Abstract:
The study was conducted in the three mungbean growing locations/regions of Bangladesh viz.,
Bansal. Jessore and Gazipur during March 2005 to March 2006 to explore the distribution of
whitefly. Bamisin (abaci Genn. and the incidence of Mungbean yel/ow mosaic virus (MYMV)
disease infection in mungbean (Vigna radiata) as well to study the climatic factor(s) as the basis
for regulating them. The incidence of whitefly and MYMV infection were the maximum in
Barisal (253.7 adults and 82.90 nymphs/20 plants, and 37.33% leaves and 57.20% plants
infection, respectively) and the lowest in Jessore (39.0 adults and 10. I 9 nymphs120 plants, and
18.20% leaves & 16.50% plants infection, respectively). The rate of MYMV infection in leaves
and plants were positively correlated with the incidence of both whitefly adult and nymph. The
climatic factors were attributed to the variations of whitefly incidence as well as performance of
mungbean in locations. Among three locations, macroclimatic temperature (3 I .5°C), RH
(84.44%) and rainfall (1.47 mm) as well as microclimatic temperature (25.6°C) and RH (77.8%)
within crop canopy of mungbean were the highest in Jessore, which were detrimental to the
incidence of whitefly. Conversely, macroclimatic temperature (28.4°q and RH (76.44%);
microclirnatic temperature (21.53°(') and RH (73.73%) were the lowest in Barisal, which played
as the favorable factors lor whitefly population. Both macro and microclirnatic temperature. RH
and rainfall were negatively correlated to the incidence of whitefly. Accordingly, the incidence
of whitefly and MYMV infection were the maximum in Barisal and minimum in Jessore and
intermediate in Gazipur. Thus yield attributes were better and higher yield (1160.6 kg/ha) was
obtained in Jessore, which was followed by Barisal (866.7 kg/ha), while the yield was minimum
(414.7 kg/ha) in Gazipur.
