Diversity and foraging dynamics of insect pollinators on rambutan (Nephelium lappacum L.)

K SHIVARAMU, T SAKTHIVEL, P V RAMI REDDY

Abstract


Studies were conducted to document and understand the pollinator diversity and foraging behavior of major insect pollinators on rambutan (Nephelium lappacum L., Family: Sapindaceae) during 2008-10 at Central Horticultural Experiment Station (CHES), Chettalli, Kodagu, Karnataka, India. Stingless bee, Trigona iridipennis and Indian honeybee, Apis cerana were the most dominant foragers with a mean visitation of 3.81 and 3.54/panicle/10 minutes. Other species included A. florea, A. dorsata, an unidentified wasp and calliphorid flies. Peak activity of all foragers was recorded between
10.00-11.00 AM. The extent of fruit set in open pollinated panicles was 29.35fruits/panicle while bagged flowers completely failed to set fruits. The studies established the role of pollinators in rambutan fruit set and hence it is recommended to conserve natural populations or to augment them through placing honeybee colonies to realize maximum fruit set in rambutan.


Keywords


Bees, fruit set, pollination, rambutan

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