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Cooperative Extension Service |
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Agricultural
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Aquaculture
Dale Bumpers College
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Commercial Horticulture - Fruits and Nuts
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Type - Primocane-fruiting; thorny, erect.
Date of Release - 2009; plant patent #22,449.
Fruit Size - Fruits of Prime-ArkŪ45 are medium-large, averaging 6 g or more in most trials measuring floricane fruits in Arkansas. In trials in Oregon and California, primocane fruits were just over 7 grams and near 9 grams, respectively. In Arkansas, primocane fruits are smaller, usually 4 to 5 grams.
Flavor/Sweetness - Average soluble solids (a measurement of sweetness) of Prime-ArkŪ 45 was near 10%, just under that of Ouachita. In additional measurements in other plantings and years, soluble solids of 10 to 11% have been measured on floricane fruits of Prime-ArkŪ 45. Primocane fruit soluble solids levels have achieved 12%. Overall fruit flavor ratings for Prime-ArkŪ 45 were higher than the previous primocane-fruiting releases, and were near that of Ouachita.
Yield - Fruit yields have been very good in trials of Prime-ArkŪ 45. Most of the yield evaluation in Arkansas has been done on floricanes, and in research trials, floricane yields of Prime-ArkŪ 45 exceeded Prime-JimŪ and were comparable to thornless, floricane-fruiting varieties. For primocane yields, data from Arkansas showed higher yields for Prime-ArkŪ 45 compared to Prime-JimŪ. In observational plots in California and Oregon, primocane yields were very good.
Maturity Date - Floricane first harvest date for Prime-ArkŪ 45 is June 9 in Arkansas, 4 days after Prime-JimŪ and Natchez and 4 days before Ouachita. Primocane first bloom date for Prime-ArkŪ 45 is usually about 2 weeks later than that for Prime-JanŪ and Prime-JimŪ Likewise, primocane fruit ripens 2-3 weeks later for Prime-ArkŪ 45 compared to Prime-JanŪ and Prime-JimŪ, averaging August 8. In California, ripening of primocane fruit was in late August and in Oregon was mid September. This later primocane fruit ripening date should be noted as the harvest date may be an issue in northern areas to complete the fruit ripening period. Likewise this later ripening date could be a major asset for production in areas where later fruiting is desired.
Disease Resistance - No orange rust observed and only slight anthracnose observed. No information available concerning resistance to double blossom/rosette.
Comments - Prime-ArkŪ 45 is primarily intended to provide a high quality berry with excellent postharvest handling to allow production of berries for local and shipping markets in the late summer to fall fruiting season in areas where it is adapted. Summer temperatures above 85oF can reduce fruit set and quality on primocanes. Performance of Prime-ArkŪ 45 in primocane fruiting has exceeded that of Prime-JimŪ and Prime-JanŪ in Arkansas, and may offer enhanced adaptation to higher heat conditions. However, only trial plantings are recommended to determine full adaptation to specific locations.
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