Abstract：
:Anthracnose disease in the cotton plant caused by fungal pathogen Colletotrichum gossypii. It is supposed to be most critical diseases in the cotton crop as it causes infection and leads to complete damaging of the cotton crop by infecting the leaves, stems, and bolls in the field. The disease control is challenging due to the absence of an effective fungicide without damaging the farmer health and environment. So the series of experiments were designed to assess the antagonistic activity of biosurfactant released by strain Bacillus licheniformis OE-04 against the anthracnose causing agent in cotton and this strain was screened out from forty eight strain of rhizobacteria. We also estimated the heat stability and pH range and toxicity of biosurfactant produced by strain 0E-04. The results showed that biosurfactant has maximum antifungal activity against C. gossypii. In vitro study concluded that the biosurfactant can reduce fungal activity by inhibiting the spore germination of C. gossypii. Moreover, the biosurfactant also has wide pH and temperature range. We observed Antifungal activity of biosurfactant at 5 to 10 pH range and temperature range was also wide from room temperature to 100 °C. We also observed the toxicity of biosurfactant produced by Bacillus licheniformis against zebra fish (Danio rerio). We were noticed that biosurfactant have least harmful effect with maximum concentration. The study confirmed that biosurfactant of Bacillus licheniformis have high pH and heat stability range with least harmful effects so it can be a good replacement of chemical pesticides for cotton anthracnose control.
journal_name
Pestic Biochem Physioljournal_title
Pesticide biochemistry and physiologyauthors
Nawaz HH,Nelly Rajaofera MJ,He Q,Anam U,Lin C,Miao Wdoi
10.1016/j.pestbp.2018.02.007subject
Has Abstractpub_date
2018-04-01 00:00:00pages
33-42eissn
0048-3575issn
1095-9939pii
S0048-3575(17)30584-9journal_volume
146pub_type
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