Jeff Franklin is sharing with us the main observations of the season in terms of temperature until July 5 and precipitation until June 30. Always good to remember, this information is coming from Kentville Research Development Centre (KRDC), therefore, difference between locations are possible to be found. Currently, most hybrids are in fruit set and Vitis vinifera varieties, finished bloom last week and it’s already possible to see fruit set in the earliest varieties.
The first table shows the temperature base 5⁰ C and base 10⁰ C from 2018 until 2021 accumulated each year from March 1 until July 5.
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) |
694.0 |
618.9 |
714.8 |
801.6 |
700.9 |
714.2 |
|
Insect development
(Base 10º) |
366.5 |
285.1 |
397.5 |
429.3 |
363.3 |
369.0 |
Figure
1. Degree day accumulations as of July 5, 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, but the
difference between 2021 and 2020 has diminished to 31.8. Based on 10⁰
C, 2021 has 429.3 which is above the average temperature of the last 5 and 10
years with 363.3 and 369.0 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.
The degree accumulation continues as the highest in the last
3 growing seasons, which has impacted positively in grapevine growth, but the
difference between 2021 and 2020 has diminished to 31.8. Based on 10⁰
C, 2021 has 429.3 which is above the average temperature of the last 5 and 10
years with 363.3 and 369.0 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 July 5, 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 we can pay attention to the difference of 2021
compared with the last 3 years, especially larger difference compared to 2019. At
this time, it’s possible to see some similarities with 2012 and it’s
interesting to compare with 2006 where the accumulation is even higher than
2021. Currently bloom is almost done in the vines, but if your vineyard is
still in process, remember that now is a good opportunity for tissue sampling
for nutritional purposes (for more information on how to collect samples please
check Guide
for pests and diseases and tissue sampling information).
In terms of precipitation, the following graph shows the precipitation from January 1st until June 30 from 2012 until 2021 and including the average of the last 10 years.
Figure 3. Cumulative precipitation (mm) as of June
30, 2021. All data are taken from the Kentville weather station, based on a
start date of January 1.
The black line shows the 10 years average and the red line 2021,
which is slightly below and with a similar pattern compared to 2020. It’s
interesting to highlight the season 2012, this season represents the lowest
precipitations values in the graph, meanwhile 2019 has the highest values. Just
to remind, these values are until June 30 and they don’t consider the precipitation
in the first 6 days of July.
Have a nice fruit set!