Diversity and abundance of insect pollinators on Allium cepa L
نویسندگان
چکیده
Field experiment was conducted at CCS Haryana Agricultural University, Hisar during 2009-10 to investigate the diversity and abundance of insect pollinators on Allium cepa L. and correlate their incidence in relation to the abiotic environmental factors. Hymenopterans were found to be the most abundant (60%) followed by Lepidoptera, Diptera and Coleoptera. Variation in abundance was recorded over time and space. Irrespective of different day hours, significantly maximum number of Apis dorsata was recorded from onion umbels (5.24 bees/m2/5 min.) followed by A. mellifera (4.05 bees/m2/5 min.), A. cerana (2.93 bees/m2/5 min.) and A. florea (1.79 bees/m2/5 min.) (CD=0.51; p=0.05). Fluctuation in visits of insect pollinators on different days was observed. The visits were low at the time of commencement and cessation of flowering but remained high during mid-flowering period. The study revealed that among abiotic factors, maximum and minimum temperature and relative humidity play a significant role in the foraging population on onion umbels.
منابع مشابه
The Diversity and Abundance of Small Arthropods in Onion, Allium cepa, Seed Crops, and their Potential Role in Pollination
Onion, Allium cepa L. (Asparagales: Amaryllidaceae), crop fields grown for seed production require arthropod pollination for adequate seed yield. Although many arthropod species visit A. cepa flowers, for most there is little information on their role as pollinators. Small flower visiting arthropods (body width < 3 mm) in particular are rarely assessed. A survey of eight flowering commercial A....
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