questions: query about viral disease. 
 answers: 1. in potato spray rogor @ 2ml/litre of water for 3 times at 5 days interval.
2. dose of tracel: 2m/litre of water for 2 times at 15 days interval.
3. dose of humic acid: 2-3ml/litre of water. can be sprayed in all horticultural crops, vegetables, grains, pulses, oilseeds, fruits and flowers.