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Evaluation of using some biological control factors of control seeds rot damping-off disease on Okra plant caused by Fusarium solani and Rhizoctonia solani fungi | ||
| journal of kerbala university | ||
| Article 1, Volume 13, Issue 4, 2017, Pages 250-260 PDF (0 K) | ||
| Abstract | ||
| The study aims to evaluation the efficacy biological fungusTrichoderma harizanum , bacteria Bacillus cereus and Gntanol fungicide in control seeds rot damping-off disease on Okra plant caused by Fusarium solani and Rhizoctonia solani fungi . The results of the laboratory that fungus T. harzianum have high antagonistic activity against the two fungi pathogen which the degree one (1) according to Bell measurement. Whereas the B. cereus bacteria give high inhibition rate with fungal isolates F.s1 and R.s2 which is appeared (80 and 80.55)% respectively .Also Gntanol fungicide give inhibition rate 100% against these two pathogenic fungi on PDA media in comparison with the control factor which have the rate of inhibition 0% .Results also show the efficacy of B. cereus bacteria in increase germination rate in presence of two fungi F. solani and R. solani (80.25 and 80)% respectively. The germination rate increase (80 and 77.5)% respectively with use of T. harzianum fungus too in the presence of these two fungi. From the other side, the results appeared that the presence of the highest rate of germination which is reached (88 and 85)% respectively when we use the full biological treatment .Result revealed under conditional that use B. cereus bacteria decrease the severity of infection with these two fungi F. solani and R. solani (20 and 22.25)% respectively , and infection rate to (32 and 35)% respectively. So biological T. harzianum fungus decrease the severity of infection with two fungi (22.5 and 25)% respectively , and decrease the infection rate to (25 and 30)% respectively. And caused full biological treatment decrease the severity of infection to (16 and 18)% and infection rate to (23 and 24)% respectively. compared with two fungi treatment only which gives severity of infection (80.5 and 85)% respectively and infection rate 100% for both fungi. | ||
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