Mean crown condition rating and associated biotic and abiotic problems for 11 common landscape tree genera assessed at 65 non-residential landscaped sites in the Phoenix metropolitan area. Non-residential survey assessment was during winter 2006–2007 (N = 707).
| Genera taxa | N | Crown rating | Biotic | Primary problem | Abiotic | Primary problem |
|---|---|---|---|---|---|---|
| Acacia | 64 | 3.03z | 38% | Slime flux | 3% | |
| Brachychiton | 53 | 2.42 | 49% | Sooty canker | 49% | Sunscald |
| Eucalyptus | 40 | 2.35 | 35% | Slime flux | 25% | Iron chlorosis |
| Fraxinus | 60 | 2.55 | 38% | Ash decline | 17% | Sunscald |
| Olea | 60 | 2.35 | 30% | Verticillium wilt | 40% | Sunscald |
| Parkinsonia | 63 | 2.79 | 44% | Slime flux | 5% | |
| Pinus | 73 | 2.49 | 34% | Bird damage | 53% | Pine blight |
| Prosopis | 73 | 3.04 | 67% | Slime flux | 0% | |
| Quercus | 51 | 2.16 | 70% | Aphids | 31% | Sunscald |
| Rhus | 49 | 2.39 | 18% | Wood rot | 29% | Dieback |
| Ulmus | 56 | 3.35 | 25% | Sooty canker | 2% |
↵zCrown rating: 1 = Poor; 2 = Fair; 3 = Good; and 4 = Very Good.