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1975•The Forestry ChronicleOpen access

Cone production of balsam fir damaged by balsam woolly aphid

H. O. Schooley

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Abstract

The effect of balsam woolly aphid, Adelges piceae (Ratz.), damage on cone production by balsam fir, Abies balsamea (L.) Mill., was studied on 49 trees classified into six aphid damage classes. Results showed that there was no appreciable effect until damage exceeded the moderate level. Cone production on trees damaged beyond this level was seriously reduced but, since advanced damage is not reached by all trees simultaneously, it was concluded that adequate seed should be available for stand replacement.

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The effect of balsam woolly aphid, Adelges piceae (Ratz.), damage on cone production by balsam fir, Abies balsamea (L.) Mill., was studied on 49 trees classified into six aphid damage classes. Results showed that there was no appreciable effect until damage exceeded the moderate level. Cone production on trees damaged beyond this level was seriously reduced but, since advanced damage is not reached by all trees simultaneously, it was concluded that adequate seed should be available for stand replacement.

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Available abstract

The effect of balsam woolly aphid, Adelges piceae (Ratz.), damage on cone production by balsam fir, Abies balsamea (L.) Mill., was studied on 49 trees classified into six aphid damage classes. Results showed that there was no appreciable effect until damage exceeded the moderate level. Cone production on trees damaged beyond this level was seriously reduced but, since advanced damage is not reached by all trees simultaneously, it was concluded that adequate seed should be available for stand replacement.

Key concepts: Balsam, Abies balsamea, Aphid, Biology, Forestry, Botany, Horticulture, Geography

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