Hort 232 - Optional Reading Suggestions for Selected Topics

Required Readings
Topic
Suggestion
Comment
Gymnosperm families 
Pinales ("conifers") - by Tim Dickinson - from EEB337H1 at Univ. of Toronto. Has a list of features of some conifer families, followed by beautiful photos to illustrate many points.
Genus Abies
Abies -  The Gymnosperm Database
Skip past "Taxonomic Notes" to "Description."
Balsam Woolly Adelgid
Balsam Woolly Adelgid - (pdf) by I.R. Ragenovich and R.G. Mitchell, USDA Forest Service
12 page brochure with detailed descriptions of the insect, hosts, damage, and control.
Genus Picea
Picea -  The Gymnosperm Database Skip past "Taxonomic Notes" to "Description."
Cooley Spruce Gall Aphid
Cooley Spruce Gall Adelgid - University of Massachusetts Extension Fact Sheet
Covers the life cycle of this insect pest.  Includes a few photos.
Genus Pinus
Pinus - The Gymnosperm Database Skip past "Taxonomic Notes" to "Description."
Pinus aristata
Growth characteristics of the ancient bristlecone pines - by Leonard Miller Comments refer to Pinus longaeva and Pinus aristata .  Discusses why they live so long.
Tsuga mertensiana
Tsuga mertensiana - from the Gymnosperm Database  Covers identification, growing conditions, and more.
Conifers
C is for Conifers - from They Might Be Giants
A fun song about conifers.  Mentions some kinds of conifers and uses for them.
Windbreaks
Farmstead Windbreaks: Planning - (pdf) by P. Wray, L. Sternwets, and J. Lenahan, Iowa Cooperative Extension Service
Good summary information on benefits of windbreaks and how to design effective ones.
Windbreaks
Windbreaks - from Penn State Extension
Presents concise information of the effects of height, density, orientation, and length.
Windbreaks
... Leave Some Corn Rows Standing for Winter - from Minnesota Dept. of Transportation
A short news release about the Minnesota DOT paying farmers to leave corn stalks to reduce snow removal costs.
Bulbs
Bulbs & More: Bulb basics - from University of Illinois Extension
Reviews the differences between true bulbs and other storage organs.
Narcissus spp.
Daffodil Divisions & Cultivars - from the American Daffodil Society
Descriptions and good phots to illustrate each dividion.
Invasive plants 
What the Heck is an Invasive Plant? - (pdf) from the National Park Service
From the Weeds Gone Wild web site: a short fact sheet that explains what invasive plants are.
Invasive plants 
Ivy O.U.T. - from Pacific Native Plant Society Extensive information on the problem with Hedera helix in Washington and what to do about it.
Invasive plants 
Invasive and Noxious Weeds - from the USDA and the Natural Recources Conservation Service A nationwide database of invasive plants and noxiuos weeds; information by state or by plant.
Fireblight
Fireblight - (pdf) from Alabama Cooperative Extension
Detail description of the disease.  Lists of susceptible and resistant plants.


Virginia Lohr , Professor, E-mail: lohr@wsu.edu
Department of Horticulture
Washington State University
Pullman, Washington 99164-6414 U.S.A.
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Updated June 29, 2012