1- Ahn, Y. J., Kim, K.J., and Yoo, J.K. 2001. Toxicity of the herbicide glufosinate- ammonium to predatory insects and mites of Tetranychus urticae (Acari: Tetranychidae) under laboratory conditions. Journal of Economic Entomology 94: 157-161.
2- Altieri, MA. 1999. The ecological role of biodiversity in agroecosystems. Agriculture, Ecosystems and Environment 74: 19-31.
3- Bach, C.E. 1980. Effects of plant density and diversity on the population dynamicsof a special herbivore, the striped cucumber beetle, Acalymma vittata (Fab.). Ecology 61: 1515-1530.
4- Baqestani, M.A., and Zand, S. 2003. Weeds in wheat fields: challenges and perspective. Journal of Nehadeh (In Persian), 18: 11-17. (In Persian).
5- Blackman, R.L., and Eastop, V.F. 2000. Aphids on the World’s crops: an identification and information guide, 2nd ed. John Wiley and Sons. 466 pp.
6- Charlotte, S. 2007. Measurment of Biodiversity. Available at Web site: http://www.eccora.eu/coastalwiki/measurment of biodiversity. verified 15 March 2007.
7- Cowgil, S.E., Wratten, S.D., Sotherton, N.W. 1993a. The selective use of floral resources by the hover fly Episyrphus balteatus (Diptera: Syrphidae) on farmland. Annals of Applied Biology, 122: 223-231.
8- Cowgil, S.E., Wratten, S.D., and Sotherton, N.W. 1993b. The effect of weeds on the numbers of hoverfly (Diptera: Syrphidae) adults and the distribution and composition of their eggs in winter wheat. Annals of applied biology 123: 499-515.
9- Cox, C. 1999. 2-4-D: Ecological Effects. Journal of Pesticide Reform 9(3): 14-19.
10- Freeman, K., and Boutin, C. 1995. Impacts of agricultural herbicide use on terrestrial wildlife in temperate landscape: A review with special reference to North America. Agriculture, Ecosystem and Environment, 52: 67-91.
11- Hodjat, S.H., and Azmayeshfard, P. 1987. Aphids on grasses in Iran. Iranian Journal of Applied Entomology and Phytopathology 54: 83-109.
12- Landis, D.A., Wratten, S.D., and Gurr, G.M. 2000. Habitat management to conserve natural enemies of arthropod pests in agriculture. Annual Review of Entomology 45: 175-201.
13- Marshall, E.J.P., Brown, V.K., Boatman, N.D., Lutman, P.J.W., Square, G.R., and Ward, L.K. 2003. The role of weeds in supporting biological diversity within crop fields. European Weed Research Society, Weed Research 43: 77-89.
14- Norris, R.F., and Kogan, M. 2005. Ecology of interactions between weeds and arthropods. Annual Review of Entomology 50: 479–503.
15- Perfecto, I. 1992. Vegetation diversity, ants and herbivorous pests in a Neotropical agroecosystem. Environmental Entomology 21: 61-67.
16- Rashed Mohassel, M.H., Nadjafi, H., and Akbarzadeh, M. 2002. Weed Biology and Control. Ferdowsi University Press, Mashhad, Iran. (In Persian).
17- Sadeghi, H. 2007. Response of aphidophagous hover flies (Diptera, Syrphidae) to herbicide in winter wheat. Volucella 8: 125-134.
18- SAS Institute. 2002. Version 9 for Windows, Cary, NC. SAS Institute. Inc.
19- Tonhasca, J., and Byrne, D.A. 1994. The effects of crop diversification on herbivorous insects: a meta-analysis approach. Ecological Entomology 19: 239-244.