Effect of Different Planting Time on Tomato Yellow Leaf Curl Virus (TYLCV) of Tomato and Its Impact on Yield in Bangladesh

Tomato yellow leaf curl virus (TYLCV) is infamous for tomato-infecting viruses and causes a huge loss of the yield irrespective of the planting time. So, in order to find out the effect of different planting time on TYLCV disease of tomato and its impact on yield. A study was carried out at the Department of Plant Pathology, Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh during the period of October 2016 to May 2017. Two popular BARI released variety namely BARI Tomato-14 and BARI Tomato-16 were used in this study that was transplanted at three different planting times (1st planting time on 1st November 2nd planting time on 15th November and 3rd planting time on 1st December 2016). The lowest percent TYLC disease incidence (12.42%) and percent disease severity (15.37%) were found in 3rd planting (1st December) in BARI Tomato-16 variety, respectively. Under the present study, considering the percentage of TYLC disease incidence and severity, BARI tomato-16 on 1st December showed better performance comparing others. The 3rd planting (1st December) and BARI Tomato-16 variety were found to have the highest yield (77.23 ton/ha) and promising the lowest level of percentage of disease incidence (12.42%) and percent disease severity (15.37%) against TYLCV. A strong positive correlation was obtained between the whitefly population and the percent disease incidence of TYLCV. The whitefly population and the yield of tomato were negatively correlated with each other. The yield was also found significant and negatively correlated with the percentage of TYLCV disease incidence.