Abstract
A study was conducted to investigate the diurnal activity patterns of hymenopteran pollinators in culinary melon and the dynamics of hymenopteran pollinators of five selected cucurbitaceous vegetables viz.,culinary melon, bitter gourd, pumpkin and ridge gourd in 34 locations of Kerala from 06:00 h to 18:00 h with a cone type hand net. The study revealed that Apis cerana indica was dominant in culinary melon, pumpkin and ridgegourd and Tetragonula travancorica was dominant in bitter gourd and ash gourd, A. cerana indica, T. travancorica and Halictus sp. recorded highest foraging speed during 10:00 h to 11:00 h; Ceratina hieroglyphica and Lasioglossum sp. recorded highest foraging speed during 09:00-10:00 h; T. travancorica, C. hieroglyphica and Lasioglossum sp. recorded maximum foraging rate during 10:00 h to 11:00 h; A. cerana indica and Halictus sp. recorded highest foraging rate during 11:00-12:00 h and 09:00-10:00 h.
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