THE PATHOGENICITY OF CUCUMBER MOSAIC VIRUS (CMV) AND PUTATIVE BITTERLEAF MOSAIC VIRUS (BLMV) ON Celosia argentea

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Date

2014

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Faculty of Agriculture, Taraba State University, Jalingo.

Abstract

A greenhouse study was conducted to determine the pathogenic effect of Cucumber mosaic virus (CMV) and Putative Bitterleaf mosaic virus (BLMV) on a local variety of Celosia argentea. The viral inoculi were extracted by homogenization from infected leaves of cowpea and bitterleaf that were obtained from the International Institute of Tropical Agriculture (IITA) Ibadan. Seeds of Celosia argentea were sown in plastic pots that were filled with sandy loam soil, previously steam sterilized at 1200C for 2hours. The plants were mechanical inoculated 3weeks after planting with either CMV, BLMV or Buffer (control). Each treatment was replicated 4 times in a Completely Randomized Design (CRD) manner. The results of the experiment revealed that the C. argentea was susceptible to infection with CMV and BLMV. Percentage severity of the viral infections were significantly different (p=0.05) compared with the control. The results indicated that CMV had the significantly highest effect on percentage disease severity (53.1%), followed by BLMV (16.5%)and control plants had no infection. Subsequent growth and yield attributes in the virus inoculated plants were also generally lower than those recorded for the control. The significantly lowest stem girths were recorded in plants inoculated with CMV (1.6cm), followed by BLMV (2.8cm), while the significantly highest stem girths were obtained in the control plants (4.2cm). The study found C. argentea to be susceptible to infection by CMV and BLMV and thus advocates the need for effective control measures for high productivity of the vegetable.

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Keywords

Celosia argentea, Pathogenicity, Cucumber Mosaic Virus, Bitterleaf mosaic virus, Inoculation.

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