Horticultural Science and Technology 원예과학기술지 ISSN:1226-8763(Print) 2465-8588(Online)

The growth and fruiting characteristics of foreign and domestic varieties of paprika grown during the hot and rainy summer season in Gangwon-do were compared. The rainy season in 2021 lasted 17 days from July 3 to July 19, and 33 days from June 23 to July 25 in 2022. The daily average integrated solar radiation during the rainy season in 2021 was 1788.4 J·cm^-2, though this factor was 1293.1 J·cm^-2 in 2022, which was only 62% of that in 2021. The plant height of the red varieties increased by 10–37% in 2022 compared to 2021, and the leaf area index (LAI) increased by 64%. The growth, width, and weight of fruits were lower in the ‘K-Gloria red’ variety compared to other red varieties. With regard to the yellow and orange varieties, the foreign varieties ‘Volante’ and ‘DSP7054’ showed similar growth levels in both 2022 and 2021. Production during the rainy season was higher in 2021 than in 2022 in varieties other than ‘K-Gloria red’ and ‘DSP7054’. ‘Hera red’ showed the smallest difference between 2021 and 2022 at 0.1 kg·m^-2, and ‘Ensemble’ had the largest difference at 4.8 kg·m^-2. For the yellow and orange series, the differences in production between the domestic varieties during the rainy season were 0.8 kg·m^-2 and 1.5 kg·m^-2 compared to the foreign varieties, and the yields in low-light and high-temperature environments were lower than those of the foreign varieties. ‘ARO-3R’ is the proper variety for short-term cultivation, where the growing season ends before the rainy period, due to its stable growth in the early stages and higher yields prior to the rainy period. For long-term cultivation that passes the summer rainy season, ‘Hera red’, which does not show a large difference in production during the rainy season, and ‘K-Gloria red’, ‘K-Gloria yellow’, and ‘K-Gloria orange’, which have high total production levels, are judged to be helpful for farm management.