Aspectos biológicos e dano de Diatraea saccharalis (fabr., 1794) (Lepidoptera: Pyralidae) em sorgo cultivado sob diferentes doses de nitrogênio e potássio
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Data
2005-04-01
Autores
Bortoli, Sergio Antônio de [UNESP]
Dória, Háyda Oliveira Souza
Albergaria, Nuno Miguel Mendes Soares [UNESP]
Botti, Maurício Vladimir
Título da Revista
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Título de Volume
Editor
Editora da Universidade Federal de Lavras (UFLA)
Resumo
O presente trabalho teve como objetivo avaliar a influência da adubação da cultura do sorgo Sorghum bicolor (L.) Moench, na biologia da broca da cana-de-açúcar Diatraea saccharalis (Fabr., 1794) (Lepidoptera: Pyralidae). Para isso foi utilizado sorgo da cultivar Rubi-Asgrow, plantado em vasos utilizando-se diferentes doses de fertilizantes e mantidos em casa-de-vegetação. Os tratamentos utilizados (doses de NK) foram: N1 = 0-200 ppm; N2 = 50-200 ppm; N3 = 100-200 ppm; N4 = 200-200 ppm; N5 = 400-200 ppm; K1 = 200-0 ppm; K2 = 200-50 ppm; K3 = 200-100 ppm; K4 = 200-200 ppm; e K5 = 200-400 ppm. de modo geral, pode-se concluir que doses de 50 a 200 ppm de N promoveram o desenvolvimento normal das larvas de D. saccharalis, sendo que as menores porcentagens de dano foram verificadas nas menores doses; para o potássio, quanto maior a dose, menor foi o dano causado pelas lagartas, apesar de favorecer o desenvolvimento da mesma.
This work was carried out to evaluate the influence of the fertilization of sorghum, Sorghum bicolor (L.) Moench, on the stem borer Diatraea saccharalis (Fabr., 1794) (Lepidoptera: Pyralidae) biology. It was used the variety Rubi-Asgrow. The treatments were (NK doses): N1 = 0-200 ppm; N2 = 50-200 ppm; N3 = 100-200 ppm; N4 = 200-200 ppm; N5 = 400-200 ppm; K1 = 200-0 ppm; K2 = 200-50 ppm; K3 = 200-100 ppm; K4 = 200-200 ppm and K5 = 200-400 ppm. It was possible to conclude that nitrogen doses from 50 to 200 ppm provide a normal development for D. saccharalis larvae, although the lowest percentage of damage was verified with the lowest dose; while for the potassium, the highest dose favoured the caterpillars development, but less damage was observed on the plants.
This work was carried out to evaluate the influence of the fertilization of sorghum, Sorghum bicolor (L.) Moench, on the stem borer Diatraea saccharalis (Fabr., 1794) (Lepidoptera: Pyralidae) biology. It was used the variety Rubi-Asgrow. The treatments were (NK doses): N1 = 0-200 ppm; N2 = 50-200 ppm; N3 = 100-200 ppm; N4 = 200-200 ppm; N5 = 400-200 ppm; K1 = 200-0 ppm; K2 = 200-50 ppm; K3 = 200-100 ppm; K4 = 200-200 ppm and K5 = 200-400 ppm. It was possible to conclude that nitrogen doses from 50 to 200 ppm provide a normal development for D. saccharalis larvae, although the lowest percentage of damage was verified with the lowest dose; while for the potassium, the highest dose favoured the caterpillars development, but less damage was observed on the plants.
Descrição
Palavras-chave
Sugarcane borer, Sorghum bicolor, Biology, Insecta, Broca da cana, Sorghum bicolor, Biologia, Insecta
Como citar
Ciência e Agrotecnologia. Editora da Universidade Federal de Lavras (UFLA), v. 29, n. 2, p. 267-273, 2005.