Weidhaas, J.A.
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Plantation Research: XIV. Studies on the predation of pine needle scale, Phenacaspis pinifoliae (Fitch), by the Coccinellid, Chilocorus stigma (Say). CC-X-119.
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Plantation Research: IX. Chemical Control of Pine Needle Scale, Phenacaspis pinifoliae (Fitch) (Homoptera: Diaspididae), in Christmas Tree Plantations. CC-X-42.
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Cornell Christmas tree pest control recommendations.
DeBoo, R.F.; Weidhaas, J.A.; Sinclair, W.A.
Year: 1964
Catalog ID: 35514
Issued by: Great Lakes Forestry Centre
Availability: PDF (request by e-mail)