Jeff Franklin is sharing this week the main observations of the season in terms of temperature until September 19. Always good to remember, this information is coming from Kentville Research Development Centre (KRDC), therefore, some differences between locations are possible to be found.
The first table shows the temperature base 5⁰ C and base 10⁰ C from 2018 until 2021 accumulated each year from March 1 until September
19. At the end of each section, it’s possible to see the average of the last 5
and 10 years respectively.
|
Category |
2018 |
2019 |
2020 |
2021 |
5 year average |
10 year average |
|
Plant development
(Base 5ºC) |
1879.5 |
1673.1 |
1833.9 |
1904.2 |
1810.1 |
1818.9 |
|
Insect development
(Base 10º) |
1175.6 |
967.6 |
1143.4 |
1153.1 |
1097.3 |
1098.6 |
Figure
1. Degree day accumulations as of September 19. All data are
taken from the Kentville weather station, based on a start date of March 1, and
calculated using the single sine method.
Heat units are still accumulating, with a good amount of
moisture in the soil as well (to see more information about precipitation the
last week, I recommend to watch the updates from Jeff Franklin at the last best
practices session 2021
Weather Summary). 2018 is still slightly higher with 1175.6, while 2020 is
slightly lower with 1143.4, compared to the current accumulation of 2021 with 1153.1.
When the values are compared with the 5 and 10 year average the difference for
both are quite similar, 2021 is ahead with 55.8 units.
In the following
column graph, it’s possible to see the values from 2004 until 2021 and at the
end you can see the average of the last 5 and 10 years respectively.
Figure 2. Degree day accumulations as of September 19, 2021 base 10⁰ C.
All data are taken from the Kentville weather station, based on a start
date of March 1, and calculated using the single sine method.
In this graph, it’s possible to observe the similarities
between 2018, 2020 and 2021, with only a small difference difficult to be
distinguished. Also, the average of the last 5 and 10 years is clearly lower
than the current season. It’s interesting to note that the highest accumulation,
like throughout the whole season, is still in 2012, which has been highlighted
through this growing season.
Finally, harvest started last week with some earliest hybrids,
such as Frontenac and L’Acadie and one of the earliest Vitis vinifera Siegerrebe.
In the following photos it’s possible to observe the beginning of harvest last week.
Figure 3. On the right machine harvest in Frontenac and on the left Siegerrebe.