Studies on insect pollinators of cucumber (Cucumis sativus L.)

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dc.contributor.advisorSharma, S.K.
dc.contributor.authorHanh, Tran Thi My
dc.date.accessioned2016-11-19T10:57:11Z
dc.date.available2016-11-19T10:57:11Z
dc.date.issued2008
dc.description.abstractA field study was conducted to investigate the aspects of insect pollinators of cucumber, Cucumis sativus L., at Research Farm of the Department of Plant Pathology, CCS Haryana Agricultural University, Hisar. In total 24 insect species visited cucumber flowers, which constituted 12 Hymenopterans, 6 Lepidopterans, 3 Dipterans, 2 Hemipterans and 1 Coleopteran. Among these, Halictus sp., Ceratina sexmaculata and Apis dorsata were found to be the most abundant. The abundance of C. sexmaculata (2.79 bee/m2/5 min.) was highest followed by Halictus sp. (2.69 bee/m2/5 min.) and A. dorsata (0.78 bee/m2/5 min.). The population irrespective of their species was maximum at 0800-1000 h of the day. Foragers of C. sexmaculata, Halictus sp. and A. dorsata commenced their activity at 0600, 0630 and 0700 h, respectively with peak period at 0800-1000 h and ceased their activity at 1800 h (Halictus sp. and C. sexmaculata) and at 1730 h (A. dorsata). Out of the total foragers of the day, 16.54 per cent were pollen and 83.46 per cent were nectar collectors in case of Halictus sp., 14.62 per cent were pollen and 85.38 per cent were nectar collectors in case of C. sexmaculata, while in case of A. dorsata, 27.87 per cent were the pollen and 72.13 per cent were nectar collectors. Halictus sp. spent maximum time 10.84 seconds/flower. However, A. dorsata spent least time 4.94 seconds/flower but visited maximum (8.63) flowers/minute. Based on loose pollen grains sticking on the body and abundance, pollination index was calculated. Halictus sp. was the most efficient pollinator of C. sativus with pollination index of 126537.60 followed by C. sexmaculata with pollination index 121699.80 and A. dorsata with pollination index 888678.20 under agro-ecological conditions of Hisar (Haryana). Effect of different modes of pollination on yield parameters of cucumber showed that maximum fruit set (76.67%) was observed under Open-pollination + hand-pollination treatment, while it was minimum (16.67%) under Self-pollination treatment. Average fruit length, fruit weight and fruit diameter was observed maximum (13.82 cm, 159.62 g and 3.78 cm, respectively) under Open-pollination + hand-pollination, while these were observed minimum (4.97 cm, 21.10 g and 0.71 cm, respectively) under Self-pollination treatment.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/86443
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomology
dc.subjectDevelopmental stages, Cucumbers, Fruits, Biological phenomena, Hybrids, Grain, Honey, Sexual reproduction, Crops, Plantingen_US
dc.these.typeM.Sc
dc.titleStudies on insect pollinators of cucumber (Cucumis sativus L.)en_US
dc.typeThesisen_US
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