Biological factors in agricultural pest means that cause damage to plants, and causes the output of crops decreased. Significant pests include Insect pests, plant diseases, weeds and other enemies such as birds, mice, squirrels, crabs, snails,
.Pest control is one of the important problems that farmers because more than 30 percent of the crops of the world ต้องลดลง due to destruction and disturbance of pests
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