Disease and their control
The disease mainly occurs during rainy season when night temperature is between 20-22°C and day temperature is between 25-28°C. The symptoms are water soaked circular lesions are seen which become yellow or dark purple color when dried.
Use of Dithane M-45 @400-500 gm/acre in 100-150 ltr water should be applied at the interval of 7-14 days to get cure form leaf blight.
Dasheen Mosaic Virus (DMV)
It is a viral disease which is carried out by aphids. The symptoms are seen more in cooler months and the symptoms are veinal mosaic and dispersed pattern seen on the foliar leaves. Treatment: Different varieties of arvi crops should be grown to avoid Dasheen Mosaic Virus.
It is a viral disease caused by bacilli form virus. The symptoms are crinkled and conspicuous feathery mosaic on young leaves.
Rouging is one of the methods to prevent from this virus or resistant varieties should be grown to get rid from Alomae/Bobone Virus.
Pythium rot or corm rot
The symptoms are stunted growth, shortened leaf stalks, curled and crinkled leaf blades and yellowish and spotted leaves.
Use of Captan 50WP @44-45 kg/acre is used to treat corm rot.
Pest and their control
The pests attack the seed corms which will result in poor seed production.
Use of Malathion 50EC @250 ml/acre will help to control insect pests.
Harvesting is mainly done after 175-200 days of sowing i.e. when leaves become yellow in color. To obtain soft corms, early harvesting should be done. Proper moisture in the fields is necessary for easy harvesting of corms. Harvesting of corms is done with the help of spade or other hand tools. After harvesting, corms are cleaned and then grading should be done.
Secondary corms are stored in cool and dry place for seed production purpose. By storing in cool and dry places it will help to protect corms from rotting. It can also be stored in cold storages or in pits.