Observational study shows injuries lead to bronze birch borer and root rot fungus infestations in birch, indicating environmental conditions play a crucial role.
Investigations of decadence of birch in cut-over lands of northern New England show that injuries induce attacks of the bronze birch borer and the root rot fungus. Decadence appears to be due to abnormal environmental conditions caused by logging operations and drastic opening of thecanopy.
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Spaulding et al. (1931) studied this question.
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