Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/1873
Título: Potencialidades de produtos naturais de origem vegetal como meio de protecção contra Sitophilus zeamais Motschulsky (Coleoptera: curculionidae) em milho armazenado
Outros títulos: Potential of botanical materials as protectants against Sitophilus zeamais Motschulsky (Coleoptera:curculionidae) on stored maize
Autor: Conceição, Carlos Alberto Francisco da
Orientador: Mexia, António Maria Marques
Barbosa, António da Fonseca Ferreira
Palavras-chave: sitophilus zeamais
botanical insecticides
insect control agents
screening
Data de Defesa: 2009
Resumo: Laboratory studies were carried out in order to evaluate the effects of some formulations from Mentha pulegium L., Lonchocarpus sericeus (Poir.) Kunt, Daphne gnidium L., Laurus nobilis L., Momordica charantia L., Nerium oleander L. and Ptaeroxylon obliquum (Thumb.) Radlk against adult insects of Sitophilus zeamais Motsch. on stored maize. The dusts from leaves of L. nobilis at 30% w/w provided 86% of mortality and reduced F1 progeny emergence up to 68%. At same concentration, dusts of pink flowers from N. oleander and leaves from L. sericeus reduced the F1 progeny up to 57% and 70%, reduced the developmental index and prolonged the developmental period by four and six days, respectively. The suspensions (2,0% v/v) from M. charantia, N. oleander and P. obliquum reduced the F1 progeny emergence up to 58%, 91% and 94% and the number of holes in grains by 75%, 91% and 97%, respectively. The methanol extracts were more effective than n-hexane extracts and affected the F1 progeny emergence and the developmental index. The essential oils of L. nobilis at 1,592μl/cm2 and 3,185μl/cm2 revealed 96% and 100% mortality, respectively. M. pulegium provided of 100% mortality at 0,159μl/cm2 and inhibited completely de F1 progenies. The oils of M. pulegium diluted in methanol at the 1:10 v/v provided 100% mortality (LC50 = 0,014μl) and at 1:100v/v reduced de F1 emergence and the developmental index. The diluted oils of L. nobilis in methanol and n-hexane did not affect any of the parameters studied.
Descrição: Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/1873
Aparece nas colecções:BISA - Teses de Doutoramento / Doctoral Thesis

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
TESE.pdf3,29 MBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.