ASD vs Verticillium wilt
ASD vs Verticillium wilt Kelly Ivors, Associate Professor Cal Poly Strawberry Center
Verticillium wilt (Verticillium dahliae) • Broad host range (strawberry very susceptible) • Problem in CA for decades • Often problematic in organic fields w/ veg rotations
Cal Poly Cultivar Trial: 2015
Dominus 40 gal/Ac
Tri-Con 50/50 350 lb/Ac
Pic-Clor 60 42 gal/Ac
Non-fumigated
Cal Poly Cultivar Trial: 2015
San Andreas
Portola
Albion
Monterey
Cal Poly Cultivar Trial: 2015
San Andreas
Portola
Albion
Monterey
Verticillium wilt cultivar trial: 2017 90 different cultivars and elite selections
Verticillium wilt ASD/cover crop trial: 2016 ASD Barley
Wheat
Wheat
Wheat
Barley
Barley
Barley
Barley
Wheat
ASD
Wheat
140 ft
Wheat
ASD
Barley
ASD 35 ft
Barley
Wheat
37.5 ft
Field seeded: 3 Dec 2015; Seeding rate: 100 lb/acre
Wheat
Barley
150 ft
Wheat = hard red Spring ‘Summit 515’ Barley = Stockford
Verticillium wilt ASD/cover crop trial: 2016
Verticillium wilt ASD/cover crop trial: 2016
Verticillium wilt ASD/cover crop trial: 2016
Portola (summer planting)
June 10, 2016
Verticillium wilt ASD/cover crop trial: 2016 Data plot:
•
Percent green foliage
•
Percent plant mortality
•
Verticillium counts
•
Yield
E X T R A B E D S
Verticillium wilt ASD/cover crop trial: 2016
Oct 6, 2016
Verticillium wilt ASD/cover crop trial: 2016
Oct 6, 2016
Dec. 9, 2016
wheat wheat ASD
Barley
Barley + ASD
Wheat
Wheat + ASD
Amount of green foliage (%)
Percent plant death over 10 weeks 80
Wheat 75% 70
Barley 64% 60
50
Wheat ASD 45% 40
Barley ASD 37%
30 Barley Barley ASD
20
Wheat Wheat ASD
10
0 Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
CFUs/gram of soil
Verticillium counts per gram of soil
barley
barley ASD
wheat
wheat ASD
25
Total Marketable Yield (lb) Yield Treatment Mean
Yield (lb) Yield (lbs)
20
15
10
5
0
Wheat wheat
Wheat ASD wheat ASD
Barley Barley
Barley ASD Barley ASD
Summary of ASD/cover crop trial: 2016 •
Combining ASD with a cover crop was more effective at increasing yield and reducing plant death due to Verticillium;
•
The most effective treatment was barley plus ASD; barley plus ASD had the lowest plant death and the highest yield;
•
The most effective cover crop on its own was barley;
•
All treatments reduced Verticillium counts in the soil.
•
Is 37% plant death after 10 weeks acceptable?
Questions? Cal Poly Strawberry field day: July 27 Thanks to Gerald Holmes, Ryan Brantley, Ryan Gilmour Bo Liu, Jeremy Kerfs
Verticillium wilt (Verticillium dahliae) • Broad host range (strawberry very susceptible) • Problem in CA for decades • Often problematic in organic fields w/ veg rotations
Cal Poly Cultivar Trial: 2015
Dominus 40 gal/Ac
Tri-Con 50/50 350 lb/Ac
Pic-Clor 60 42 gal/Ac
Non-fumigated
Cal Poly Cultivar Trial: 2015
San Andreas
Portola
Albion
Monterey
Cal Poly Cultivar Trial: 2015
San Andreas
Portola
Albion
Monterey
Verticillium wilt cultivar trial: 2017 90 different cultivars and elite selections
Verticillium wilt ASD/cover crop trial: 2016 ASD Barley
Wheat
Wheat
Wheat
Barley
Barley
Barley
Barley
Wheat
ASD
Wheat
140 ft
Wheat
ASD
Barley
ASD 35 ft
Barley
Wheat
37.5 ft
Field seeded: 3 Dec 2015; Seeding rate: 100 lb/acre
Wheat
Barley
150 ft
Wheat = hard red Spring ‘Summit 515’ Barley = Stockford
Verticillium wilt ASD/cover crop trial: 2016
Verticillium wilt ASD/cover crop trial: 2016
Verticillium wilt ASD/cover crop trial: 2016
Portola (summer planting)
June 10, 2016
Verticillium wilt ASD/cover crop trial: 2016 Data plot:
•
Percent green foliage
•
Percent plant mortality
•
Verticillium counts
•
Yield
E X T R A B E D S
Verticillium wilt ASD/cover crop trial: 2016
Oct 6, 2016
Verticillium wilt ASD/cover crop trial: 2016
Oct 6, 2016
Dec. 9, 2016
wheat wheat ASD
Barley
Barley + ASD
Wheat
Wheat + ASD
Amount of green foliage (%)
Percent plant death over 10 weeks 80
Wheat 75% 70
Barley 64% 60
50
Wheat ASD 45% 40
Barley ASD 37%
30 Barley Barley ASD
20
Wheat Wheat ASD
10
0 Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
CFUs/gram of soil
Verticillium counts per gram of soil
barley
barley ASD
wheat
wheat ASD
25
Total Marketable Yield (lb) Yield Treatment Mean
Yield (lb) Yield (lbs)
20
15
10
5
0
Wheat wheat
Wheat ASD wheat ASD
Barley Barley
Barley ASD Barley ASD
Summary of ASD/cover crop trial: 2016 •
Combining ASD with a cover crop was more effective at increasing yield and reducing plant death due to Verticillium;
•
The most effective treatment was barley plus ASD; barley plus ASD had the lowest plant death and the highest yield;
•
The most effective cover crop on its own was barley;
•
All treatments reduced Verticillium counts in the soil.
•
Is 37% plant death after 10 weeks acceptable?
Questions? Cal Poly Strawberry field day: July 27 Thanks to Gerald Holmes, Ryan Brantley, Ryan Gilmour Bo Liu, Jeremy Kerfs
