LADY BEETLES (COLEOPTERA, COCCINELLIDAE) OF LENINGRAD REGION ORCHARDS (FAUNA, BIOLOGY AND THEIR ROLE IN PEST POPULATION DYNAMICS)

Adalia bipunctata is the most numerous species and plays a very important role in reducing the population of Aphis pomi Deg. and Disaphis dewecta Walk on apple-trees; Hyalopterus pruni Geoffr. and Brachycaudus helichrysi Kalt. on garden plum; Hyperomyzus lactucae L., Cryptomyzus ribis L. and Nasonovia ribisnigri Mos. on red and black currant; Myzus cerasi F. on sour cherry; Aphis idaei Goot on raspberry and Aphis grossulariae Kalt. on gooseberry. C. quatuordecimguttata is a facultative predator of different species of psyllids and plays an important role of reducing the number of Psylla mali Schmdb. Ch. renipustulatus and Ch. bipustulatus consume Lepidosaphes ulmi L. on apple-trees and Chionaspis salicis L. on apple-trees, currant and gooseberry. S. punctillum consumes Metatetranychus ulmi Koch. on apple-trees.