Abrol, D.P. and R.C. Sihag, 1997. Pollination Energetic. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 75-98..

Abrol, D.P., R.P. Kapil and R.C. Sihag, 1988. Physiological adaptations of sub-tropical bees in relation to energy intakes. Res. Dev. Rep., 5: 68-70.

Anju, R., K. Beena, S.K. Gahlawat, R.C. Sihag and T.S. Kathpal, 1997. Multiresidue analysis of market honey samples for pesticidal contamination. Pesticide Res. J., 9: 226-230.
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Arora, R., 2000. Effect of commonly used insecticides on acetyl cholinesterase activity of little honeybee, Apis florea F. Ph.D. Thesis, CCS Haryana Agricultural University..

Arya, D.R., R.C. Sihag and P.R. Yadav, 1994. Diversity, abundance and foraging activity of insect pollinators of sunflower (Helianthus annuus L.) at Hisar. Indian Bee J., 56: 172-178.

Arya, D.R., R.C. Sihag and P.R. Yadav, 1994. Role of insect pollinators in seed yield of sunflower (Helianthus annuus L.) Indian Bee. J., 56: 179-182.

Chaudhary, N. and R.C. Sihag, 2003. Diversity, foraging behavior and foraging efficiency of different pollinators visiting onion (Allium cepa L.) blossoms. Korean J. Apic., 18: 103-108.

Chaudhary, N., 2000. Studies on the relative attractiveness of three concurrently flowering crops to the insect pollinators. M.Sc. Thesis, CCS Haryana Agricultural University..

Chaudhary, N., 2004. `Factors influencing inter- and intra-specific preferences of honeybees for three concurrently flowering vegetable/spice crops. Ph.D. Thesis, CCS Haryana Agricultural University..

Chaudhary, N., R.C. Sihag and M.C. Pandey, 2009. Relative abundance, diversity and dominance concentration of two honeybee species on three concurrently flowering crops onion (Allium cepa L.), carrot (Daucus carota L.) and fennel (Foeniculum vulgare L.). Pestology, 7: 9-13.

Dahiya, T., 2005. Survey, isolation and identification of bacterial diseases of fresh water fishes in district Hisar. M.Sc. Thesis, CCS Haryana Agricultural University, Haryana..

Dahiya, T., 2009. Role of probiotics in controlling prominent disease of catfishes. Ph.D. Thesis, CCS Haryana Agricultural University..

Dahiya, T.P. and R.C. Sihag, 2009. Incidence of vibriosis in the Indian magur (Clarias batrachus L.) in saline water ponds of Haryana-A new report from India. The Ecotech., 1: 116-121.

Gahlawat, S.K., B. Chhabra, 2006. A Review on the Honey: A By-Product of Bees (Insecta: Hymenoptera)-Nutritional and Medicinal Aspects. In: Perspectives in Ecology and Reproduction, Gupta, V.K. and A.K. Verma ( Eds.)., Daya Publishing House, Delhi, pp: 102-126..

Gahlawat, S.K., R.K. Gupta, N.K. Yadava, K.L. Jain, R.C. Sihag and V.P. Sabhlok, 2006. Manual of Experimental Ichthyology. Daya Publishing House, Delhi, pages: 290.

Gahlawat, S.K., R.K. Gupta, R.C. Sihag and R.C. Gupta, 2005. Qualitative Behavioral Observations on Rhesus Monkeys, Macaca mulatta (Zimmerman). In: Perspectives in Animal Ecology and Reproduction, Gupta, B.K., A.K. Verma and J.P. Sharma (Eds.)., Vol. 3, Daya Publishing House, New Delhi, pp: 299-303.

