Balsam woolly aphids
Whitfield, Fred E.
Balsam woolly aphids - Raleigh 1967 - 1-6 p. - Aphids North Carolina Agricultural Extension Service. Extension Folder No. 258 .
Balsam woolly aphids - Raleigh 1967 - 1-6 p. - Aphids North Carolina Agricultural Extension Service. Extension Folder No. 258 .