Treatment Factors | First year after treatmentz | Second year after treatmentz | |||
---|---|---|---|---|---|
Percent mortality | Number of sprouts per vine | Length of sprouts (cm) | Percent mortality | ||
Cut-stump treatment type | |||||
Cut only | 44 b | 3.1 a | 55 a | 92 b | |
(11)y | (0.9) | (4) | (4) | ||
Herbicide: low concentration | 82 a | 2.1 ab | 25 b | 99 a | |
(9) | (0.8) | (10) | (1) | ||
Herbicide: high concentration | 91 a | 0.8 b | 28 b | 100 a | |
(4) | (0.4) | (10) | (0) | ||
Time of treatment June | 87 a | 0.4 b | 47 a | 99 a | |
(9)y | (0.2) | (13) | (1) | ||
August | 69 b | 2.5 a | 40 a | 95 a | |
(11) | (0.9) | (10) | (4) | ||
October | 62 b | 3.0 a | 31 a | 98 a | |
(12) | (1.0) | (9) | (2) | ||
Analysis of variance sources of variation and associated P-values | |||||
Degrees of freedom | P-values | ||||
Block | 2 | 0.06 | 0.95 | 0.04 | 0.08 |
Stump treatment (ST) | 2 | <0.01 | 0.11 | 0.02 | 0.08 |
Treatment time (TT) | 2 | 0.07 | 0.04 | 0.13 | 0.44 |
ST•TT | 4 | 0.27 | 0.25 | 0.43 | 0.19 |
Error | 16 |
↵z Means followed by the same letter within Cut-stump treatment type or Time of treatment are not statistically different from each other (Duncan’s, alpha = 0.10).
↵y Standard errors are in parentheses.
Note: Sample size for treatment means was nine for all variables except sprout length, which was seven, six, and four for the cut, low, and high treatments, respectively; and four, six, and seven for the June, August, and October treatments, respectively.