عكس العمل ارقام نخود CICER ARIETINUM L. به بيماري برق زدگي [ASCOCHYTA RABIEI )PASS.( LAB] در منطقه مشهد

Response of chickpea (Cicer arietinum L.) cultivars to ascochyta blight [Ascochyta rabiei (Pass.) Lab.] at Mashhad

Ascochyta blight is the most widespread and destructive disease in chickpea growing areas. North Khorasan province is talented to chickpea cultivation and has a high level (alto this disease. In the present study , disease responses of nine chickpea genotypes were evaluated under greenhouse and field conditions, for their response to a local A rabrei isolate. In greenhouse experiment, the genotypes were sown in randomized complete block design with five replications. Three weeks old seedlings were inoculated with the fungus spore suspension and were maintained at 20°C and -e900o relative humidity for two weeks. In field experiment, genotypes were sown in split-plot design with three replications, so that the main plots and subplots were included inoculation treatment and cultivars, respectively. In spite of no resistant genotypes in field or greenhouse evaluations, Karaj 12-30-61 , Ghazvin, 12- 60-11 and 12-071-10105 showed tolerance in greenhouse and field. But Kaka was tolerant in field and susceptible in greenhouse. In Ghazvin cultivar. low yield is apparently due to reduction of pods number per plant. Among nine genotypes, Ghazvin and Karaj 12-30-61 were the most tolerant genotypes to blight. Both Jam and Kourosh were very susceptible but disease progressed until podding stage in Jam.