Management of Okra Yellow Vein Mosaic Virus (OYVMV) Through Selected Insecticides and Light Reflecting Colored Mulches



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Submitted Feb 12, 2021
Published Feb 24, 2021
10.24018/ejfood.2021.3.1.245

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A field experiment was conducted to evaluate the effect of light reflecting colored mulches and only one time spraying with selected insecticides to control the insect vector of Okra Yellow Vein Mosaic Virus (OYVMV) whitefly (Bemisia tabaci) at the central farm of Sher-e-Bangla Agricultural University, Dhaka-1207. The experiment was carried out in three blocks layouted with RCBD comprising eight treatments viz. T0 (control/no spray), T1 (1 time spray with imitaf), T2 (1 time spray with protect), T3 (1 time spray with tiddo plus), T4 (1 time spray with terbine), T5 (light reflecting silver color mulch), T6 (light reflecting red color mulch) and T7 (light reflecting black color mulch) with three replications. The mulches were used before sowing and insecticides were sprayed at 30 DAS. It was observed that among the light reflecting colored mulches, the lowest disease incidence (11.48%) was recorded in the plots which mulched with red color mulch (T6). Among the insecticides, the lowest disease incidence (30.17%) was recorded in plots that was sprayed with terbine (one time). Yield and yield contributing characters, morphological and physiological features of okra plant that changes due to disease infection which cause damages in okra production and reduce the fruit quality as well as market value was also the part of this study. Yield and yield contributing characters showed significant variance among the selected treatments. In the relationship study, it was noticed that the yield and plant height was showed negative relationship with disease incidence. However, considering all measuring parameters, spraying with terbine (one time) and used red color mulch may be recommended as good management approaches that will give higher okra production and lower disease incidence of Okra Yellow Vein Mosaic Virus (OYVMV).

Keywords: Okra, OYVMV, Whitefly, Insecticides, Light reflecting color mulches

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