February 25, 2018

Strawberry Cultivar Trials Overview – 1982-2013

J. Luby, E. Hoover – Department of Horticultural Science, St. Paul

T. Nennich, K. Mann, P. Johnson – North Central Research and Outreach Center, Grand Rapids

S. Poppe – West Central Research and Outreach Center, Morris

R. Faber – Sand Plains Research Farm, Becker


Production performance and disease resistance traits of strawberry cultivars are presented based on trials were planted in 2012 at the University of Minnesota’s North Central Research and Outreach Center (NCROC) in Grand Rapids (sandy loam soil) and West Central Research and Outreach Center (WCROC) in Morris (loam soil).

Plots are 15 feet long and replicated three times for each cultivar at WCROC and HRC and mulched with straw over the winter. At NCROC, 3 replications of paired plots are planted for each cultivar and one of each pair is left unmulched over the winter to assess winter injury through stand loss. All plots are mulched for the harvest season. The trials are irrigated as needed and fertilized depending on the soil type and plant health. They are sprayed with insecticides to control tarnished plant bug and may be sprayed with fungicides to control Botrytis if needed.

Plots are harvested every 2 to 4 days and the yield and average berry weight are recorded at each harvest and summarized for the season. The relative season, or earliness, of a cultivar is estimated by the proportion of the total yield for that cultivar that is harvested in the first 1 to 4 harvests (first week to 10 days) of the season depending on length of season.

Stand of each plot is recorded each fall and then again in the following spring to provide an estimate of winter injury and also to provide information on plant density that can be related to yield.

Vigor of plants in each plot is rated on a scale from 0 = dead to 9 = very vigorous. Loss of vigor can be related to winter injury or damage from root rot diseases.

Disease severity is rated on a scale from 9 = no disease to 1 = severe disease when natural epidemics of root rots or leaf diseases occur.

Establishment was very good in 2012. The winter of 2012-13 saw heavy snow cover that persisted late into the spring, very cold winter temperatures, and a very cold, wet spring at Grand Rapids which greatly reduced stands and yield in 2013. Surprisingly, stands in the mulched plots suffered more than in the unmulched plots. We assume this may have been due to longer ice coverage of mulched plots with the large snowcover at this site. Stands at Morris were also generally reduced over winter, but not as severely as at Grand Rapids.

Summary of  Relative Characteristics of June-bearing Strawberry Cultivars Observed in Minnesota Trials from 1982-2013

Early season 

Cultivar

Hardiness

Season

Fruit size

Texture

Flavor

Veestar

Very good

Early

Small

Soft

Excellent

Annapolis

Very good

Early

Med

Firm

Very good

Itasca

Very good

Early

Med

Mod soft

Good

Earliglow

Fair

Early

Small

Mod firm

Excellent

Evangeline

Good

Mid

Med

Mod firm

Very good

Sable

Very good

Early

Small-med

Soft

Excellent

Honeoye

Excellent

Early

Med

Soft

Good

Wendy

Good

Early

Med

Mod firm

Very good

Northeaster

Fair

Early

Small-med

Mod firm

Excellent

Midseason

Cultivar

Hardiness

Season

Fruit size

Texture

Flavor

Glooscap

Excellent

Mid

Med

Mod Firm

Good

Mesabi

Excellent

Mid

Med-large

Mod Firm

Very good

Cavendish

Very good

Mid

Large

Firm

Very good

Darselect

Good

Mid

Large

Mod firm

Very good

Kent

Very good

Mid

Med

Mod firm

Good

Brunswick

Good

Mid

Med-large

Firm

Very good

Mira

Fair

Mid

Med-large

Firm

Fair

Cabot

Fair

Mid-Late

Very large

Very firm

Fair

L’Amour

Good

Mid

Med-large

Firm

Very good

Redchief

Fair

Mid

Med

Firm

Good

Seneca

Good

Mid

Med

Firm

Good

Delmarvel

Fair

Mid

Med

Firm

Very good

Allstar

Fair

Mid

Med

Firm

Very good

Primetime

Fair

Mid

Med

Firm

Very good

Jewel

Fair

Mid-late

Large

Very firm

Excellent

Late season 

Cultivar

Hardiness

Season

Fruit size

Texture

Flavor

Winona

Very good

Late

Large

Mod Firm

Good

Clancy

Fair

Late

Med-Large

Very firm

Good

Bounty

Very good

Late

Med

Mod firm

Very good

Sparkle

Good

Late

Med

Mod firm

Very good

Latestar

Fair

Late

Med

Firm

Very good

Lateglow

Fair

Late

Med

Mod firm

Very good

Ovation

Fair

Late

Med-Large

Mod firm

Good

Valley Sunset

Good

Late

Large

Mod firm

Excellent