Institut za šumarstvo Minić, Danica GRADACIJA MRAZOVACA (LEPIDOPTERA, GEOMETRIDAE) NA PODRUČJU CERA gradacija, mali mrazovac, prag štetnosti, golobrst outbreak, small geometrid moth, damage threshold, defoliation https://unilib.phaidrabg.rs/o:6701 ISSN: 0351-9147 info:eu-repo/semantics/article srp 1996 Gradacija mrazovaca (Geometridae) na području Cera trajala je od 1990-1994. godine. Izrazito dominantan u periodu kulminacije gradacije, koja je trajala dve godine, bio je mali mrazovac Operophtera brumata L. u 1992. godini. U 1992. godini prosečan broj gusenica na 1000 listova na celom ispitivanom području iznosio je 245,8 a delimičan i totalan golobrst utvrđeni su na 394,25 ha. U 1993. godini prosečan broj gusenica na 1000 listova iznosio je 358,4 a delimičan i totalan golobrst su konstatovani na 719,76 ha. Winter moth (Geometridae) outbreak in the region of Mt. Cer lasted from 1990 to 1994. In the period of outbreak culmination which lasted for two years, small geometrid moth Operophtera brumata L. was expressively dominant in 1992. In 1992, average number of caterpillars per 1,000 leaves throught out the analyzed region amounted to 245.8, and partial and total defoliations were observed over 394.25 ha. In 1993, average number of caterpillars per 1,000 leaves amounted to 358.4, and partial and total defoliations were observed over 719.76 ha. All rights reserved Zbornik radova Instituta za šumarstvo startpage: 108 endpage: 115 application/pdf 3352310 bytes