questions: asking about the leaf curling of assam lemon 
 answers: told him to apply dursban @ 2ml/ l of water, 3 spray at 5 days interval ( insecticide).
mahaphal @ 1-2ml/ 5 l of water, 2 spray at 15 days interval ( vitamin for fruit production).
vigoro ( citrus and avocado plant food ) @ 2 unit / 5 l of water, 2 spray at 15 days interval ( improves stress tolerance and disease resistance)