Gahlawat, S.K., R.K. Gupta, R.C. Sihag, and R.C. Gupta, 2006. Studies on the Daily Activities of Rhesus Monkeys, Macaca mulatta (Zimmerman) in Saraswati and Veer Sonti Forests of Haryana. In: Perspectives in Animal Ecology and Reproduction, Gupta, V.K. and A.K. Verma (Eds.)., Vol. 3, Daya Publishing House, New Delhi, pp: 265.
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Gahlawat, S.K., S.K. Narwania, R.C. Sihag and Ombir, 2002. Studies on the diversity, abundance, activity duration and foraging behaviour of insect pollinators of cucumber (Cucumis sativus L.) at Hisar. Korean J. Apic., 17: 69-76.

Gahlawat, S.K., S.K.O. Narwania and R.C. Sihag, 2002. Pollination studies on Pracitrullus fistulosus at Hisar, India. Ecoprint, 9: 1-6.

Girdher, R., 2008. Studies on the relative attractiveness of different cultivars of ber (Zizyphus mauritiana Lamk.) to the insect pollinators. M.Sc. Thesis, CCS Haryana Agricultural University..

Gulati, R. and R.C. Sihag, 1996. Medicinal value of honey-a review. Indian Bee. J., 58: 139-143.

Gulati, R., B.R. Gulati and R.C. Sihag, 1996. Antibacterial activity of propolis and honey against Staphylococcus aureus and Escherichia coli. Indian Bee. J., 58: 128-130.

Gupta, M. and R.C. Sihag, 1991. Bee repellents: Ecology and mode of action. Indian Bee. J., 53: 1-8.

Gupta, M. and R.C. Sihag, 1999. Beekeeping and its scope in Haryana. Haryana Farming, 29: 1-36.

Gupta, M. and R.C. Sihag, 1999. Management of honeybees in winter. Haryana Kheti, 32: 11-11.

Gupta, M. and R.C. Sihag, 1999. Pollination benefits from honeybees. Haryana Farm., 29: 16-16.

Gupta, M., 2005. Relative efficacy of different pollen substitute diets on the reproduction and build up of Apis mellifera L. colonies. M.Sc. Thesis, CCS Haryana Agricultural University..

Gupta, M., R.C. Sihag and P.R. Yadav, 1999. How to make beekeeping profitable. Haryana Kheti, 2: 9-24.

Gupta, R.K., R.C. Sihag and D.K. Katyal, 2002. Comparative study of effect of vermicompost formed by different combinations of carbonic waste as brinjal and okra. Proceedings of 11th National Symposium on Environment, June 5-7, 2002, Udaipur, pp: 343-345.

Jain, K.L. R.C. Sihag, B.N. Putatunda and G. Puri, 1989. Management and Conservation of Some Megachilid Bees for Improved Crop Production Efficiciency. Haryana Agril. Univ., Hisar, Pages: 87..

Jakhar, V., 2010. Characterization of pathogenic bacteria of fresh water prawn, Macrobrachium rosenbergii and their control using probiotics and antibiotics. Ph.D. Thesis, CCS Haryana Agricultural University..

Kant, R., 2010. Haematological, biochemical and immunological changes in common carp (Cyprinus carpio L.) following Aeromonas hydrophila infection and herbal treatments. Ph.D. Thesis, CCS Haryana Agricultural University..

Kapil, R.P and R.C. Sihag, 1983. Wax-moth and its control. Indian Bee J., 45: 47-48.

Kapil, R.P. and R.C. Sihag, 1985. Storage and incubation in the management of alfalfa pollinating bee, Megachile flavipes Spinola. J. Apic. Res., 24: 195-198.
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Kapil, R.P. and R.C. Sihag, 1981. Environmental interaction with endocrine functions in relation to social activities of bees. Indian Bee. J., 43: 64-65.

Kaur, G. and R.C. Sihag, 1994. Effect of weather factors on the colony foraging of honeybee ((Apis mellifera L.). Indian Bee. J., 56: 158-162.

Kaur, G. and R.C. Sihag, 1994. Bee flora of India-a review Indian Bee. J., 56: 105-126.

