THE DYNAMICS OF PINE STAND CONDITION AND PHYTOPHAGAN MASS REPRODUCTION OUTBREAKS IN THE NATIONAL NATURAL PARK "BURABAY"
The results of forest pathology monitoring of pine stands ( Pinus sylvestris L.) growing in the National Natural Park “Burabay” and the data on the outbreaks of the most dangerous pests of pines are discussed. It is found that the most dangerous pests of Scotch pine ( Pinus sylvestris L.) in the National Natural Park “Burabay” are pine lappet ( Dendrolimus pini L.) and nun moth ( Lymantria monacha L.). The outbreaks of these insect pests are periodically observed in the territory of the Natural Park and they cause the weakening of the pine stands; that is proved by the stand indices and numbers of pest populations. The stand indices and numbers of pest populations in the foci are indicative of stands’ weakening. The natural control factors of the studied populations are parasitic insects and bacteria. Maintaining pine stands in satisfactory condition may be only achieved with the implementation of forest pathology monitoring and monitoring phytophagan populations. The latter enables planning science based forest protection measures.