A preliminary crown biomass table for even-aged Picea abies stands in Switzerland
Usoltsev, V.A, Hoffmann, C.W. (Russian Academy of Sciences, Forest Institute, Bilimbayevskaya 32a, Ekaterinburg 620134 (Russian Federation))
Published in Forestry (Oxford) (United Kingdom) (1997)
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Published in Forestry (Oxford) (United Kingdom) (1997)
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Host specificity of biotypes of Dactylopius opuntiae (Cockerell) (Hemiptera: Dactylopiidae): prospects for biological control of Opuntia stricta (Haworth) Haworth (Cactaceae) in Africa
Githure, C.W, Zimmermann, H.G. (Agricultural Research Council, Pretoria (South Africa). Plant Protection Research Inst.), Hoffmann, J.H
Published in African entomology (01.03.1999)
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Published in African entomology (01.03.1999)
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