THE PERFORMANCE OF TEMPERATE ZONE SWEET CORN CULTIVARS IN UGANDA
According to Thompson and Kelly (1957) sweet corn normally behaves as a short-day plant since flower production is hastened by daylengths of less than 12 to 14 hours and is delayed by longer days. However, these authors have also stated that length of day does not have a pronounced influence on growth and does not usually limit the areas in which sweet corn can be grown. In Hawaii, Brewbaker et al (1966) conducted 50 cultivar trials with 71 commercial sweet corn hybrids and cultivars. They concluded that none of the "mainland hybrids" were commercially acceptable for year-round production in the tropics, due to the dwarfing effect of short winter daylengths. Wann and Yarnell (1966) noted that sweet corn cultivars and hybrids differ in the way their growth is affected by daylength; only some cultivars are adapted to both relatively short days and high temperatures.