ECO-FRIENDLY MANAGEMENT OF Mungbean Yellow Mosaic Virus (MYMV) THROUGH BARRIER CROPS AND COLORED PLASTIC MULCHES

Abstract

Mungbean (Vigna radiata L.) is an excellent and easily digestible dietary source of plant protein. Mungbean yellow mosaic disease caused by Mungbean yellow mosaic virus (MYMV) which is transmitted by whitefly (Bemisia tabaci), an important constraint of mungbean cultivation. A field experiment was conducted at the central farm of Sher-eBangla Agricultural University (SAU), Dhaka during March to June, 2021. The prime aim

of the study was to manage the Mungbean yellow mosaic virus (MYMV) by controlling the

insect

vectors using barrier crops (sesame, linseed, maize, coriander) and colored plastic mulches (red, blue, silvery-grey, black). BINA released variety BINAmoog-5 was used as a planting material in the experiment. Morphological and physiological parameters were all considerably impacted in this study. Disease incidence and percent disease index of MYMV was significantly varied among the treatments. The lowest disease incidence (5.35%, 8.95%, 17.91% per plot and 5.24%, 11.75%, 19.09% per plant at 30, 45 and 60 DAS, respectively) was estimated when maize was used as a barrier crop while the highest disease incidence (25.92%, 35.52%, 61.10% per plot and 27.66%, 34.15%, 59.72% per plant at 30, 45 and 60 DAS, respectively) was found in control treatment. In case of colored plastic mulches, the lowest disease incidence (8.56%, 14.35%, 23.91% per plot and 8.23%, 15.76% 24.70% per plant at 30, 45 and 60 DAS, respectively) was recorded when silvery-grey colored plastic mulch was used. The lowest percent disease index (5.55%, 13.39% and 20.16% at 30, 45 and 60 DAS, respectively) was also found when maize was used as a barrier crop. In case of colored plastic mulches the lowest percent disease index (7.42%, 17.97% and 26.70% at 30, 45 and 60 DAS, respectively) was computed when silvery-grey colored plastic mulch was used. Again, the highest percent disease index (28.14%, 37.71% and 64.08% at 30, 45 and 60 DAS, respectively) was found in control treatment. The highest chlorophyll content, number of flower, pod and yield was measured and counted when maize was used as a barrier crop and silvery- grey colored mulch was used as a colored plastic mulch. However, maize or silvery-grey colored plastic mulch uniquely or combindly can be used to control whitefly (vector) for the management of MYMV.