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Forestry Compendium

Comprehensive, encyclopedic resource for information on forestry

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AbstractFull Text

Investigation have been carried out in mature oak stands in Vidin and Bourgas State Forestries. The results show that when gypsy moth's density is up to 25-30 egg-pods per 100 trees, the little insectivorous birds are, when at increased densities, a main factor of regulating the pest's frequence....

Penev, D.; Ovcharov, D.
Forest Research Institute, Sofia, Bulgaria
Proceedings of a jubilee symposium marking 125 years of the Bulgarian Academy of Sciences and 65 years of the Forest Research Institute, Sofia, Bulgaria, 22-23 September 1994, 1995, pp 153-159