Bobrov I. Spread and injuriousness of pine bark bug in the stands of Novgorod-Siverske Polissya

Object - spread, development and harmfulness of pine bark bug; the aim - reasoning the measures of prevention of the spread of pine bark bug foci and forest protection on the basis of revealing the characteristics of its spread, population dynamics and harmfulness in the stands of Novgorod-Siverske Pollissya; methods - entomological, silvicultural, forest inventory, biometrics; novelty - the dependence of spread, population dynamics and harmfulness of pine bark bug depending on forest site conditions, age, tree species composition; the features of pine bark bug seasonal development in the region are studied; its harmfulness is evaluated in the complex foci; influence on sanitary condition, mortality and increment of stands. timber quality, length and weight of needles, intensity of resin flow are determined; high efficiency of ash, ammonium nitrate and birch litter use against pine bark bug is shown; results - numerical score was suggested for prediction of pine bark bug spread; optimal timing of cleaning in pine plantations in the foci of pine bark bug as well as application of insecticides and fungal preparation Boverin; sphere of application - forestry.