Table 1.
Maximum, minimum, and mean daily temperatures for the warmest (July or August) and coldest (December or January) months at the site during the course of the microplot experiment.
| Month, year | Maximum | Minimum | Mean |
|---|---|---|---|
| July, 2007 | 30.5 | 16.5 | 23.5 |
| January, 2008 | 0.3 | −6.6 | −3.2 |
| July, 2008 | 29.2 | 14.6 | 21.9 |
| December, 2008 | −2.2 | −8.5 | −5.4 |
| July, 2009 | 31.1 | 15.5 | 23.3 |
| December, 2009 | −1.3 | −6.5 | −3.9 |
| July, 2010 | 29.5 | 14.3 | 21.9 |
| January, 2011 | 2.0 | −4.3 | −1.2 |
| August, 2011 | 29.4 | 14.1 | 21.8 |
Table 2.
Effects of rootstock on population densities of Mesocriconema xenoplax (Mx) in inoculated microplots and vine growth parameters for ‘Merlot’ grapevines grown in microplots with (+Mx) or without (−Mx) M. xenoplax.
| Mx population density | 2011 trunk cross-sectional area (mm2) | 2008-2011 cumulative pruning weights (g dry weight/vine) | Total root biomass (g/kg dry soil) | Fine root biomass (g/kg dry soil) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Rootstock | Mx/L soil | −Mx | +Mx | −Mx | +Mx | −Mx | +Mx | −Mx | +Mx |
| 44-53 | 3,559 | 457 | 445 | 135 | 115 | 1.47 | 1.18 | 1.02 | 0.91 |
| Riparia Gloire | 4,968 | 340 | 343 | 164 | 153 | 1.52 | 1.31 | 1.21 | 1.09 |
| 3309C | 3,985 | 559* | 310 | 149 | 153 | 1.44 | 1.73 | 1.11 | 1.34 |
| Self-rooted | 2,172 | 269** | 167 | 116*** | 49 | 1.05* | 0.66 | 0.66*** | 0.38 |
| Average | 406* | 316 | 141*** | 118 | 1.37** | 1.22 | 1.00* | 0.93 | |