Biology, 30.10.2019 09:31 1846252

Farmers sprayed leechi trees to suppress populations of scale insects. this also killed the populations of a predatory lacewing that controlled the numbers of scales. soon the spraying did no good, and the damage to the leechi from the scales was greater than before spraying had occurred. few predatory lacewings exist in the trees now because

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Farmers sprayed leechi trees to suppress populations of scale insects. this also killed the populati...