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 Printable version |
Biocide effect of crude aqueous extracts of
Capsicum frutescens,
Melia azedarach and
Peganum harmala on in-orchard
Euphyllura olivina Costa (Homoptera, Psyllidae) |
Cahiers Agricultures. Volume 20, Number 6, 463-7, Novembre-Décembre 2011, Études originales
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 Résumé
Article gratuit
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Author(s) : Hamid Meftah, Ahmed Boughdad, Aziz Bouchelta |
Summary : Seeking alternative control methods against the olive psyllid,
Euphyllura olivina, crude aqueous extracts of
Capsicum frutescens, Melia azedarach and
Peganum harmala were used on trees infested with the pest. Fifty grams of each dried plant extract/liter of water were sprayed. Trees treated with water or dimethoate were used respectively as control or standard. The population densities of the psyllid were counted 2, 6 and 14 days after treatment. The extracts significantly affected the psyllid populations. According to the observation period, the densities of the insect varied from 0 to 64, 2 to 90 and from 0 to 83 individuals/olive branch for
C. frutescens, M. azedarach and for
P. harmala, respectively. In the controls blocks, the psyllid densities ranged from 0 to 9 and from 32 to 101 individuals/olive branch for dimethoate and water, respectively. The results are discussed in the perspective of olive pest management. |
Keywords : biopesticides, fruit extracts,
Olea europaea, orchards, pathology, vegetal productions |
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