Watermelon is a shallow rooted crop, hence intercultural activities can be done very comfortably.
Often,weeding is done between the rows of crops. Weeds should not grow too much in the field, in the event of large weeds growing in the field, they should be uprooted by hand and separated.
Spray chemical weedicide like Pendimethalin 30% CS @ 700 ml/acre during 1 to 3 days before germination of weeds .
For control of narrow leafed weeds use Quizalofop ethyl 5% EC @ 400 ml / acre at 2-4 leaf stage with or Propaquizafop 10% EC @ 400 ml/acre at 10 to 25 days of crop stage.