The highest pesticide used crop in India is

Solution(By Examveda Team)

The highest pesticide used crop in India is Cotton.
Cotton crop is the largest consumer of pesticides in India, genetically modified Bt cotton seed was introduced in 2002-03 specifically to reduce its consumption. With only 5 percent of gross cropped area, cotton reportedly consumes 36 - 50 percent of total pesticides.
It is widely accepted and Bureau of Industrial Costs and Prices (BICP)'s analysis also confirms that cotton and rice are the major pesticide using crops in India.