Symptoms and specification table | Minnesota Stormwater Manual

Symptoms and specification as adopted by the ICP Forest (International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests, 2010)).

Symptoms and specification table
Affected part	Symptom/sign	Code	Symptom/sign specification	Code
Leaves/needles	Partly or totally devoured/missing	01	Holes or partly devoured/missing	31
			Notches (leaf/needle margins affected)	32
			Totally devoured/missing	33
			Skeletonized	34
			Mined	35
			Premature falling	36
	Light green to yellow discoloration	02	Overall	37
	Red to brown discoloration (incl. necrosis)	03	Flecking, spots	38
	Bronzing	04	Marginal	39
	Other color	05	Banding	40
			Interveinal	41
			Tip, apical	42
			Partial	43
			Along veins	44
	Microfilia (small leaves)	08
	Other abnormal size	07
	Deformations	08	Curling	45
			Bending	46
			Rolling	47
			Stalk twisting	48
			Folding	49
			Galls	50
			Wilting	51
			Other deformations	52
	Other symptoms	09
	Signs of insects	10	Black coverage on leaves	53
			Nest	54
			Adults, larvae, nymph, pupae, egg masses	55
	Signs of fungi	11	White coverage on leaves	56
	Signs of fungi	11	Fungal fruiting bodies	57
	Other signs	12
Stem/collar	Wounds (debarking, cracks, etc.)	17	Debarking	58

			Cracks (frost cracks, etc.)	59
			Other wounds	60
	Resin flow (conifers)	18
	Slime flux (broadleaves)	19
	Decay/rot	20
	Deformations	08	Cankers	62
			Tumors	63
			Longitundinal ridges (frost ribs, etc.)	68
			Other deformations	52
	Tilted	21
	Fallen (with roots)	22
	Broken	13
	Necrosis (necrotic parts)	16
	Other symptoms	09
	Signs of insects	10	Boring holes, boring duct	65
			White dots or covers	66
			Adults, larvae, nymph, pupae, egg masses	55
	Signs of fungi	11	Fungal fruiting bodies	57
	Signs of fungi	11	Yellow to orange blisters	67
	Other signs	12
Download an Excel workbook containing tree assessment tables found in the stormwater manual.