November 24, 2017

End of season day-neutral strawberry yields

One of the objectives of our project was to determine if the use of a low tunnel system with day-neutral strawberries could provide adequate yields.  Traditional June-bearing strawberry varieties in Minnesota have a baseline yield of 5,500 pounds per acre (lb/A).  As shown below, lb/A of each of the six cultivars in the low tunnel and non-low tunnel surpassed this baseline.  Please note that this project had two trial sites; one in Morris (at the West Central Research and Outreach Center, or WCROC), the other in St. Paul.  Preliminary data from USDA low tunnel trials calculated yield for day-neutral varieties varying between 8,600 lb/A to 19,000 lb/A (Lewers, 2012). Yield data from the Morris site for the first year under low tunnels exceeds this benchmark for all cultivars and all systems. 

Pounds per Acre

LT = Low Tunnel; PL = open field on raised bed with plastic; SM = straw mulch, raised beds no plastic

Projected lb/acre of each cultivar and treatment based on 4 replications, with standard error of the means at WCROC

Cultivar

Treatment

lb/A

se

Albion

LT

22365

1019

Albion

PL

16970

623

Evie 2

LT

24001

935

Evie 2

PL

22068

2040

Monterey

LT

23720

641

Monterey

PL

13675

1494

Portola

LT

38292

1776

Portola

PL

24649

138

San Andreas

LT

22195

892

San Andreas

PL

16774

1028

Seascape

LT

28870

1394

Seascape

PL

18874

1173

 

Projected lb/acre of each cultivar and treatment based on 4 replications, with standard error of the means at St. Paul

Cultivar

Treatment

Lb/A

se

Albion

LT

14563

1848.93

Albion

PL

11085

1081.88

Albion

SM

10465

466.35

Evie 2

LT

18245

2659.54

Evie 2

PL

20961

1403.83

Evie 2

SM

12095

1989.17

Monterey

LT

15811

1687.96

Monterey

PL

15795

1238.97

Monterey

SM

7595

2472.63

Portola

LT

15766

3149.73

Portola

PL

18190

1410.30

Portola

SM

13637

2336.33

San Andreas

LT

13065

548.10

San Andreas

PL

11872

1073.21

San Andreas

SM

6477

1608.12

Seascape

LT

15447

1604.44

Seascape

PL

14128

1218.53

Seascape

SM

8706

1563.60

 

Data was also calculated to determine the average number of lbs. per plant over the duration of the harvest season.  The range of commercially acceptable lbs./plant for June-bearing cultivars is 1 to 1 1/2 lbs.  Day-neutral cultivars grown under low tunnels averaged 1.45 lbs. per plant at the Morris site and .90 lbs. at the St. Paul site, while on plastic in the open field 1.02 lbs. per plant were recorded at the Morris site and .89 lbs. at the St. Paul site.

Pounds per Plant

LT = Low Tunnel; PL = open field on raised bed with plastic; SM = straw mulch, raised beds no plastic

Projected lb/plant of each cultivar and treatment based on 4 replications, with standard error of the means at WCROC

Cultivar

Treatment

lb/plant

se

Albion

LT

1.23

0.06

Albion

PL

0.93

0.03

Evie 2

LT

1.32

0.05

Evie 2

PL

1.21

0.11

Monterey

LT

1.30

0.04

Monterey

PL

0.75

0.08

Portola

LT

2.10

0.10

Portola

PL

1.35

0.01

San Andreas

LT

1.22

0.05

San Andreas

PL

0.92

0.06

Seascape

LT

1.58

0.08

Seascape

PL

1.03

0.06

 

Projected lb/plant of each cultivar and treatment based on 4 replications, with standard error of the means at St Paul

Cultivar

Treatment

Lb/plant

se

Albion

LT

0.85

0.11

Albion

PL

0.65

0.06

Albion

SM

0.61

0.03

Evie 2

LT

1.07

0.16

Evie 2

PL

1.23

0.08

Evie 2

SM

0.71

0.12

Monterey

LT

0.93

0.10

Monterey

PL

0.93

0.07

Monterey

SM

0.45

0.15

Portola

LT

0.92

0.18

Portola

PL

1.07

0.08

Portola

SM

0.80

0.14

San Andreas

LT

0.77

0.03

San Andreas

PL

0.70

0.06

San Andreas

SM

0.38

0.09

Seascape

LT

0.91

0.09

Seascape

PL

0.83

0.07

Seascape

SM

0.51

0.09

 

Many thanks to the North American Strawberry Growers Association (NASGA) which helped to sustain this project.