questions: asking for the control measure to control aphids and caterpillars in his radish crop cultivation done in a land of 2 bigha. 
 answers: suggested to spray 'malathion 50 ec'solution  @ 2 milli litres per 1 litre of water to get control on these pests rather to wipe off in a volume of 180 litres for 3 bigha of land.