Author(s):

Kanika Nagpal, Sunita Yadav and Robin Singh

Abstract: Nectar secretion rhythms and nectar energetics of Indian mustard flowers, variety RH 0749 (recently developed and recommended by CCS HAU, Hisar) were studied during 2015-2016 Rabi Season at Research Area of Oilseeds Section, Department of Genetics and Plant Breeding, and Apiculture Laboratory of the Department of Entomology, CCS Haryana Agricultural University, Hisar, Haryana. The mean dry nectar-sugar (DNS) of 0.055 mg was produced per flower of B. juncea cv. RH-0749. Just opened flowers produced minimum amount of DNS (0.019 mg), while, it was maximum in the flowers after 4 hours of opening (0.099 mg). The energy reward per flower of B. juncea cv. RH-0749 varied from a minimum of 0.323 joules in just opened flower to a maximum of 1.661 joules after 4 hours of opening of flower. On an average, 0.913 joules energy was produced per B. juncea flower.

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