Question: query regarding management of ganoderma wilt in arecanut. 
Answer: remove the heavily affected plants from the field and then in the pit apply 200-300 gram lime powder. spray and apply hexaconazole 10ml/liter of water or copper oxychloride 3 gram/liter of water 3 times at 10 days interval in the affected plant portion near the root portion. after completion of this apply the recommended doses of fertilizer- urea 200 gram, super 240 gram, potash-280 gram, borax 25 gram and dry cowdung 10 kg per plant in 2 equal split dose once in the month of march/april and other in the month september/october .