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Observational analysis reveals severe infestations of balsam fir by balsam woolly aphid, indicating a lack of effective control measures.
The balsam woolly aphid is well established throughout the range of balsam fir in New England. No control measures applicable to large areas are at present known; and where balsam fir forms an appreciable part of the stand, severe infestations will greatly reduce the value of the crop.
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H. J. MacAloney (1935) studied this question.
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