In collaboration with Iranian Phytopathological Society

Document Type : Pest Management

Authors

Abstract

In this study, spatial distribution pattern of alfalfa leaf and root weevils was determined using geostatistics. This study was conducted in four alfalfa fields (0.4, 0.5, 3.1 and 7.3 ha) located in the experimental farm of Faculty of Agriculture University of Tabriz, Tabriz, Iran. The 0.4 and 0.5 ha fields were divided into 10 × 10 m grids and 3.1 and 7.3 ha fields were divided into 30 × 30 m grids. Weekly samplings were started at the end of winter and continued until the last clipping of the yield. Depending on the height of alfalfa plants, a 1 × 1 m quadrat and a standard sweep net were used for weevils sampling. One sample was taken from each grid. Spatial analyses of data were conducted using GS + 5.1.1. Degree of dependence (DD) was used for determining spatial dependency of data and spatial distribution pattern of alfalfa weevils. Distribution maps were produced using ArcGIS 9.3. DD values were > 26% for 97 out of 116 data series, indicated that weevils are aggregately distributed in the alfalfa fields and has medium to strong spatial dependency. These results provide useful information about ecology of leaf and root weevils in the alfalfa fields and can be used in site-specific management programs.

Keywords

BEHDAD, E. 2005.Introductory entomology and important plant pests in Iran. 823 pp. Yadbood Publication. Isfahan, Iran (In Persian).
BLOM, P. E. and FLEISCHER, S. J. 2001. Dynamics in the spatial structure of Leptinotarsa decemlineata (Coleoptera: Chrysomelidae). Environmental Entomology, 30: 350-364.
BRESSAN, A., MORAL GARCIA, F. J., SEMETEY, O., and BOUBON-PADIEU, E. 2010. Spatio–temporal pattern of Pentastiridius leporinus migration in an ephemeral cropping system. Agricultural and Forest Entomology, 12: 59-68
CASTRIGNANO, A., BOCCACCIO, L., COHEN, Y., NESTEL, D., KOUNATIDIS, I., PAPADOPOULOS, N. T., DE BENEDETTO, D. and MAVRAGANI-TSIPIDOU, P. 2012. Spatio-temporal population dynamics and area-wide delineation of Bactrocera oleae monitoring zones using multi-variate geostatistics. Precision Agriculture, 13: 421-441.
CLARK, I. 2001. Practical Geostatistics. On-line book: ISBN: 0-97033-17-03. WWW. Uni-tuebingen.de /egpinfo/Pedometrie/PracticalGeostatistics1979. pdf.
GREGO, C. R., VIEIRA, S. R., and LOURENCAO, A. L. 2006. Spatial distribution of Pseudaletia sequax Franclemont in triticale under no-till management. Scientific Agriculture, 63: 321-327.
HADDADI, A., IRANIPOUR, S., KAZEMI, M. H. and ALIZADEH, A. 2014. Spatial distribution of alfalfa leaf weevil, Hypera postica (Col.: Curculionidae) in Urmia. Field Crop Entomology, (In Press). (in Persian with English summary).
HASSANI-PAK, A. A. 2007. Geostatistics. 314pp. University of Tehran Press. Tehran, Iran. (In Persian).
JOHNSTON, K., J. M. VER HOEF, K. KRIVORUCHKO, and N. LUCAS. 2003. Using ArcGIS Geostatistical Analyst. ESRI Press, Redlands, CA.
KARIMI, H. 1990. Alfalfa. 371 pp. Iran University Press. Tehran, Iran. (In Persian).
KARIMZADEH, R., HEJAZI, M. J., HELALI, H., IRANIPOUR, S. and MOHAMMADI, S. A. 2011.Analysis of the spatio-temporal distribution of Eurygaster integriceps (Hemiptera: Scutelleridae) by using spatial analysis by distance indices and geostatistics. Environmental Entomology, 40 (5): 1253-1265.
