Question: asking about the nematode infestation in banana plant
Answer: pre-treat the suckers with 40 g carbofuran 3g. if pre-treatment is not done, apply 40 g of carbofuran ( furadon) around each plant one month after planting (refer selection and pre-treatment for alternate technology) or pare and dip the corm in 0.75% monocrotophos solution, shade dry and plant. 
or apply furadon @ 2gm / l of water , 3 spray at 5 days interval