Kaur, G., 1993. Effect of strength, brood condition and colony reserves on colony buildup and foraging activity of Apis mellifera L. M.Sc. Thesis, CCS Haryana Agricultural University..

Kaur, G., 2000. Effect of commonly used insecticides on acetyl cholinesterase activity of Apis florea F. Ph.D. Thesis, CCS Haryana Agricultural University..

Khatkar, S., 1996. Analysis of factors influencing honeybee visits to different cultivars of oilseed crops. Ph.D. Thesis, CCS Haryana Agricultural University..

Kumar, D., 2003. Determining the relative efficacy of vermicompost, FYM and chemical fertilizers on crop yield in some vegetable crops. M.Sc. Thesis, CCS Haryana Agricultural University..

Kumar, S., 1989. Laboratory estimation of toxicity of some commonly used insecticides against honeybees. M.Sc. Thesis, CCS Haryana Agricultural University..

Kumar, S., 2002. Role of earthworms in relation to conversion of soil nutrients in cultivated soils. Ph.D. Thesis, CCS Haryana Agricultural University..

Kumari, B., S. Gahlawat, A. Rathi, R.C. Sihag and T.S. Kathpal, 2000. Dissipation of systemic organophorus insecticides in mustard (Brassica juncea) flowers. J. Apic Res., 39: 179-180.

Mehta, N., 2009. Diversity, visitation frequency and pollination ecology of pollinators of Psidium guajava L. (Guava). Ph.D. Thesis, CCS Haryana Agricultural University..

Mishra, P. and R.C., Sihag, 2001. Role of insect pollination in seed production of radish (Raphanus sativus L.). Seed Res., 29: 231-234.

Mishra, R.C. and R.C. Sihag, 1987. Apicultural Research in India. An AICRP (Honeybees) Publication, Hisar, Pages: 120..

Mishra, S. and R.C. Sihag, 2009. Efficacy of some chemicals as repellents against two honey bee species, (Apis mellifera L. and Apis florea F. in field trials. J. Apic. Sci., 53: 33-66.

Mishra, S. and R.C. Sihag, 2009. Efficacy of some chemicals as repellents against two honey bee species, (Apis mellifera L. and Apis florea F. in semi-field trials. J. Apic. Sci., 53: 53-66.

Monika, 2007. Floral biology, melitophily and pollination ecology of tulsi (Ocimum sanctum L.). M.Sc. Thesis, CCS Haryana Agricultural University..

Narwania, S.K., S.K.O. Gahlawat and R.C. Sihag, 2003. Diversity, Abundance, foraging rates and pollinating efficiency of insects visiting wanga (Cucumis melo ssp. Melo) blossoms at Hisar. Korean J. Apic., 18: 29-36.

Pandey, S., 2004. Relative efficacy of different chemicals as repellents to Apis mellifera L. and Apis florea F. under semi-field and field conditions. Ph.D. Thesis, CCS Haryana Agricultural University..

Priti and R.C. Sihag, 1997. Diversity, visitation frequency, foraging behaviour and pollinating efficiency of insect pollinators visiting cauliflower (Brassica oleracea L. var botrytis cv. Hazipur Local) blossoms. Indian Bee. J., 59: 230-237.

Priti and R.C. Sihag, 1998. Diversity, visitation frequency, foraging behaviour and pollinating efficiency of insect pollinators visiting carrot, (Daucus carota L. var. HC-I) blossoms. Indian Bee. J., 60: 1-8.

Priti and R.C. Sihag, 2000. Diversity, visitation frequency, foraging behaviour and pollinating efficiency of different insect pollinators visiting fennel (Foeniculum vulgare L.) blossoms. Asian Bee. J., 2: 57-64.

Rathi, A. and R.C. Sihag, 1993. Differential Attractiveness of Brassica campestris L. and Cajanus cajan (L) Millsp to Two Honey Bee Species. In: Pollination in Tropics, Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, pp: 113-115.