KHANJANI, M. 2005. Field crop pests (insects and mites) in Iran. 719 pp. Abu-Ali Sina University Press, Hamadan, Iran. (In Persian).
LIEBHOLD, A. M., ROSSI, R. E. and KEMP, W. P. 1993. Geostatistics and geographic information systems in applied insect ecology. Annual Review of Entomology, 38: 303-327.
MAJIDI, M., ALICHI, M. and EHTESHAMI, F. 2010. Spatial distribution of alfalfa root weevil (Sitona humeralis) in alfalfa farms of Badjgah region. Proceedings of the 19th Iranian Plant Protection Congress. Volume I, Pests. 31 July - 3 August 2010, Iranian Research Institute of Plant Protection, Tehran Iran.
McBRATNEY, A. B., WEBSTER, R. and BURGESS T. M. 1981. The design of optimal sampling schemes for local estimation and mapping of regionalized variables-I: theory and method. Computer and Geoscience, 7: 331-334.
MITSUI, H., TAKAHASHI, K. H. and KIMURA, M. T. 2006. Spatial distributions and clutch sizes of Drosophila species ovipositing on cherry fruits of different stages. Population Ecology, Vol. 48: 233-237.
MORADI-VAJARGAH, M., GOLIZADEH, A., RAFIEE-DASTJERDI, H., HASSANPOUR, M., NASERI, B., 2011. Population density and spatial distribution pattern of Hypera postica in Ardabil-Iran. Notulae Botanicae Horti Agrobatanici Cluj-Napoca, 39 (2): 42-48.
MORAL GARCIA, F. J. 2006. Analysis of the spatio-temporal distribution of Helicoverpa armigera Hb. in a tomato field using a stochastic approach. Biosystems Engineering, 93: 253-259.
MUKER, M. K. and GUPPY, J. C. 1972. Notes on the spatial pattern of Hypera postica (Coleoptera: Curculionidae) on alfalfa. The Canadian Entomologist, 104: 1995-1999.
PARK, Y. L. and TOLLEFSON, J. J. 2005. Spatial prediction of corn rootworn (Coleoptera: Chrysomelidar) adult emergence in Iowa cornfields. Journal of Economic Entomology, 98: 121-128.
PARK, Y. L., KRELL, R. K. and CARROLL. M. 2007. Theory, technology, and practice of site-specific insect pest management. Journal of Asia Pacific Entomology, 10:89-101.
PEDIGO, L. P. 2004. Entomology and Pest Management (4th Ed). Prentice-Hall of India Pvt. Ltd, New Delhi, India. 742 pp.
PULAKKATU-THODI, I., REISIG, D. D., GREENE, J. K., REAY-JONES, F. P. F. and TOEWS, M. D. 2014. Within-field spatial distribution of stink bug (Hemiptera: Pentatomidae)-induced boll injury in commercial cotton fields of the Southeastern United States. Environmental Entomology, 43 (3): 744-752.
RIJAL, J. P., BREWSTER, C. C. and BERGH, J. C. 2014. Spatial distribution of grape root borer (Lepidoptera: Sesiidae) infestations in Virginia vineyards and implications for sampling. Environmental Entomology, 43: 716-728.
RONG, J., DIAN-MO, L., BAO-YU, X., ZHE, L. and DONG-LI, M. 2006. Spatial distribution of oriental migratory locust (Orthoptera: Acrididae) egg pod populations: implications for site–specific pest management. Environmental Entomology, 35: 1244-1248.
SCHOTZKO, D. J. and SMITH, C. M. 1991. Effects of host plant on the between-plant spatial distribution of the Russian wheat aphid (Homoptera: Aphidodae). Journal of Economic Entomology, 84: 1725-1734.
SCIARRETTA, A. and TREMATERRA, P. 2014. Geostatistical tools for the study of insect spatial distribution: practical implications in the integrated management of orchard and vineyard pests. Plant Protestation Science, 50: 97-11.