DefinePK

Abstract

Okra is an economically essential vegetable crop and grown in tropical and sub-tropical regions of the world including Pakistan, Experiment was conducted under RCBD design having three replications at Latif Experimental Farm, Sindh Agriculture University Tandojam. Under the four treatments Viz., T1 = control, T2 = black plastic mulch, T3 = white plastic mulch, and T4 = yellow plastic mulch. The observations were recoding for incidence, severity of the symptoms on plants after 2 weeks of sowing Yield was recorded from each treatment. Results revealed that significantly higher incidence 86.667 and 80.00% was recorded in the treatment of yellow mulch in the Puja and Tulsi variety respectively as compared to the control 10 weeks after sowing (WAS). lower incidence 33.33 and 53.333% was noticed in the black-coloured mulch treatment of the Tulsi and Puja variety respectively at 10 WAS. Similarly, 53.333% incidence was noticed in white mulch in the Tulsi variety and 60.000% incidence of white mulch in the Puja variety. A significantly higher severity score 3.1000 was recorded on yellow mulch in the Puja variety at 10th WAS followed by 2.9000 severity score in the same treatment in the Tulsi variety and control treatment of the Puja variety. A significantly lower severity score of 1.7333 was recorded in black mulch in the Tulsi variety followed by 1.8 severity score in the same treatment in the Puja variety, 2.0333 severity score in white mulch in the Tulsi variety, 2.2667 in white mulch in the Puja variety and 2.4000 score in control treatment of the Tulsi variety at 10 WAS. Furthermore, the results revealed that different plastic mulch for greatly influenced the yield of okra to either variety. The black mulch has increased 108.2 and 109.9% yield in the Tulsi and Puja variety, respectively. White plastic mulch remained second to increase the yield of okra 51.7 and 51.95 in the Tulsi and Puja variety respectively. However yellow plastic mulch showed a negative impact on the yield or it was 13.7 and 14.0% disease in the field or compared to control in either variety. It is concluded from findings that black-coloured mulch significantly reduced the incidence and severity of viral disease in the okra plants and enhanced the yield.