CRITERIA FOR EXPEDIENCY OF PROTECTING THE BIRCH STANDS AGAINST PHYLLOPHAGOUS INSECTS IN TRANSURAL REGION

ISSN: 0024-1148 Russian Journal of Forest Science. 2011, No. 2, pp. 13-18

CRITERIA FOR EXPEDIENCY OF PROTECTING THE BIRCH STANDS AGAINST PHYLLOPHAGOUS INSECTS IN TRANSURAL REGION

Ponomarev V.I., Il'inykh A.V., Sokolov S.L.  Botanical Garden, Ural Branch of the Russian Academy of Sciences (BG UD RAS):Bilimbaevskaya st. 32a, Yekaterinburg, 620134, 8-Marta st. 202a, Yekaterinburg, 620144 (jur. addr.) Institute of Animal Systematics and Ecology, Siberian Branch of Russian Academy of Sciences: 630091 Novosibirsk, Frunze st, 11 Ministry of Natural Resources of the Sverdlovsk region., Dep. State Control: 620004 Ekaterinburg, Malyshev st. , 101

E-mail: v_i_ponomarev@mail.ru

Received: 20 february 2009

Based on the data of long-term investigations and results of the authors, the criteria for the expediency of forest protective measures against phyllophagous insects in birch stands of the Transural region and Western Siberia are suggested to reconsider and abandon overall treatments. The main attention should be paid to stands intolerant to defoliation and those adjacent to settlements irrelative of the degree of their tolerance. For this purpose, the construction of maps showing the resistance of stands to zoogenic defoliation is necessary; they could be the base for the decision to conduct protective measures or abandon them. These maps will permit to preserve forest biocenoses and rationally use the funds allocated for their protection.