The insecticide Coragen 20 SK a new solution to fight against Colorado potato beetle (Leptinotarsa decemlineata Say.)

Daniela Atanasova, Yanko Dimitrov, Nedyalka Palagacheva

Abstract: Having in mind that Coragen 20 SK is an insecticide of a new chemical type with a wide spectrum of effectiveness to control a wide range of crop pests, this research aims to determine the effectiveness of Coragen 20 SK and the possibilities to include it amongst the insecticides fighting against Colorado potato beetle (Leptinotarsa decemlineata Say.). This will allows to be restored the sensitivity of populations which have developed varying levels of resistance. Research activities have been carried out on the Training and Experimental Fields of the Agricultural University – Plovdiv. Three doses of Coragen 20 SK have been tested, i.e. 12.5 ml/da, 16 ml/da and 20 ml/da, to find its maximum effectiveness. As a model has been used Nurele Dursban – an insecticide used for many years to fight against Colorado potato beetle. Based on the results it has been found out that Coragen 20 SK in a dose of 20 ml/da can successfully fight against its larvae and against the Colorado potato beetle to be applied in a dose of 16 ml/da. The preparation can be enlisted as one of the methods to reduce the risk of development of resistant populations.

Keywords: Colorado potato beetle; Coragen 20 SK; insecticides; Leptinotarsa decemlineata

Date published: 2017-01-31