|
1) Leaf spots - a foliage disease
2) Twig dieback - evidence of cankers and/or stress and decline
3) Mistletoe - a parasitic seed plant
4) Wilt - evidence of moisture deficiency, vascular wilt disease or root rot
5) Fruiting bodies of a canker fungus - signs of canker infections
6)Vascular streaking (internal) - evidence of vascular wilt disease
7) Branch canker at a branch stub
8) Heart rot (internal) and sporophore of a heart rot fungus at a broken branch stub
9)Sporophore of a butt-rot fungus at base of tree
10)Sporophores of a root rot fungus arising from a damaged root
11) Crown gall - a gnarled swelling ("tumor") caused by a bacterium
12) Severed root resulting from construction damage - site of entry for root and butt-rot fungi
13) Nematode damage to small tree roots lesions (upper) and galls (lower)
BACK
Bulletin No. 196-A | Printed October, 1983 | Contact the Forest Health Section |
