Abstract
By the year 2000, there may be over 6 billion people in the world. Unless it is controlled, urban development will increasingly overrun more of what we consider today to be our best agricultural land. The world population will only be able to feed itself in the future if man has the ability to drive a maximum yield from crop plants and animals produced on limited land resources (Mc-Kelvey 1969) and reduce the human population increase. Future demands for space, food, and fiber, combined with the concern for environmental quality, will impose new constraints on pest control specialists. Nickel (1973), however, stated that intensification of land use in most areas of the world may result in a depletion of soil fertility, soil erosion, deterioration of soil physical properties, uncontrolled weed growth, and increased pest insect and disease problems.
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