Screening of Fungal Extracts for Weed Germination and Growth Inhibitory Activity
Panadda Phattanawasin, Kanawan Pochanakom, Nusara Piyapolrungroj, Uthai Sotanaphun, Siriporn Zungsontiporn
The screening for weed germination and growth inhibitory activity of crude extracts at 35 mg/ml from twenty fungal species was examined in this study. The activity was tested against Mimosa pigra Linn. and Echinochloa crus-galli [L.] Beauv.. Results indicated that crude extracts from Aspergillus fischeri TISTR 3272 and Asp. usamii TISTR 3258 showed remarkable germination and growth inhibition on both weeds. Fusarium poae TISTR 3321 and Asp. candidus TISTR 3268 extracts exhibited excellent weed germination inhibition on M. pigra whereas crude extracts from F. solani TISTR 3436 and Asp. niger TISTR 3274 showed strong germination inhibition only against E. crus-galli. All fungal extracts exhibited different degrees of growth inhibitory activity on root of both weeds as compared with the control. The growth inhibitory effects on root were also found to be higher than that on shoot. The results from this study revealed potential fungal species that could be used as a source of natural herbicides in the future.
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