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Titre :
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Partial application of insecticide to broad bean (Vicia fabae) as a means of controlling bean aphid (Aphis fabae) and bean weevil (Sitona lineatus)
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Auteurs :
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A. Ward ;
S. Morse
|
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Type de document :
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article/chapitre/communication
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Année de publication :
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1995
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Format :
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239-249
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Langues:
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= Anglais
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Mots-clés:
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Vicia fabae
;
Aphis fabae
;
Sitona lineatus
;
insecticide
;
multilines
;
Efficacite du traitement
;
Essai exterieur
;
Leguminosae
;
Vicia faba
;
Aphididae
;
Curculionidae
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Résumé :
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The effects upon the nature of insect pest attack of treating only a certain proportion (0%, 25%, 50%, 75% and 100%) of the plants in a field bean (Vicia fabae) stand, with a systemic insecticide (aldicarb as Temik 10 G, Rhone Poulenc Drugs Ltd; 10% a.i.) were assessed. Numbers of both the black bean aphid (Aphis fabae) and the bean weevil (Sitona lineatus) were proportionally reduced on untreated plants in plots with an increasing proportion of insecticide treated plants. A similar response was also observed with bean weevil leaf damage scores. It is postulated that the observed effects are due to a reduction in insect numbers per plot brought about by redistribution of insects after initial invasion. Insects initially alighting on untreated plants later migrate to treated plants and either die or leave the plot altogether. This resulted in proportionally fewer insects on the untreated plants than would be expected.
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Source :
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Annals of Applied Biology - 0003-4746, vol. 127, n° 2
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