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Fumigation effects of SO2 on pine needle scale infestations on eastern white pine

, : Fumigation effects of SO2 on pine needle scale infestations on eastern white pine. Proceedings of the American Phytopathological Society 1977; 3: 305

Eastern white pine (Pinus strobus) seedlings infested with pine needle scale (Chionaspis pinifoliae) were fumigated with 0.5 p.p.m. SO2 for 6 h/day and 5 days/wk for 10.5 wk, over the second and part of the third generations of the scale. Scale density of the control second generation increased more (3.5X) than the SO2- treated population (1.35X) but length of mature females, and fecundity of second generation females, were similar.

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