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The research was carried out in the economic and natural Forest Reserve ‘Yertys Ormany’ in Pavlodarsk Oblast (Kazakhstan) in 2018. In the middle of May, two barrier traps of the ‘Netocia’ type (30, in total) were installed on each research plot damaged by wind, fire and great pine web – spinning pine sawfly – Acantholyda posticalis Mats. Insects were caught every month, from mid−June to mid−August...
Acantholyda posticalis Mats. for over twenty years increases the extent of occurrence and causes defoliation of Scots pine stands. The population size is estimated annually based on the autumn surveys of phytophagous insects, but accuracy of these prognoses is far from satisfactory. The aim of the study was to describe the spatial distribution of pre−imaginal stages of A. posticalis wintering in the...
Jednym z głównych problemów ochrony lasu są powtarzające się gradacje szkodników pierwotnych sosny powodujące uszkodzenia drzewostanów sosnowych, a w skrajnych przypadkach prowadzące do zagrożenia trwałości drzewostanów. Dla praktyki leśnej podstawą podejmowania skutecznych działań ochronnych jest właściwa lokalizacja pierwotnych ognisk gradacyjnych, których prawidłowe wskazanie oraz znajomość mechanizmów...
The study aimed at the estimation of efficacy of the insecticide Mospilan 20 SP (active substance: acetamipryd 20%) used at different doses to reduce the number of great pine web−spinning pine sawfly Acantholyda posticalis Mats. in aerial (doses: 0.2, 0.3 and 0.4 kg/ha) and ground treatments (dose: 0.4 kg/ha). The mortality of A. posticalis larvae reached 57.5−71.6% in aerial treatments. However the...
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