Some features of Bioecology of Northern populations of common pear sucker Psylla pyri L.

Abstract

On the territory of the Russian Federation Psylla pyri L. is the most dangerous pest of pear in all the regions of cultivation of this culture. She leaves the wintering areas very early, before Bud break, constantly reproduces and develops before the onset of sustained cold weather. The pest has a high ecological plasticity, easy adapt to different environment conditions in the presence of prey. Biological and ecological features of the development of P. pyri in the Moscow region differ significantly from those given in the literature for the southern zone. According to the results of our research for the development of individual stages of the Northern populations of this phytophage required much less amounts of effective temperatures, especially for the fi rst, spring, generations, babies have greater resistance to frost. Most of the eggs laid in autumn, hatch larvae, which continue feeding on the plants and after leaf fall, depending on weather conditions of the year, until the end of the second decade of December.