Rathi, A. and R.C. Sihag, 1993. Effect of the Bee, Chalicodoma lanata F. on Pollination and Seed Yield of Pigeon Pea (Cajanus cajan (L) Millsp). In: Pollination in Tropics Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, pp: 175-177.

Rathi, A. and R.C. Sihag, 1993. Foraging Modes and Foraging Rates of Different Bee Pollinators of Pigeon Pea (Cajanus cajan (L.) Millsp). In: Pollination in Tropics, Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, pp: 93-95.

Rathi, A., 1993. Field study of bee pollinator-pesticide interaction on the pigeon pea (Cajanus cajan (l.) Millsp). Ph.D. Thesis, CCS Haryana Agricultural University..

Saini, R., 2011. Studies on the pollination mechanism in different varieties of amla (Emblica officinalis L.). D. Thesis, CCS Haryana Agricultural University..

Saini, V.K., 2008. Biological observations on a few species of earthworms with special reference to Vermiculture. Ph.D. Thesis, Meerut University, Meerut..

Saini, V.K., R.C. Sihag, R.C. Sharma, S.K. Gahlawat and R.K. Gupta, 2008. Biodegradation of water hyacinth, sugarcane bagasse and rice husk through vermicomposting. Int. J. Environ. Waste Manage., 2: 601-609.

Saini, V.K., R.C. Sihag, R.C. Sharma, S.K. Gahlawat and R.K. Gupta, 2008. Relative efficacy of two methods of vermicomposting for bio-degradation of organic wastes. Int. J. Environ. Waste Manage., 2: 102-110.
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Sharma, P., 2005. Sequencing of Mx-gene in an Indian Major Carp. M.Sc. Thesis, CCS Haryana Agricultural University..

Sharma, P., 2009. Role of probiotics in controlling epizootic ulcerative syndrome disease in carps. Ph.D. Thesis, CCS Haryana Agricultural University..

Sharma, P., S.K. Gahlawat, R.C. Sihag and M. Chauhan, 2007. Induction of Mx gene expression in the Indian major carp, rohu (Labeo rohita Linnaeus). Indian J. Fish., 54: 321-326.

Shivrana, S., 1996. Studies on foraging dynamics of some Apis species. Ph.D. Thesis, CCS Haryana Agricultural University..

Sihag, R.C, 1997. Pollinator-Pesticides Interaction. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 133-142..

Sihag, R.C, S. Kumar and S.K. Gahlawat, 1999. Acute contact toxicity of three synthetic parathyroid insecticides to two honeybee species, (Apis mellifera L. and Apis dorsata F. Korean J. Apic., 14: 67-70.

Sihag, R.C. S.K. Gahlawat, M.K. Dhillon and J. S. Yadav, 2004. Pollination in oilseed crop, taramira (Eruca sativa Mill.): Effects of crop management practices, plant population and number of honeybee colonies on various yield parameters. Asian Bee. J., 6: 52-65.

Sihag, R.C. and A. Rathi, 1994. Diversity, abundance, foraging behaviour and pollinating efficiency of different bees visiting pigeon pea (Cajanus cajan (L.) Millsp.) blossoms. Indian Bee. J., 56: 187-201.

Sihag, R.C. and A. Rathi, 1995. Field Toxicity of Two Insecticides to the Bee Pollinators of Pigeon Pea. In: Pollination Biology: Environmental Factors and Pollination, R.C. Sihag (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 137-145..

Sihag, R.C. and D.P. Abrol, 1986. Correlation and path coefficient analysis of environmental factors influencing flight activity of Apis florea F. J. Apic. Res., 25: 202-208.
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Sihag, R.C. and G. Kaur, 1995. Floral Biology, Melittophily and Pollination Ecology of Sunflower. In: Pollination Biology: Pollination, Plant Reproduction and Crop Seed Production, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 69-89.

Sihag, R.C. and G. Kaur, 1997. Pollination Mechanisms and Syndromes. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 19-37..

