize cultivar was used as comparison pattern. The data from the biological development and the food utilization indexes of cultivars were submitted to combined variance analyses and the mean values were compared by Tukey test at 5% of probability. The data analyses confirmed the initial hypotheses, because the cotton cultivars traditionally used in São Paulo and Paraná, IAC23 and IAC24, are less favorable to the development of fall armyworm, as in relation to the maize as in relation the others cotton cultivars. The DELTAOPAL and DP 4049 cotton 4 cultivars are similar hosts at maize. The FIBERMAX 966 and CNPA ITA 90 cultivars are more... (Complete abstract, click electronic address below).
Considering that cotton crops have been harvested in the States of São Paulo and Paraná, Brazil, for a long period the fall armyworm Spodoptera frugiperda (J.E. Smith, 1707) (Lepidoptera: Noctuidae) was never considered an important cotton pest, despite its presence next to maize crops. It is possible that traditional cultivars from these areas are less favorable to the development of S. frugiperda. So this research was carried out aiming to compare the biological development and food utilization by fall armyworm larvae on the cotton cultivars harvested in the middle-west region of Brazil, were this species is referred as an important pest. The DELTAOPAL, FIBERMAX 966, DP 4049, CNPA ITA 90 cotton cultivars were compared to the traditional cultivars used in São Paulo: IAC23 and IAC24 and with the maize cultivar AL25. Three experiment were established following randomized design with 3 treatment and 5 replications, with 10 larvae individualized per each replication. The larvae were obtained from the mass rearing kept in artificial diet in the laboratory conditions. The first experiment compared the cotton cultivars DELTAOPAL and DP 4049, the second compared the cultivars FIBERMAX 966 and CNPA ITA 90 and the third IAC23 and IAC24. In all experiments the maize cultivar was used as comparison pattern. The data from the biological development and the food utilization indexes of cultivars were submitted to combined variance analyses and the mean values were compared by Tukey test at 5% of probability. The data analyses confirmed the initial hypotheses, because the cotton cultivars traditionally used in São Paulo and Paraná, IAC23 and IAC24, are less favorable to the development of fall armyworm, as in relation to the maize as in relation the others cotton cultivars. The DELTAOPAL and DP 4049 cotton 4 cultivars are similar hosts at maize. The FIBERMAX 966 and CNPA ITA 90 cultivars are more... (Complete abstract, click electronic address below).
Descrição
Palavras-chave
Algodão - Cultivo, Lagarta desfolhadora, Lagarta militar, Biologia, Índices nutricionais, Nutrição quantitativa, Fall armyworm, Biology, Nutrucional index, Quantitative nutrition
Como citar
SARRO, Fernanda Bueno. Biologia comparada de Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: noctuidae) em milho e em cultivares de algodoeiro. 2006. viii, 98 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2006.