questions: pest problem i.e., gandhi bug. 
 answers: spray malathion 50 ec @ 66-70 ml/bigha for 2 times, first during flowering and second after 1 week later.
or spray fipronil 5 sc @ 2m/litre of water for 3 times at 5 days interval.
or spray dursban 20 ec @ 1-2ml/litre of water for 2 or 3 times after 5-10 days interval.