Sihag, R.C. and G. Puri, 1989. Wild pollinators of Haryana. Jeewanti, 5-6: 47-50.

Sihag, R.C. and M. Singh, 1991. The honey bee mite, Tropilaelaps clareae Delfinado and Baker. 1. A mite with distinct ectoparasitic characters and mode of life. Indian Bee J., 53: 56-67.

Sihag, R.C. and M. Singh, 1991. The honey bee mite, Tropilaelaps clareae delfinado and baker. 2. Symptoms of infestation in the colonies of honey bee ((Apis mellifera L.). Indian Bee J., 53: 68-72.

Sihag, R.C. and M. Singh, 1999. Why conserve pollinators (Guest editorial)? Bee World, 80: 113-114.

Sihag, R.C. and M. Singh, 1999. Why should the pollinators be conserved? Curr. Sci., 77: 626-627.

Sihag, R.C. and N. Chaudhary, 2003. Role of bee pollinators in increasing seed/fruit yield of vegetable crops. Korean J. Apic., 18: 61-66.

Sihag, R.C. and N. Malik, 1998. Benefits of pollination of crops by honeybees. Vigyan Garima Sindhu, 24: 178-179.

Sihag, R.C. and Priti, 1997. Environmental Factors and Pollination. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 99-131..

Sihag, R.C. and R.C. Mishra, 1995. Crop Pollination and Apis cerana. In: The Asiatic Hive Bee: Apiculture, Biology and Role in Sustainable Development in Tropical and Sub-tropical Asia, Kevan, P.G. (Ed.)., Enviroquest Ltd., Cambridge, Ontario, pp: 135-142..

Sihag, R.C. and R.P. Kapil, 1986. Seasonal Emergence Model of Megachilid Bees. In: Pollination Biology: An Analysis, Kapil, R.P. (Ed.)., Inter-India Publication, New Delhi, India, pp: 131-45.

Sihag, R.C. and S. Khatkar, 1999. Foraging pattern of three honeybee species on eight cultivars of oilseed crops.2. Foraging during the entire blooming period of the crops Int. J. Trop. Agric., 17: 253-261.

Sihag, R.C. and S. Verma, 2001. Acute contact and stomach toxicity of endosulfan and carbaryl insecticides to the little honeybee, Apis florea F. Asian Bee J., 3: 13-19.

Sihag, R.C. and S. Verma, 2002. Acute contact and stomach toxicity of five organophosphate insecticides to the little honeybee, Apis florea F. Asian Bee J., 4: 13-18.

Sihag, R.C. and S. Khatkar, 1999. Diurnal and weekly patterns of nectar sugar concentration in the flowers of eight cultivars of oilseed crops. Ann. Agri-Bio. Res., 4: 251-256.

Sihag, R.C. and S. Khatkar, 1999. Effect of different environmental factors on the foraging activity of three honeybee species visiting eight cultivars of oilseed crops. Ann. Agri-Bio. Res., 4: 257-261.

Sihag, R.C. and S. Khatkar, 1999. Foraging pattern of three honeybee species on eight cultivars of oilseed crops. 1. Diurnal foraging. Int. J. Trop. Agri., 17: 245-252.

Sihag, R.C. and S. Khatkar, 1999. Synchronization of foraging activity of honeybees and flowering/anthesis in oilseed crops. Ann. Agri-Bio. Res., 4: 263-269.

Sihag, R.C. and S. Kumar, 1990. Determining the dose-concentration relationship for bee toxicity experiments. Korean J. Apic., 5: 32-34.

Sihag, R.C. and S. Shivrana, 1997. Foraging Behaviour and Strategies of the Flower Visitors. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 53-73..

Sihag, R.C., 1988. Characterization of the pollinators of cultivated cruciferous and leguminous crops of sub-tropical, Hisar, India. Bee Wld., 69: 153-158.
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Sihag, R.C., 1990. Ecology of European honey bee (Apis mellifera L.) in semi-arid sub-tropical climates. 1 Melliferous flora and over-seasoning of the colonies. Korean J. Apic., 5: 31-43.

