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| 1 | msucares.com/newsletters/pests/infobytes | Leaf Blight and River Birch Leaf Shed |
| 2 | maple.dnr.cornell.edu/pubs/diseases/leav | Diseases of Leaves |
| 3 | forums2.gardenweb.com/forums/load/trees/ | Autumn Blaze Maple Leaves Sick |
| 4 | www.weekendgardener.net/organic-pesticid | Homemade Insecticidal Soap Spray |
| 5 | www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7404 | Aphids |
| 6 | www.treeworld.info/f2/ | Tree Forum |
| 7 | hort.ifas.ufl.edu/TREES/comlist.htm | Tree Fact Sheet |
| 8 | www.arboristsite.com/forumdisplay.php?s= | Tree forum |
| 9 | www.entomology.wisc.edu/insectid/index.h | Insect ID |
| 10 | www.gardenline.usask.ca/trees/birch2.htm | Guide to Birch Trees |
| 11 | en.allexperts.com/q/Conifers-713/blue-sp | Spider Mites |
| 12 | www.ubcbotanicalgarden.org/forums/showth | Spider Mites |
| 13 | www.gardenbed.com | allot of info |