Abstract
Two pollinators, honeybee ＂Apis mellifera＂ and bumblebee ＂Bombus eximius＂ were used to evaluate the pollination effects of large-sized tomatoes in vinyl screen-houses in Taiwan. The flower pollen gathering by ＂B. eximius＂ was observed by using the buzzing behavior, while in honeybee it was normal foraging behavior. Three pollination trials were observed from 25 to 34 days in the cooler seasons during November 2010 and April 2013. Even though temperatures in these facilities reached up to 30°C for a total of 116 hours at midday, both bees successfully pollinated the tomatoes. The results showed that using bumblebees for pollination resulted in a lower malformation rate and a higher number of seeds compared to using honeybees and spraying traditional chemical inducers. The pros and cons of using bumblebees for commercial under the subtropical weather conditions of Taiwan were evaluated and discussed.
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