Question: asking about visible of ladybird beetle in watermelon and asked about the fertilizer dose of watermelon

Answer: if the ladybird beetle is infesting the plants then spray malathion/dursban @ 2ml/litre water,2 sprays at an interval of 5 days
fertilizer dose-urea @ 2 kg/bigha, ssp @ 4.5 kg/bigha and mop @ 1 kg/bigha