Treatmentz | Application rate (product/L of water) | Mean % leaf damagey | |
---|---|---|---|
31 July | 14 August | ||
Surround® | 30 g/L (0.25 lb/gal | 1.40 cd | 0.92 cd |
Sevin® | 0.3 g/L (0.04 oz/gal) | 1.25 c | 0.67 |
Neem Gold® | 8.3 mL/L (0.83%) | 2.40 bc | 1.40 cd |
Bayleton | 0.9 g/L (0.12 oz/gal) | 2.40 bc | 4.17 abc |
UltraFine® Oil | 14.0 mL/L (1.4%) | 2.58 bc | 3.58 abc |
Kaligreen | 6.6 g/L (0.05lb/gal) | 2.67 bc | 3.58 abc |
M-Pede® | 8.3 mL/L (0.83%) | 3.58 bc | 3.33 bcd |
Equate® | 18.3 mL/L (1.8%) | 3.67 b | 3.33 abc |
Triact 70® | 8.3 mL/L (0.83%) | 4.75 b | 3.33 abc |
Ajax® | 18.3 mL/L (1.8%) | 3.33 bc | 8.42 a |
Armicarb® | 6.6 g/L (0.05 lb/gal) | 7.67 a | 5.92 ab |
Control | — | 5.50 ab | 5.17ab |
LSD(0.05) | 2.87 | 2.41 |
↵zInsecticide Sevin® (carbaryl) was added in a tank mix with fungicide Compass® (trifloxystrobin) starting in mid-June when Japanese beetles were detected in insect traps. All other treatments were initiated in early May for disease control.
↵yMean values followed by common letter within a column are not significantly different according to analysis of variance (Proc GLM) least significant differences on square root transformed data (λ + 0.5) (SAS Institute 1990). Dates in which statistical differences were not detected are not shown.
LSD = least significant difference.