Showing 3 results for Nasr Esfahani
A. Nasr Esfahani, A. Mousavi Bak,
Volume 8, Issue 3 (fall 2004)
Abstract
The black dot disease of potato is a fungal disease caused by Colletotrichum coccodes (syn. C. atramentarium) that produces accervuli on infected underground plant parts which appear as black dots. The disease appears at the flowering stage and develops up to the season end. The survey on black dot disease of potato in two successive years indicated that the infection percentage is 39.86 in Feraydan (Isfahan), one of the most important potato production regions in Iran. Studies on usual cropping patterns with, potato including, wheat alfa-alfa, barley and fallow showed that in terms of disease infection, one year rotation with fallow reduced the disease severity almost to half compared with control and other cropping patterns. Biological seed and soil treatment, with Trichoderma harzianum in various spores density reduced the disease in various degrees significantly and increased the potato plant growth factors including the number of stems, foliage fresh and dry weights, and also the yields in cases of spore applications, depending upon the type and application dosage. Comparative susceptibility assessments of 24 commercial potato varieties to the black dot disease indicated that the variety Desiree was the least concerned in terms of infection, followed by Scort ,Casser, Casmos, Carlita and Moren , where as Marijke, Cosima and Monalisa were highly infected in comparison to other tested verities and the rests of varieties were scored within these two ranges.
M. Nasr Esfahani, B. Ansari Pour,
Volume 12, Issue 45 (fall 2008)
Abstract
Pink root-rot disease caused by Pyrenochaeta terrestris is one of the serious diseases of onion fields in Iran and the world. The use of resistant cultivars might be a good alternative as suggested on the basis of the screening at the near end of growing season. The susceptibility assessment of 43 Iranian onion clones in glass-house condition in Isfahan for the last two successive years i.e. 2003-04 indicated that, the clones react independently with various degrees of resistance to the pink root-rot disease and with a high significant effect. The scoring scale was of 0-3 to determine the susceptibility and/or resistance of the clones to the disease, out of which, the two clones, Ramhormoz-Saffiabad and Balochestan-Sarbaz were the most susceptible clones to the pink root-rot disease, and were placed in 2-3 (0-3) scale. But most of the clones were placed in the scoring scale 1-2 (0-3) indicating that they are in the ranges of tolerance. This could be why they still exist and could tolerate the disease and remain safe. The third and/or the resistant clones are those clones that were placed in the scoring scale of 0-1 (0-3), i.e. Naishabor-Ishaghabad, Sarri-Local, Loosha-Golden, Zanjan-Ghotigheseh, Shahrood- local, Azarbayejan-East, Shahrood-Lasjerd, Kashan-White, Yazd-Marvdasht, Azarshahr-Red and Boshehr-Local, respectively. In fact, the two clones Naishabor-Ishaghabad and Sarri-local are the most resistant ones to the pink root-rot disease of onion in these tests. These results indicate that there are certain clones which can be considered in breeding programs and/or cultivations.
Masoud Nasr Esfahani, Ali Talebi, Ehsan Fathi, Ali Akbar Mahdavian Cheshmegol, Abolghasem Felahati,
Volume 30, Issue 1 (spring 2026)
Abstract
The health and sustainability of a watershed are complex issues that must be evaluated from social, economic, and environmental perspectives using a variety of indicators. The objective of this study is to assess the sustainability and health status of the Khansar watershed in Yazd Province based on the modified WHSI model. This model, developed in accordance with local conditions in Iran and the available variables, includes 34 key variables, comprising 13 social variables, 5 hydrological variables, 10 water quality variables, and 6 land-use–related variables. In this study, ten-year data were collected for each variable and scored using quantitative methods. According to the results, 11 variables were in good condition, one variable was moderate, three variables were weak, and 19 variables were in a critical state. The WHSI model analysis showed that the social indicators were in a relatively better condition, whereas the hydrological, water quality, and land-use variables were predominantly in a critical state. The findings of this study also indicated that the health status of the Khansar watershed in Yazd, with a score of 74, falls within the intermediate health category, while its sustainability, with a score of 12, is classified as unsustainable. The results of this research provide a precise depiction of the critical variables and can serve as a foundation for formulating targeted management policies, improving the quality and quantity of water resources, restoring vegetation cover, controlling unsustainable exploitation, and strengthening climate adaptation programs. In doing so, it can play a significant role in enhancing resilience and improving the health and sustainability of the watershed.
