True
The crop productivity is basically affected by pests mainly weeds, pathogens and animals. According to a research by E.-C. OERKE, the potential loss to wheat and cotton crop was 50 % and 80 % respectively. 25-30 % of soya bean is lost every year due to pest attack. Out of all pests the most dangerous is the animal which as per an estimate has high potential of destroying the crops up to 34% while pathogens can destroy 16-18 % of crops.