(a) The three important preventive measures for pest control are:
(i) Employing crop rotation.
(ii) Use of pest-resistant varieties.
(iii) Employing optimum time of sowing the crops.
(b) Preventive and control measures are used before grains are stored for future use, which include strict cleaning of the produce before storage, proper drying of the produce first in sunlight and then in shade, and fumigations by using chemicals that kill pests.
