Evaluation of post-emergence herbicides in greengram

Abstract

Weeding and hoeing are common cultural and manual weed management methods for greengram.
Manual weeding at right stage is difficult, time consuming and expensive due to intermittent rainfall
during rainy season and scanty labour, therefore, farmers rarely adopt manual weeding for weed
control. Under such situation, herbicides use with suitable dose remains the pertinent choice for
controlling the weeds. Herbicides in isolation, however, are unable do complete weed control because
of their selective kill. Manual weeding or spraying of recommended pre-emergence herbicide is
some time difficult in rainy season for efficient weed control and pre-emergence herbicides controls
weed during early growth stage, but later, newly germinated weeds flora cannot be controlled by
pre-emergence application. This warrants the use of post emergence herbicide for weed control.
Under this situation, supplement of herbicides along with physical method prove in augmenting
the yield of green gram (Gupta et al. 1990). Thus, an experiment was conducted with an aim to
control early weeds of the greengram crop during rainy season with the help of combinations of pre
and post applied herbicides.