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Articles by D.K.G. Ayanru
Total Records ( 2 ) for D.K.G. Ayanru
  C.L. Igeleke and D.K.G. Ayanru
  Floral and fruit tissues of two cultivars of plantain (Musa paradisiaca L.), P100-F (susceptible) and P200-I (resistant to cigar-end rot disease), grown side by side in a field plot in Benin City, Nigeria, were analysed for eight mineral elements-N, P, K, Ca, Mg, Fe, Na and Zn. Calcium, sodium and zinc concentrations were higher in bracts (0.151, 0.265 and 0.490%) and immature peel (0.520, 0.629 and 0.063%) of the P100-F than in samples of the P200-I cultivar (0.077, 0.210 and 0.032%) and (0.482, 0.490 and 0.032%), respectively. Concentrations of P and K were significantly lower in all tissues analysed of the susceptible (P100-F) than the resistant (P200-I) cultivar. The relevance of these results in relation to the management of cigar-end rot disease of plantain is discussed.
  C.L. Igeleke and D.K.G. Ayanru
  An evaluation of three fungicides, namely, benomyl [methyl l-(butyl-carbamoyl)-2-benzimidazole carbamate], calixin (tridomorph) and dithane M-45 (mancozeb), was carried out for their inhibitory effects on Verticillium theobromae, the causal organism of cigar-end rot disease of plantain (Musa paradisiaca). The LD50 of calixin, benomyl and dithane M-45 in inhibiting mycelial growth, were 0.14, 0.98 and 535.17 μg mL-1, respectively. Calixin was also the most effective in conidial germination inhibition with an LD50 of 21.78 μg mL-1, as compared with dithane M-45 86.39 μg mL-1 and benomyl 275.50 μg mL-1. Germ tubes of the test organism were distorted by the fungicides at varying concentrations. Calixin had greater distortion effect at a lower concentration of 10 μg mL-1, dithane M-45 (100 μg mL-1) and benomyl (1000 μg mL-1). The relevance of these results in relation to the control and management of cigar-end rot disease of plantain is discussed.
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