Leaf injury ratings for samples taken in June and August in Burlingame and San Mateo. Values are sample means for 5 trees per treatment. Leaf injury was scored from 1 to 5 based on the following scale: 1 =0% leaf area skeletonized, 2 = 25%, 3 = 50%, 4 = 75%, 5 = 100%.
| Leaf injury ratings | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Treatment | Burlingame | San Mateo | ||||||||||||||||||
| Year | 1985 | 1986 | 1987 | 1988 | 1989 | 1985 | 1986 | 1987 | 1988 | 1989 | ||||||||||
| Month | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug | June | Aug |
| 1) 2% carbaryl 1× | 2.0 | 3.2 | 1.4 | 2.4 | 1.3 | 1.6 | 1.2 | 1.8 | 1.4 | 1.9 | 1.8 | 3.3 | 1.4 | 2.0 | 1.2 | 1.3 | 1.2 | 1.4 | 1.2 | 1.7 |
| 2) 1% carbaryl 1× | 2.0 | 2.5 | 1.2 | 1.6 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.2 | 2.4 | 4.5 | 1.5 | 2.4 | 1.5 | 2.1 | 1.6 | 2.1 | 2.0 | 2.7 |
| 3) 2% carbaryl 2× | 1.6 | 2.2 | 1.1 | 1.5 | 1.0 | 1.0 | 1.0 | 1.2 | 1.0 | 1.1 | 2.4 | 3.9 | 1.6 | 2.3 | 1.4 | 1.9 | 1.4 | 2.2 | 1.5 | 2.4 |
| 4) 1 % carbaryl 2× | 1.5 | 2.3 | 1.1 | 1.6 | 1.0 | 1.1 | 1.2 | 1.3 | 1.1 | 1.1 | 2.6 | 4.5 | 1.5 | 2.1 | 1.5 | 2.3 | 1.4 | 1.9 | 1.9 | 2.7 |
| 5) CONTROL | 1.5 | 2.4 | 1.8 | 3.0 | 1.7 | 1.8 | 1.4 | 1.7 | 1.4 | 1.9 | 2.2 | 3.7 | 1.7 | 3.2 | 1.6 | 2.0 | 1.8 | 2.3 | 1.8 | 2.9 |
| Foliar* (fluvalinate applied in June) | 1.3 | 1.5 | 1.1 | 1.2 | 1.1 | 1.2 | 1.3 | 1.3 | ||||||||||||
↵* Foliar applications were not a formal treatment in this study. Values are presented to give a relative injury rating comparison with trunk banding. Applications were made in Woodside, California (Approximately 15 miles SW of San Mateo).