Data/hora: 02/06/2024 02:20:08

Provedor de dados: | 63
País: | Brazil
Título: | Development and silk production by silkworm larvae after topical application of methoprene
Autores: | Miranda,José Ednilson; Bortoli,Sérgio Antonio de; Takahashi,Roque.
Data: | 2002-09-01
Ano: | 2002
Palavras-chave: | Bombyx mori; JHA; Sericulture; Juvenile hormone.
Resumo: | Juvenile hormone analogues have been tested as insect growth regulators in silkworm (Bombyx mori), seeking an increment of silk production. These chemical products, when applied in small or moderate rates, promote the extension of the last larval instar. To understand the physiologic consequences on silk production by the silkworm strain C115 x N108, the application of methoprene, a juvenile hormone analogue, was performed to evaluate its effects on larval development and silk production. Methoprene was topically applied 48h after the fourth larval ecdysis, on the dorsal integument of the 2nd thoracic segment of the insects, at seven rates between 0 and 20 ng a.i. Methoprene influenced positively the duration of the fifth instar and the weight gain of the insects. The application of 1ng methoprene resulted in the heaviest silkglands, cocoons, shell cocoons and pupae weights. Comparatively to the control, the increment on silk production (approximately 24%) by the use of 1ng methoprene was more accentuated than the corresponding negative effects on the cocooning rate (approximately 12%).
Tipo: | Info:eu-repo/semantics/report
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300026
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162002000300026
Formato: | text/html
Fonte: | Scientia Agricola  v.59 n.3 2002
Fonte: | info:eu-repo/semantics/openAccess