Evaluation of Pepper Cultivars for Production in Northern Great Plains

Ten commercial cultivars (Ace F1, California Wonder, Carmen F1, Jupiter, King Arthur F1, King Crimson F1, King of the North, Peacework, Ruby King, Yankee Bell) of sweet pepper (Capsicum annum) were evaluated for their performance and fruit quality for local production in North Dakota. Seeds were germinated in cell packs containing Pro-Mix root substrate and seedlings at 6 true-leaf stage were transplanted into the field on 6 June, 2014, about 2 weeks later than the normal planting time. Plants were spaced 1.5 feet (45 cm) apart in rows that were spaced 4 feet apart. Plants were grown in heavy clay soil and overhead irrigated as needed. Mature fruits with full pigmentation were harvested weekly from 13 September for four times. The number and weight of total fruits harvested and percent fruits marketable were obtained at each harvest time. Overall, the average fruit yield was highest in fourth harvest. While Ace F1 had the highest fruit yield during the first week of harvest, King of the North had the highest total average yield (8.5 kg/10 plants). Carmen F1 produced the largest number of fruits (89 fruits/10 plants) followed by Ace F1 at 81 fruits/10 plants. The fruits of Carmen F1 also showed the highest soluble solids content (10.2% Brix reading) compared to other cultivars which showed an average of 8.3%. Fruit qualities measured by sweetness, texture, flavor and appearance were also evaluated for each cultivar. Lycopene and other pigment contents of the fruit were also determined using lyophilized tissues.