The occurrence of beneficial insects after spinosad application in control of ecological potato crops
Jolanta Kowalska
j.kowalska@ihar.edu.plZakład Metod Biologicznych i Kwarantanny, Instytut Ochrony Roślin — PIB, Poznań (Poland)
Dariusz Drożdżyński
Zakład Badania Pozostałości Środków Ochrony Roślin, Instytut Ochrony Roślin — PIB, Poznań (Poland)
Abstract
Organic farming as the specific system of farming and production of food encompasses a whole complex of positive measures influencing the environment and biodiversity. Organic crops can be considerably damaged by numerous pests. Their activity effects in the reduction of plant quality and this causes economic losses. To control harmful insects approved insecticides are recommended for using in organic farming. The occurrence of beneficial insects is an indispensable factor supporting farmers in their efforts to protect ecological crops against pests. Thereby the natural pressure is enhanced. In the reported field experiment the natural insecticide spinosad, which effectively controls Colorado potato beetles, appeared to be harmless for beneficial insects occurring on the protected organic potatoes. Among the beneficial insects, ladybirds were the predominant predators. Numerous beneficial insects were found on the spinosad — treated plots 25 days after tratment. The plant abundant was considered as the factor creating a suitable habitat for natural enemies of aphids.
Keywords:
spinosad, beneficial insects, potato, organic farmingReferences
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Authors
Jolanta Kowalskaj.kowalska@ihar.edu.pl
Zakład Metod Biologicznych i Kwarantanny, Instytut Ochrony Roślin — PIB, Poznań Poland
Authors
Dariusz DrożdżyńskiZakład Badania Pozostałości Środków Ochrony Roślin, Instytut Ochrony Roślin — PIB, Poznań Poland
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