The work is an attempt to define the food demand in the particular larval stages of pine moth Dendrolimus pini L. It has been demonstrated that the amount of autumnal food consumed is about 7-11 times smaller than the spring one. The amount of food consumed in autumn by one caterpillar is on the average 2-3 g, while the spring food consumption ranges between 14 up to as many as 34 g. This work is a continuation of studies aiming at the determination of the amount of food demanded in the particular larval stages by the more important phyllophages.

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