Study of Reducing Water Consumption with Irrigation Method in Different Common Bean (Phaseolus vulgaris L.) Cultivars at Shahrekord Region Foroud Salehi1 and Bijan Haghighati-Boroujeni2 1-Crop and Horticultural Sciences Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, AREEO, Shahrekord, Iran. 2- Soil and Water Sciences Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, AREEO, Shahrekord, Iran. *Corresponding author E-mail: foroud_salehi@yahoo.com Received: 10 March 2019 Accepted: 20 June 2019 Abstact Common bean is a product cultivated in Chaharmahal and Bakhtiari province with high water consumption and in recent years, due to water scarcity, its cultivation has declined sharply. In this experiment, different methods of reducing water use with changing in irrigation method in bean cultivars was investigated. Factorial experiment was conducted in a randomized complete block design with three replications 2016 and 2017 at Chahartakhte Research Station in Shahrekord region. The first factor was cultivar in three levels (Koosha chitti bean, Yaghut ​​red bean and Dorsa white bean), and the second factor was the irrigation method in three levels (strip-drip irrigation, furrow irrigation, and conventional (flood) irrigation (strip surface irrigation)). Combined analysis results showed that plant height, grain yield, yield components, and water productivity were affected by bean cultivars and irrigation methods. The highest grain yield was obtained from Yaghut red bean cultivar, which had a significant difference with Koosha chitti bean cultivar. The highest water productivity was obtained from Yaghut red bean cultivar, which had a significant difference with other common bean cultivars. The highest water productivity was obtained from strip surface irrigation, which did not have a significant difference with strip drip irrigation, while water use in strip drip irrigation was far less than strip surface irrigation. Therefore, it is possible to use drip irrigation with less water consumption. Keywords: Common bean, Yield, Reduce irrigation, Water productivity. تفاصيل المقالة

Original ResearchEvaluating the Resistance of Various Potato Genotypes to Early Blight Disease Caused by Alternaria alternataNeda Peymani1, Ahmadreza Golparvar1*, Mehdi Nasr-Esfahani2, Esmaeil Mahmoudi3, Majid Shams11- Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran2- Department of Plant Protection Research, Isfahan Agriculture and Natural ResourceResearch and Education Center (AREEO), Isfahan, Iran3- Department of Plant Pathology, College of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran*Corresponding author E-mail: a.golparvar@khuisf.ac.irReceived: 10 March 2020 Accepted: 22 May 2020AbstractEarly blight disease (caused by Alternaria alternata (Fr.) Keissler) is one of the most important potato diseases around the world which causes the death of the leaf tissues and sharp decrease in the final yield. Identifying and using resistant potato cultivars is one of the effective methods to deal with this disease. In the current study, the resistance of 46 potato genotypes (including 24 genotypes of Isfahan and 22 common genotypes of Isfahan and Shahrood) were investigated in the field by evaluating the severity of the disease in six levels from 0 to 6 (0-100%). The results showed that there were significant differences between the resistances of different potato genotypes. Three resistant genotypes (R1/33/10, R2/33/3 and R2/33/21) and three sensitive genotypes (8707/106, 8703/804 and 8707/112) were selected to investigate the changes of plant biomass and were inoculated with the spores of the disease-causing fungus (106) in the greenhouse. Biomass parameters showed significant decrease compared to the control samples. The amount of this decrease was much higher in sensitive genotypes than resistant genotypes. The knowledge obtained from this study can be useful for the production of disease-resistant potato cultivars. تفاصيل المقالة