Sihag, R.C., 1990. Seasonal management of honeybee (Apis mellifera) colonies in Haryana. Indian Bee J., 52: 51-56.

Sihag, R.C., 1982. Effect of competition with Parkinsonia aculeate L. on pollination and seed production in Medicago sativa L. Indian Bee. J., 44: 89-90.

Sihag, R.C., 1982. Environmental regulation of pollination process in cultivated crops. Indian Bee. J., 44: 42-45.

Sihag, R.C., 1982. Problem of wax-moth (Galleria mellonella L.) infestation on giant honeybee (Apis dorsata Fab.) colonies in Haryana. Indian Bee. J., 44: 107-109.

Sihag, R.C., 1983. Adaptive strategy of bees to overcome environmental hazards. Environ. Ecol., 1: 151-152.

Sihag, R.C., 1983. Honeybees forage on grape (Vitis vinifera L.) during dearth period. Indian Bee. J., 45: 111-112.

Sihag, R.C., 1983. Life cycle pattern, seasonal mortality, problem of parasitization and sex ratio pattern in alfalfa pollinating megachilid bees. Zeit. Angew. Ent. 96: 368-379.
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Sihag, R.C., 1983. Prospects of beekeeping in Haryana. Indian Bee. J., 43: 8-11.

Sihag, R.C., 1984. Differential brood emergence of subtropical magachilid bees. Curr. Sci., 53: 551-552.

Sihag, R.C., 1984. Influence of environmental factors on the pollination activity of bees. Environ. Ecol., 2: 149-152.

Sihag, R.C., 1984. The role of temperature in the evolution of bee plant mutualism. Indian Bee J., 46: 28-32.

Sihag, R.C., 1985. Can alfalfa pollinating sub-tropical megachilid bees overcome Coelioxys parasitization? Curr. Sci., 54: 1250-1251.

Sihag, R.C., 1985. Vittellogenin of alfalfa pollinating bee, Megachile flavipes. Curr. Sci., 54: 92-94.

Sihag, R.C., 1986. Insect pollination increases seed production in cruciferous and umbelliferous crops. J. Apic. Res., 25: 121-126.
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Sihag, R.C., 1986. Reproduction in alfalfa pollinating sub-tropical megachilid bees-6. Formation of corpus luteum and oosorption body. Zool. Anz., 217: 103-115.

Sihag, R.C., 1986. Reproduction in alfalfa pollinating subtropical megachilid bees-1. Functional anatomy and histology of the organs of reproduction. Zool. Anz., 216: 191-203.

Sihag, R.C., 1986. Reproduction in alfalfa pollinating subtropical megachilid bees-2. Reproductive isolating mechanisms. Zool. Anz., 216: 204-217.

Sihag, R.C., 1986. Reproduction in alfalfa pollinating subtropical megachilid bees-3. Mating receptivity as influenced by eco-physiological factors. Zool. Anz., 216: 218-230.

Sihag, R.C., 1986. Reproduction in alfalfa pollinating subtropical megachilid bees-4. Vitellogenesis and oosorption, and factors inducing these processes. Zool. Anz., 216: 231-249.

Sihag, R.C., 1986. Why does the alfalfa pollinating sub-tropical bee, Megachile flavipes make false nesting? Zool. Anz., 217: 228-233.

Sihag, R.C., 1988. Effect of pesticides and bee pollination on seed yield of some crops in India.c J. Apic. Res., 27: 49-54.

Sihag, R.C., 1988. Incidence of Varroa, Euvarroa and Tropilaelaps mites in the colonies of honey bee, (Apis mellifera L. in Haryana. Amer. Bee J., 128: 212-213.

Sihag, R.C., 1990. Behaviour and ecology of the sub-tropical carpenter bee, Xylocopa fenestrata F.1. Adaptive response to high temperatures. Indian Bee. J., 52: 36-37.

