MANAGEMENT OF DAMPING OFF DISEASE AND ENHANCEMENT OF AFRICAN NIGHTSHADE (SOLANUM SCABRUM) GROWTH THROUGH THE USE OF BACILLUS SUBTILIS AND TRICHODERMA ASPERELLUM
Journal Title: ASIAN JOURNAL OF NATURAL & APPLIED SCIENCES - Year 2017, Vol 6, Issue 2
Abstract
Damping off, caused by Pythium aphanidermatum, is one of the diseases of economic importance in African Nightshade (Solanum scabrum) production in Kenya and can result to up to 100% seedling loss. The efficacy of antagonistic bacterial and fungal isolates of Bacillus subtilis and Trichoderma asperellum respectively were evaluated against P. aphanidermatum in African Nightshade in greenhouse studies. Seeds of three broad leaved varieties viz. ‘Olevolosi’, ‘Abuku1’ and ‘Abuku2’ were coated with 107 CFU/gram of B. subtilis and T. asperellum either singly or in combination. The treated seeds were planted in coco peat media inoculated with 107 CFU/ml Pythium aphanidermatum. The pre- and post-emergence damping off was suppressed in the seeds treated with isolates of B. subtilis and T. asperellum either singly or in combination in the three varieties. Furthermore, among the growth parameters, unit leaf rate and Leaf weight fraction were significantly promoted among the three African Nightshade varieties. Similarly, seeds of Abuku1 and Olevolosi varieties coated with isolates of the biological control agents produced enhanced the yield 1.5 times relative to the uncoated. All three African nightshade varieties seeds coated with B. subtilis and T. asperellum had expressed sufficient root colonization. Application of with B. subtilis and T. asperellum may reduce the incidence of damping off disease and consequently promote growth and yield of African nightshade.
Authors and Affiliations
Patrick Juma, Rainer Meyhöfer
Keywords
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