تاثیر عصاره الکلی پنج گیاه دارویی بر مهار قارچ Alternaria alternata، عامل بلایت زودرس گوجه‎فرنگی در شرایط درون‎شیشه‎ای

The fungus Alternaria alternata (Fr.) Keissl. 1912 is one of the most important fungal pathogens that affects the post-harvest quality and marketing of tomatoes (Solanum lycopersicum L.) during storage. In order to investigate the inhibitory effect of ethanolic extract of five medicinal plants, Allium haemanthoides Boiss. & Reut. ex Regel, Dorema aucheri Boiss., Ferula assa-foetida L., Ferulago angulata Boiss. and Rheum ribes L. on the growth of A. alternata colony, in vitro, an experiment was conducted as a completely randomized design based on factorial pattern. The results of this experiment showed that all ethanolic extracts had an inhibitory effect on the growth of A. alternata. The best extracts to stop the growth of fungal colonies (100% inhibition of fungal colony growth) are A. haemanthoides extracts (concentrations of 400, 600 and 800 ppm,), D. aucheri and F. assa-foetida (at concentrations of 600 and 800 ppm). The best concentration in terms of inhibition in the other two extracts (R. ribes and F. angulata) was 800 ppm (with 94.55 and 98.52% inhibition, respectively). The lowest percentage of inhibition of fungal colony growth was allocated to R. ribes and F. angulata. extract treatments at 200 ppm (with 53.59 and 60.74% inhibition, respectively). In general, based on these findings, it can be said that some medicinal plants in western Iran, such as the plants used in this study, contain a rich source of compounds with antifungal activity. Based on the present results, it can be said that the ethanolic extract of these plants has the ability to inhibit the fungus in vitro. However, additional tests are needed for these plant extracts to be able to successfully protect the product against fungi in practice.