Sihag, R.C., 1990. Behaviour and ecology of the sub-tropical carpenter bee. Xylocopa fenestrata F.2 Host plant association. Indian Bee. J., 52: 38-40.

Sihag, R.C., 1990. Megachilid fauna of Haryana re-described. Indian Bee. J., 52: 60-61.

Sihag, R.C., 1991. Behaviour and ecology of the sub-tropical carpenter bee Xylocopa fenestrata F.3. Provisioning and foraging activity patterns. Indian Bee J., 53: 23-29.

Sihag, R.C., 1991. Behaviour and ecology of the sub-tropical carpenter bee Xylocopa fenestrata F.5. Nest recognition and response to nest displacement. Indian Bee J., 53: 81-91.

Sihag, R.C., 1991. Behaviour and ecology of the sub-tropical carpenter bee, Xylocopa fenestrata F.4. Parasites, predators and nest destroyers. Indian Bee J., 53: 30-33.

Sihag, R.C., 1991. Ecology of European honey bee (Apis mellifera L.) in semi-arid sub-tropical climates. 2. Seasonal incidence of diseases, pests, predators and enemies. Korean J. Apic., 6: 16-26.

Sihag, R.C., 1991. Methods of domiciling and bee keeping with alfalfa pollinating sub-tropical megachilid bees. Korean J. Apic., 6: 81-88.

Sihag, R.C., 1991. New interactions of ectoparasitic mites in the colonies of honey bee (Apis mellifera) L. Korean J. Apic., 6: 27-30.

Sihag, R.C., 1991. Some economic estimates of use of pesticides and bee pollination for crop yield. Korean J. Apic., 6: 89-94.

Sihag, R.C., 1992. The yellow banded brown wasp, Vespa orientalis 1. A predator and colony robber of honey bee (Apis mellifera L.) in Haryana (India). Korean J. Apic., 7: 32-34.

Sihag, R.C., 1992. The yellow banded brown wasp, Vespa orientalis 2. Population density, bee capture efficiency and predation rate on honey bee ((Apis mellifera L.). Korean J. Apic., 7: 35-38.

Sihag, R.C., 1992. Utilization of waste stems of sarcandas and castor as nesting tunnels for culturing/keeping wild bee pollinators of some crops. Bioresour. Technol., 42: 159-162.

Sihag, R.C., 1993. Behaviour and ecology of the sub-tropical carpenter bee, Xylocopa fenestrata F.6 Crop hosts and pollination potential. J. Apic. Res., 32: 94-101.

Sihag, R.C., 1993. Behaviour and ecology of the sub-tropical carpenter bee, Xylocopa fenestrata F.7. Nesting preferences and response to nest translocation. J. Apic. Res., 32: 102-108.

Sihag, R.C., 1993. Behaviour and ecology of the sub-tropical carpenter bee, Xylocopa fenestrata F.8. Life cycle, seasonal mortality, parasitization and sex ratio patterns. J. Apic. Res., 32: 109-114.

Sihag, R.C., 1993. Management of Some Sub-Tropical Megachilid Bees for Pollination of Alfalfa (Medicago sativa L.) and Pigeonpea (Cajanus cajan (L.) Millsp). In: Pollination in Tropics, Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, India, pp: 229-232.

Sihag, R.C., 1993. Pollination Problems in Two Oilseed Crops, Toria (Brassica campestris L.) and Sunflower (Helianthus annuus L.) in Southwest Haryana. In: Pollination in Tropics, Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, India pp: 258-261.

Sihag, R.C., 1993. Population Dynamics of Andrenid Pollinators at Sub-Tropical Hisar (India). In: Pollination in Tropics, Veeresh, G.K., R.U. Shankar and K. Ganeshaiah (Eds.)., International Union for the Study of Social Insects, Indian Chapter, Bangalore, pp: 270-273.

