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Keywords

nan

Abstract

Isolation  results from the potato tuber showed appearance of fungi  Rhizoctonia solani , Phoma sp (1) and Phoma sp (2) the result also showed great   antagonism  ability  of  T.harzianum   against  isolated fungi  under laboratory conditions and   Bacillus subtilis  showed  effective mycelium growth inhibition against   isolated fungi  bio-pesticides bioassay of Cryptanol and Tobsin _M  showed  non-significant differences between the fungi in the rates of inhibition percentage .The results of potato disc treated with controlling factors revealed developing dry rot, The biggest inhibition significantly in the development of rot  in  potatoes disc test  was with R. solani and Phoma sp. When they treated with Cryptanol 86.6%, which did not differ significantly from  Phoma sp. (2) with  Tobsin –M and  Phoma sp. (2)  and R. solani Phoma sp. (1) When Its treated with  T. harzianum 80 % and the lowest percentage of inhibition with R. solani when treated  with B. subtilis 53.4% . The results of potato tubers treated  with controlling  factors reveal  that biggest inhibition developing dry  rot  was with Phoma sp. (2) When Its treated  with  Cryptanol  95 % which did not differ significantly from the treatment of % sp. (1) with Tobsin-M or Phoma sp. (1) with  Cryptanol and Phoma sp. (2)  Tobsin –M  92, 90 and 89.1 %, respectively the lowest percentage of inhibition  was with Phoma sp. (2)  when Its treated with B. subtilis  25 %.
https://doi.org/10.33899/magrj.2018.161559
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