Submitted to: National Pepper Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 7/12/2000
Publication Date: N/A
Technical Abstract: At this location, spring and late summer transplant windows exist for bell pepper (Capsicum annuum L.) providing producers the expectation of acceptable yields. If the spring transplant window is missed, yield of bell pepper in Oklahoma will likely be reduced due to flower and fruit abortion initiated by heat induced stress. The bell pepper production window and yield could be increased if germplasm with resistance to heat stress can be identified. This project was undertaken to determine if specific bell pepper cultivars were able to produce yields greater than the current cultivar preferred for this location. Six-week-old greenhouse grown seedlings were transplanted on 4 June 1999. Fruit were harvested from all plants on 30 July and 6 August 1999. Yields from ten cultivars were compared to 'Jupiter', a standard cultivar. Day time ambient air temperatures were above 90 F for a majority of the season after flowering, and night temperatures were in the mid-70's during flowering. Five of the cultivars had better yields, and the remainder either had equal or less yield than 'Jupiter'. The data suggests that some of the cultivars have some resistance to heat induced stress. This quality in the cultivars should allow producers in Oklahoma, and other locations, to extend production through periods of high temperature.