[Influence of pesticides on useful entomofauna in spring rape crops]
2007
Gurikova, E.I., Belarus State Academy of Agriculture, Gorki (Belarus)
There was a problem to draw ecologically proved conclusion to separate receptions of summer rape chemical protection from harmful objects. In 2004-2006 in the Belarus State Academy of Agriculture on the trial field Tushkovo research with a new preparation Krujzer rape, which possess complex, insectofungicide protective action, were carried out. The obtained data on insecticide application in the way of shoot sprayings testify to decrease of the general quantity of carabid’s caught on 50-62 insects for a season. Application of preparations of insecticidal actions by seed treatment differed more favorable action on number of useful entomofauna. Application of chemical preparations in a budding phase has resulted to decreasing of useful biota number on 30-40%. At Fastak use in doze of 0,15 l/ha twice the percent of decrease in number entomocoenosis in flowering was the greatest and has made 73,2%
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