General aspects of influence of meteorological factors on the development of the Colorado beetle, in conditions of Suceava country

Abstract

The study of Colorado potato beetle biology is conducted in close correlation with the meteorological factors from the hibernal period development. The research was conducted in a potato crop in Suceava over four years. For the study on the evolution and hibernation pest were conducted 15 surveys on soil depth of 0-90 cm the autumn and harmful samoles were collected from 5 to 5 cm. The adults density was recorded by executing a ten polls in monoculture determining the load of adults per m². Following the application the 15 ground polls in potato crop to a decreased biological reserve, in the layer of 30-40 cm more severe winter in 2009-2010 and in milder winters 2010-2011 and 2011-2012 the depth of 25-30 cm. Hibernal adult mortality is dependent on both the amount of freezing soil temperatures during and the amount of rainfall recorded in winter.