The molecular weight and the degree of deacetylation were found to have an important effect on the growth activities of the pathogens. It has been found that the TUCS is a much better fungicidal agent (about 60 times more) than the pure CS against most of the fungal strains tested. The weekly newspaper started off as a daily. ElYoum ElSabe' is published by 'The Egyptian Publishing, Journalism and Advertising'. The most sensitive to the modified chitosan stress with regard to their germination and number produced were the sclerotia of S. 'ElYoum ElSabe' is the leading digital portal in the region. However, growth tolerance of the modified chitosan was highest for F. solani exhibited the fastest growth of the fungi studied. In the absence of chitosan and its derivative, R. All the prepared thiourea derivatives had a significant inhibiting effect on the different stages of development on the germination of conidia or sclerotia of all the investigated fungi in the polymer concentration range of 5-1000 microg ml(-1). Log in or sign up for Facebook to connect with friends, family and people you know. A chemical method was applied in the present study for chitin and chitosan extraction from carapace. The antifungal behavior of chitosan and its thiourea derivative was investigated in vitro on the mycelial growth, sporulation and germination of conidia or sclerotia of the following sugar-beet: Beta vulgaris pathogens isolated in Egypt, Rhizoctonia solani Kühn (AG(2-2)) Sclerotium rolfsii Sacc. Chitosan (CS) was modified by reaction with benzoyl thiocyanate to give a thiourea derivative (TUCS).
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