EVALUATION OF THE EFFECTS OF SALICYLIC ACID, HARMAL AND TEA EXTRACTS ON MECHANICAL TRANSMISSION OF CUCUMBER MOSAIC VIRUS

Subject Areas : دو فصلنامه تحقیقات بیماریهای گیاهی

Masoud Rahmanian ¹ , Kavous Ayazpour ²

1 - Department of Microbiology, Shiraz Branch, Shiraz, Iran
2 - Rezvan

Received: 2021-02-06 Accepted : 2021-11-13 Published : 2020-11-21

Keywords: Salicylic acid, Green Tea, Cucumber mosaic virus, Peganum harmala, black tea,

Abstract :

Cucumber mosaic virus (CMV) is one of the most important viruses infecting cucurbit plants in Iran and the world. The effects of spraying cucurbit seedlings with some herbal extracts and salicylic acid on preventing the viral infection in cucumbers was studied in a completely randomized design with 6 repeats. Treatments were 0.02% solution of salicylic acid, 3% extracts of harmel, black tea and green tea. Distilled water used as control. Plants were inoculated mechanically using the sap of infected plant after spraying of treatments. This study was performed under greenhouse conditions at Islamic Azad University, Jahrom, in 2015. Plants were observed for a month post treatment, and finally the infection of plants was examined by ELISA. Some herbal extracts could significantly reduce the infection rate of CMV. The recorded inoculation rates for salicylic acid, harmel extract, black tea extract, green tea extract and distillated water treatments were 33.3%, 25%, 58.3%, 66.7% and 100%, respectively. In conclusion, the application of harmel extract or salicylic acid solution at an early growth stage can significantly control plant CMV infections.

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