Biological studies of stingless bee, Trigona laeviceps Smith and its role in pollination of durian, Durio zibethinus L. cultivar Chanee
1992
Somnuk Boongird
Duration of immature development of worker of Trigona laeviceps took about 40 days. The emergence of adult worker needed help from house bees to cut off cocoon. Nest architecture and oviposition process of T. laeviceps have been investigated. The correlation between nest temperature and ambient temperature is highly positive by r = 0.85. The foraging behavior of T. laeviceps during durian blossom was found that T. laeviceps visited durian flowers for collecting pollen about 80.00 +- 2.49 percent of total visit, compared with Apis mellifera which collected durian pollen 20.02 +- 8.50 percent of total 09.00 a.m., then declined in number until 02.00 p.m. The efficient insect pollinators of durian are Apis dorsata, T.fimbriata, T.collina, T. laeviceps, A. mellifera and A. cerana. According to the floral syndromes of durian showing a tendency of bat pollination, but any bat visit to the durian flowers could not be observed in this study. The floral biology of durian cultivar Chanee has been investigated on phenology, stigma receptivity, pollen viability, pollen character, nectar concentration and type of pollination which was compared with hand cross pollination at night and day time. The total number of the natural fruit set of each durian tree was simulated by y = 1.4124 + 0.0014 x when y = total number of fruit set of each tree and x = total number of flower produced from each tree. The toxicity of insecticide sprayed over durian flowers during flowering period was also studied.
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Эту запись предоставил Kasetsart University