Sihag, R.C., 1993. The green bee-eater, Merops orientalis orientalis Latham. 1. Seasonal activity, population density, feeding capacity and bee capture efficiency in the apiary of honey bee, (Apis mellifera L. in Haryana (India). Korean J. Apic, 8: 5-9.
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Sihag, R.C., 1993. The green bee-eater, Merops orientalis orientalis Latham.2.Quantitative losses caused to the colonies of honey bee, (Apis mellifera L. in haryana.The green bee-eater, Merops orientalis orientalis Latham.2.Quantitative losses caused to the colonies of honey bee, (Apis mellifera L. in haryana. Korean J. Apic., 8: 10-13.

Sihag, R.C., 1993. The green bee-eater, Merops orientalis orientalis latham.III.efficiency of some control measures. Korean J. Apic., 8: 14-17.

Sihag, R.C., 1994. Pollination of Asian crops. J. Entomol. Zool., 8: 158-160.

Sihag, R.C., 1995. Differential Attractiveness of Two Cruciferous Vegetable Crops to Honeybees. In: Pollination Biology: Environmental Factors and Pollination, R.C. Sihag (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 41-47.

Sihag, R.C., 1995. Pollination Biology: Environmental Factors and Pollination. Rajendra Scientific Publishers, Hisar, Pages: 195..

Sihag, R.C., 1995. Pollination Biology: Pollination, Plant Reproduction and Crop Seed Production. Rajendra Scientific Publishers, Hisar, Pages: 210..

Sihag, R.C., 1995.. Pesticidal Toxicity to Honeybees and Residues in Honey. Haryana Agril. Univ., Hisar, Pages: 64..

Sihag, R.C., 1997. Determining the Required Number of Pollinators for Crop Pollination. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 187-199..

Sihag, R.C., 1997. Pollination Biology: Basic and Applied Principles. Rajendra Scientific Publishers, Hisar, Pages: 215..

Sihag, R.C., 1997. Utilization of Honeybees as Pollinators of Crops. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 143-152..

Sihag, R.C., 1997. Utilization of Non-Apis bees as pollinators of crops. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 152-169..

Sihag, R.C., 2001. Why should beekeeping be utilized as an input in agriculture? Curr. Sci., 81: 1514-1516.

Sihag, R.C., 2008. A new model on honeybee repellency for their safety against pesticides. Korean J. Apic., 23: 167-170.

Sihag, R.C., S. Kumar and S.K. Gahlawat, 2004. Acute oral toxicity of different insecticides to two honeybee species (Apis mellifera L. and Apis dorsata F. Korean J. Apic., 19: 125-132.

Sihag, R.C., S. Kumar and S.K. Gahlawat, 1998. Acute contact toxicity of endosulfan and carbonyl insecticides to two honeybee species, (Apis mellifera L.) and Apis dorsata F. Korean J. Apic., 13: 55-60.

Sihag, R.C., S. Kumar and S.K. Gahlawat, 1999. Acute contact toxicity of five organophosphate insecticides to two honeybee species, (Apis mellifera L.) and Apis dorsata F. Korean J. Apic., 14: 1-4.

Sihag,R.C., 1997. Determining the Efficiency of Pollinator. In: Pollination Biology: Basic and Applied Principles, Sihag, R.C. (Ed.)., Rajendra Scientific Publishers, Hisar, pp: 171-186..

Sunita, 2000. Estimation of toxicity of some insecticides to little honeybee, Apis florea F. M.Sc. Thesis, CCS Haryana Agricultural University..

Wadhwa, N., 2007. Floral biology, melittophily and pollination ecology of sarpagandha (Ravolfia serpentina L.).M.Sc. Thesis, M.Sc. Thesis, CCS Haryana Agricultural University..

Wadhwa, N., 2011. Studies on the pollination mechanism in different varieties of plum (Prunus domestica L.). Ph.D. Thesis, CCS Haryana Agricultural University..