Sumarokov O. Beetles as index of renewal of ecological potential in biogeocenoses of Ukrainian steppe at diminishing of the pesticides loadings.

The objects are agrophitocenosises, integrated agrobioocenosises, biogeocenoses of gullies and forest strips, beetles. The aim are to study the nature of beetles's reacting on decreasing of pesticide effect in a steppe zone of Ukraine and to analyze the change of an ecological potential in investigated biogeocenoses on its basis. The methods are edaphic traps, methods of a mathematical analysis. Based on comparisons between observations made in the early period of wide-ranging use of pesticides in 1983-1989, against field studies done in more recent times (1999-2005) seeing substantially (up to 10 to 12 fold) lesser pesticide pressure, the author points out that both the specific diversity and the overall population size have increased, by a factor of 2-3 in the former case. On this basis renewal of ecological potential of biogeocenoses is set.The beetle populations in agrocenoses have grown on average 11 times since pesticide use had been discontinued, and similarly increased the bulk quantity of beetles inhabiting non-cultivated land, i. e., gullies and forest strips. An estimation of feasibility of such pesticide-free practices is presented. Likewise, no serious loss in fertility was seen as a possible consequence of chemical pest control largely lifted in the latter period. Application spheres are the plants protection and the training courses.