Skip to Main Content
Seasonal recovery of chlorotic needles in Scotch pineAuthor(s): Jerry K. Jones; Jerry K. Jones
Source: Res. Pap. NE-184. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 9 p.
Publication Series: Research Paper (RP)
Station: Northeastern Research Station
PDF: Download Publication (321.47 KB)
DescriptionAs part of a research project on Christmas trees being carried on by the USDA Forest Service's Northeastern Forest Experiment Station, the author made a cooperative study of how discolored needles recover their normal color in February and April. Though this does not solve the Christmas tree growers' problem, it does shed some light on the process involved in the discoloration. The study confirmed that the seasonal yellowing of the needles is due primarily to the loss of chlorophyll and, conversely, that a sharp increase in chlorophyll concentration accompanies the return to summer green.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationJones, Jerry K. 1971. Seasonal recovery of chlorotic needles in Scotch pine. Res. Pap. NE-184. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 9 p.
- Outbreak of Zeiraphera rufimitrana on silver fir hitherto unknown in southwest Germany
- Rooting cuttings from douglas-fir, white-fir, and California red fir christmas trees
- Tomicus piniperda (Coleoptera: Scolytidae) Shoot-Feding Characteristics and Overwintering Behavior in Scotch Pine Christmas Trees
XML: View XML