Adabi et al
Greener Journal of Agricultural Sciences Vol. 3 (8), pp. 644-651, August 2013.
Influence of Irrigation Regimes and Poplar Clones on Densities of Empoasca decedens (Hom.: Cicadellidae), Salicicola kermanensis (Hom.: Diaspididae) and Diaspidiotus slavoncus (Hom.: Diaspididae) in Karaj, Iran
S. Tahriri Adabi1*, S. E. Sadeghi2 and R. Bagheri3
1Department of Horticulture and Plant Protection, Faculty of Agronomy, Armenian State Agrarian University, Yerevan, Armenia.
2Department of Forest and Range Protection, Research Institute of Forests and Rangelands,
P. O. Box: 13185-116, Tehran, Iran.
3Department of Poplar Research, Research Institute of Forests and Rangelands, Tehran, Iran.
2Email: ebrasadeghi @ gmail. com, Phone: 98-21-44580282, Fax: 98-21-44196575
*Corresponding Author’s Email: s_tahririadabi @ yahoo. com
During the years 2009-2010 effects of irrigation regimes and nine poplar clones on density of three sucking pests, Empoasca decedens Paoli, Salicicola kermanensis (Lindinger) and Diaspidiotus slavoncus (Green) were studied in Alborz Research Station of Karaj. This study was carried out under split plot design. 4, 8 and 12 days irrigation intervals were considered as main treatment by 3 replications and nine poplar clones as secondary treatments. For sampling of E. decedens and D. slavoncus, separately four trees from each secondary plot and eight leaves from each tree were chosen, randomly. Then numbers of different nymph instar of E. decedens and the scales were enumerated. During S. kermanensis sampling, first four trees from each secondary plot then four branches from each tree were selected. Next the numbers of scales on 10 cm of each branch were counted. Finally the numbers of each pest were calculated in surface unit. Obtained data analyzed by SAS software. The results showed irrigation regimes, poplar species and clones and interaction of them affected on the pests densities, significantly (α< 0.05). The highest density of them was seen under 12 day irrigation regimes. The highest density of E. decedens was on P. a. 44.9. The highest density of S. kermanensis was obtained on P. n. 42.78 and P. trichocarpa. The highest density of D. slavoncus was on P. n. 42.78. The highest densities of E. decedens and D. slavoncus were observed on P. a. 44.9 and P. n. 42.78 in 12 days irrigation regimes, respectively. Also, the highest density of S. kermanensis was on P. n. 42.78 and P. trichocarpa under 12 days. It seems irrigation could change the density of the pests on poplar.
Keywords: Empoasca decedens, Salicicola kermanensis, Diaspidiotus slavoncus, Poplar, Clones, Irrigation regimes.
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