Jeff Franklin is sharing with us the main observations of the season until June 28 in terms of temperature. Always good to remember, this information is coming from Kentville Research Development Centre (KRDC), therefore, difference between locations are possible to be found. Currently the earliest hybrids have completed bloom and are even in fruit set, meanwhile some Vitis vinifera varieties, such as Pinot noir and Riesling are still in bloom.
The first table shows the temperature base 5⁰ C and base 10⁰ C from 2018 until 2021 accumulated each year from March 1 until June 28.
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) |
567.2 |
531.6 |
607.6 |
716.0 |
594.8 |
607.0 |
|
Insect development
(Base 10º) |
274.7 |
232.8 |
325.3 |
378.7 |
292.2 |
296.8 |
Figure 1. Degree day accumulations as of June 28, 2021. All data are taken from the Kentville weather station, based on a start date of March 1, and calculated using the single sine method.
The degree accumulation continues as the highest in the last
3 growing seasons, which has impacted positively in grapevine growth, 2021 has
53.4 more GDD than 2020. Based on 10⁰ C, 2021 has 378.7 which is above the
average temperature of the last 5 and 10 years with 292.2 and 296.8
respectively.
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 June 28,
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.
This graph highlights the difference with the last 3 years
and shows differences between 2021 with 2017. Currently we see some
similarities with 2006 growing season in terms of GDD, while 2010 and 2012 have
slight differences with the current season. As mentioned at the beginning,
latest varieties are progressing in bloom and it’s possible to take tissue
samples for nutritional purposes (to obtain more information about tissue
analysis, please refer to Guide
for pests and diseases and tissue sampling information).
The following photos shows Chardonnay and Pinot noir in the last
couple of days.
Figure 3. On the left Chardonnay and on the right Pinot
noir on the weekend.
Figure 4. On the left Riesling and on
the right Chardonnay this Tuesday.