Ralph M. Lindgren

1904 – 1972

• Care needed in thinning pines with heavy fusiform rust infection
• Common Southern forest tree diseases
• Damage from heavy fusiform cankering in '49 can be reduced
• Field observations of needle rusts of spruce in Minnesota
• Fungus control as one means of safeguarding future markets for wood
• The disease problem in relation to tree improvement
• Thinning pines cankered by fusiform rust