فریدون پاداشت Articles List

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1 - Evaluation of efficacy of Aliado and Cyazofamid fungicides against downy mildew of local and commercial cucumber in Guilan
Elham Ghasemi Fereydoun Padasht Dehkaei Bizhan Yaghoubi Alireza Torang

Downy mildew is one of the most important foliar disease of field and greenhouse cultivated cucumber which caused by the Pseudoperonospora cubensis and engender significant economic damages in Iran annually. The effect of ALIADO with dose rates of 1, 2, and 3 g/l and Cy More

Downy mildew is one of the most important foliar disease of field and greenhouse cultivated cucumber which caused by the Pseudoperonospora cubensis and engender significant economic damages in Iran annually. The effect of ALIADO with dose rates of 1, 2, and 3 g/l and Cyazofamid (Ranman® SC 400) at the rate of 0.5 ml/l on the control of the disease was assessed on local (susceptible) and commercial (very susceptible) cultivars in the field condition. The experiment was done in randomized complete block design with 4 replication (local cultivar) and 3 replication (PS cultivar), in Kiashahr which has a history of cucumber cultivation and downy mildew disease occurrence. Spraying was carried out immediately after the appearance of disease symptoms and was repeated at intervals of 10, 7 and 5 days. For evaluation of each treatment, data was recorded based on disease severity on the leaves from 4 plants in each plot after 10, 7 and 5 days of fungicides application. Data collected were analyzed by SPSS software and Tukey test. Results showed that fungicide application caused significant decrease in the disease severity compared with the control treatment. The disease control rates were 89.3%, 85.8% and 79.7% on the local cultivar and 86/1%, 85.1% and 77.79% on the commercial cultivar in Cyazofamid and ALIADO with dose rates 3 and 2g/l respectively after the last spraying. Manuscript profile
Open Access Article
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2 - Study on the fungicidal effects of WELGRO® Cu+Zn in controlling rice blast disease under field condition
Hadis Shahbazi Freydoun Padash dehkaei Faramarz Alinia Seyedeh Akram Mousavi Qaleh Roudkhani

Rice blast disease caused by Pyricularia oryzae Cavara is considered the most damaging disease of native rice cultivars in the north of Iran, so its chemical management has a special priority. In this study, the efficacy of 0.5, 1, and 2 kg/ha of WELGRO® (34.5% Copp More

Rice blast disease caused by Pyricularia oryzae Cavara is considered the most damaging disease of native rice cultivars in the north of Iran, so its chemical management has a special priority. In this study, the efficacy of 0.5, 1, and 2 kg/ha of WELGRO® (34.5% Copper and 37.3% Zinc) in controlling rice blast disease in comparison with 0.5 kg/ha of Tricyclazole (75% WP) were evaluated in field conditions in a randomized complete block design with four replications, in Astaneh-ye Ashrafiyeh and Rasht. For this purpose, Hashemi seedlings were transplanted at a distance of 20×20 cm in the 4×5 m plots. Treatments were applied at the first appearance of disease symptoms in the region for leaf blast and after heading for panicle blast. In the control treatments, water was sprayed. Leaf and panicle blast disease percentages were assessed seven days after the first spraying and one week before harvest, respectively. The results showed that the concentration of 2 kg/ha of WELGRO® compared to the control not only reduced leaf, node, neck, and panicle blast disease, 25.77, 24.22, 38.44, and 8.41% in Rasht and 58.70, 29.05, 43.11, and 43.15% in Astaneh-ye Ashrafiyeh, respectively, but also its efficacy in controlling blast disease and its yield and yield components was very close to that of Ticyclazole. It should be noted that the results of the present study were obtained in a situation where the severity of the blast disease in the experimental field was not in an outbreak state. If the disease is in epidemic conditions, not only the use of 2 kg/ha WELGRO®, but also the 0.5 kg/ha tricyclazole is not efficient for blast disease control. If a rice blast epidemic is not predicted, the use of WELGRO® in rotation with other fungicides can control the disease, delay fungicide resistance, and also it can be used in organic rice production. Manuscript profile

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