Influence of meteorological factors on the appearance and dynamics of development of cereal leaf beetle

Abstract

The dynamics of development and influence of meteorological conditions on the appearance of cereal leaf beetle (CLB) were investigated during two years, which differed according to temperature regime. Cumulative values of average daily temperature were registered 7, 14, 21 and 28 days before appearance of adult of CLB. The cumulative temperature was the most similar about 14th day (108,40 C 1st-year, and 106,20 C 2nd-year), while identical values of cumulative temperate (102,00 C) was registered on 13 days before stop of hibernation and can use as basic indicator in prognostication of appearance of CLB in spring. The period from beginning of oviposition to the appearance of larva varied between 11 to 19 days during two experimental years and sum temperature was from 203,30 C to 232,60 C. Period of larva development was 17- 19 days and cumulative temperatures in that period were between 258,9 and 283,30 C. The period from cocoon to appearance of first adult of new generation was between 13 and 15 days at the sum temperature from 245,30 C to 247,20 C.