The 2021 Vineyard Irrigation Short Course Series is essential for anyone that owns or manages a vineyard with an irrigation system. Students who complete all 3 trainings will receive a certificate.

January 15, 22 and 29 from 1:30 to 4:00 PM

Register here: https://agriliferegister.tamu.edu/Irrigation

These courses will be conducted live using ZOOM. Each student will be required to sign into the course on their own device (no shared enrollment).

3 general CEUs will be delivered (1 at each webinar).

How to Access the Webinar – Instructions to access each webinar will be emailed about 11 a.m. the day of each webinar.  If you do not receive this email, please email Charles Swanson (clswanson@tamu.edu).

January 12th & 19th from 1:00 to 5:00 PM

Register on: https://bit.ly/3o4Drtl

This information is provided as a service by Texas A&M AgriLife Extension Service with partial funding from the High Plains Winegrowers Association. Texas A&M AgriLife Extension Service is not responsible for any damage or loss resulting from the use or misuse of this information.

REAL-TIME MONITORING

Critical temperatures for wine grapes are determined using a method called “differential thermal analysis”.  These data are updated approximately weekly from mid-November through mid-March. Data is collected from approximately 40 buds total (node positions 3 to 8) from at least 10 canes per variety on mature vines grown in vineyards in the Texas High Plains AVA.

LT10 = temperature at which 10% of the primary buds will be killed.

LT50 = temperature at which 50% of the primary buds will be killed.

LT90 = temperature at which 90% of the primary buds will be killed.

MAXT = maximum temperature recorded for the day.

MINT = minimum temperature recorded for the day.

If the temperatures recorded for the day decline below the critical temperature (LT), then bud damage has likely occurred. Please review the Grapevine Cold Hardiness factsheet for information on managing cold-damaged vineyards.

Buds are collected from Texas A&M AgriLife vineyard in Lubbock, Texas.

12/1/2020	LTE10 (°F)	LTE50 (°F)	LTE90 (°F)
Aglianico	19.04	9.41	3.36
Cabernet-Sauvignon	15.49	10.74	7.43
Marsanne	12.81	5.90	3.51
Montepulciano	15.91	8.58	3.18
Roussanne	9.12	4.95	2.43
12/8/2020
Aglianico	13.15	9.37	0.91
Cabernet-Sauvignon	11.50	7.43	2.44
Marsanne	8.35	2.16	-1.77
Montepulciano	9.57	2.59	-0.36
Roussanne	6.28	2.59	0.10
12/15/2020
Aglianico	10.90	4.68	3.24
Cabernet-Sauvignon	9.52	4.82	2.01
Marsanne	6.55	1.99	-3.95
Montepulciano	5.25	2.03	-2.20
Roussanne	4.44	1.42	-1.08
12/22/2020
Aglianico	5.45	2.46	-2.49
Cabernet-Sauvignon	5.63	3.78	0.27
Marsanne	4.73	1.49	-2.13
Montepulciano	4.06	-0.54	-3.55
Roussanne	4.33	1.42	-0.06
1/5/2021
Aglianico	3.34	-0.26	-3.53
Cabernet-Sauvignon	1.98	-1.75	-7.28
Marsanne	2.39	-2.34	-5.44
Montepulciano	1.35	-3.05	-6.38
Roussanne	0.68	-2.94	-8.10
1/19/2021
Aglianico	1.58	-2.79	-7.53
Cabernet-Sauvignon	0.21	-3.75	-8.93
Marsanne	0.41	-3.62	-8.66
Montepulciano	1.17	-2.99	-5.82
Roussanne	0.75	-5.10	-9.62
2/9/2021
Aglianico	2.52	0.73	-0.87
Cabernet-Sauvignon	2.05	-3.12	-8.68
Marsanne	4.37	0.30	-8.34
Montepulciano	2.43	-2.72	-5.66
Roussanne	3.07	-0.54	-6.16
2/23/2021
Aglianico	3.20	3.16	-1.28
Cabernet-Sauvignon	2.46	-0.58	-3.41
Marsanne	4.87	0.34	-4.22
Montepulciano	1.20	-2.38	-6.18
Roussanne	3.94	-0.27	-3.69
3/30/2021
Aglianico	16.97	14.49	12.90
Cabernet-Sauvignon	17.49	16.00	13.08
Marsanne	20.34	17.74	15.35
Montepulciano	17.17	15.19	12.94
Roussanne	20.37	17.74	15.58