Extent of crop depredation in agricultural fields of groundnut, pearl millet, peas, sorghum and sunflower was assessed in Pune, Akola and Amravati, the three productive districts of Maharashtra, India. The study included interviews with the farmers, identification of the bird species responsible for the crop depredation and actual field assessment of damage. The problem of crop depredation is severe for the crops mostly during harvesting season. Most farmers were not satisfied with the conventional bird repelling techniques. A maximum depredation was observed by Sorghum crops by house sparrows Passer domesticus, baya weavers Ploceus philippinus, and rose-ringed parakeets Psittacula krameri, accounting to 52% of the total damage. Blue rock pigeons Columba livia damaged 42% of the peas crop (chick peas and pigeon peas), while house sparrows and baya weaver damaged the groundnut crop by 26% in the sampling plots. House sparrow Passer domesticus and baya weaver Ploceus philippinus damaged the groundnut crop in the sampling plots just after the sowing period. The sustainable solution for reducing crop depredation is a need for the farmers and also such techniques will help avoid direct or indirect effects of use of lethal bird control techniques on bird species. 1. Introduction Wide varieties of arable crops attract granivorous birds which lead to significant damage to the crop yields globally [1, 2]. However, there are few studies pertaining to the awareness of the problem among the farmers and the magnitude of crop damage caused by the birds in India [3]. The problem of crop damage by birds is faced by the farmers and the losses due to crop depredation by birds are significant in terms of the gross crop yield. Birds can inflict damage to the crops and a loss to the farmers in all the stages of crops right from sowing and planting till harvesting. In previous study conducted in India, it was found that the proportion of crop damage to sunflower crop depends on the proportion of foraging activity of the birds [4]. The food of the cropland species is of mostly three types which depend on grains, seeds, fruits, green vegetation of the crop plants and grasses, insects, other arthropods, and rodents found in the soil, crops, and other plants [5]. Most of the activities of birds are either advantageous or disadvantageous to the farmers. Birds create negative impact on most of the agricultural activities and some agricultural activities attract birds as special feeding opportunities [2]. The presence of insectivorous birds in croplands is beneficial to farmers up
References
[1]
J. D. Coleman and E. B. Spurr, “Farmers' perception of bird damage and control in arable crop,” New Zealand Plant Protection, vol. 54, pp. 184–187, 2001.
[2]
S. J. Ormerod, E. J. P. Marshall, G. Kerby, and S. P. Rushton, “Meeting the ecological challenges of agricultural change: editors' introduction,” Journal of Applied Ecology, vol. 40, no. 6, pp. 939–946, 2003.
[3]
M. S. Dhindsa and H. K. Saini, “Agricultural ornithology: an Indian perspective,” Journal of Biosciences, vol. 19, no. 4, pp. 391–402, 1994.
[4]
S. Subramanya, “Non-random foraging in certain bird pests of field crops,” Journal of Biosciences, vol. 19, no. 4, pp. 369–380, 1994.
[5]
R. J. O'Connor and M. Shrubb, Farming and Birds, Cambridge University Press, Cambridge, UK, 1986.
[6]
R. L. Bruggers, E. Rodriguez, and M. E. Zaccagnini, “Planning for bird pest problem resolution: a case study,” International Biodeterioration and Biodegradation, vol. 42, no. 2-3, pp. 173–184, 1998.
[7]
S. P. S. Kushwaha and P. S. Roy, “Geospatial technology for wildlife habitat evaluation,” Tropical Ecology, vol. 43, no. 1, pp. 137–150, 2002.
[8]
S. K. Patyal and R. S. Rana, “Bird damage to Kinnow fruits in 13 Himachal Pradesh and evaluation of management techniques against them,” Pest Management and Economic Zoology, vol. 14, no. 1-2, pp. 157–161, 2006.
[9]
C. Loinger, S. Cohen, N. Dror, and M. J. Berlinger, “Effect of grape cluster rot on wine quality,” The American Journal of Enology and Viticulture, vol. 28, pp. 196–199, 1977.
[10]
C. K. Borad, A. Mukherjee, and B. M. Parasharya, “Damage potential of Indian sarus crane in paddy crop agroecosystem in Kheda district Gujarat, India,” Agriculture, Ecosystems and Environment, vol. 86, no. 2, pp. 211–215, 2001.
[11]
S. Kiruba, B. Mishra, P. Israel, S. Stalin, S. Jeeva, and S. S. M. Das, “Traditional pest management practices in Kanyakumari district, southern peninsular India,” Indian Journal of Traditional Knowledge, vol. 5, pp. 71–74, 2006.
[12]
R. L. Bruggers, J. E. Brooks, R. A. Dolbeer, et al., “esponses of pest birds to reflecting tape in agriculture,” Wildlife Society Bulletin, vol. 14, no. 2, pp. 161–170, 1986.
[13]
R. P. Singh and G. H. Dungan, “How to catch crows,” Allahabad Farmer, vol. 29, pp. 59–67, 1955.
[14]
P. S. Sandhu, M. S. Dhindsa, and H. S. Toor, “Evaluation of methiocarb and thiram as seed treatments for protecting sprouting maize from birds in Punjab (India),” Tropical Pest Management, vol. 33, pp. 370–372, 1987.
[15]
R. K. Bhatnagar, “Significance of birds management and control,” Pesticides, vol. 10, pp. 74–73, 1976.
[16]
L. R. Martin and A. C. Crabb, “Preliminary studies of a bird damage assessment technique for trellised grapes,” in Vertebrate Pest Control and Management Materials, technical publication 2, pp. 205–210, American Society for Testing Materials, Vertebrate Pest Control and Management Materials, 1979.
[17]
J. Tracey and G. Saunders, Bird Damage to the Wine Grape Industry, Report to the Bureau of Rural Sciences, Department of Agriculture, Fisheries and Forestry, Vertebrate Pest Institute, NSW Agriculture, 2003.
[18]
C. M. Somers and R. D. Morris, “Birds and wine grapes: Foraging activity causes small-scale damage patterns in single vineyards,” Journal of Applied Ecology, vol. 39, no. 3, pp. 511–523, 2002.
[19]
S. R. X. Dall, I. C. Cuthill, N. Cook, and M. Morphet, “Learning about food: Starlings, skinner boxes, and earthworms,” Journal of the Experimental Analysis of Behavior, vol. 67, no. 2, pp. 181–192, 1997.
[20]
R. W. DeHaven and R. L. Hothem, “Estimating bird damage from damage incidence in wine grape vineyards,” American Journal of Enology and Viticulture, vol. 32, pp. 1–4, 1981.
