AbstractDistribution of the changa is limited to the coast and to the interior river valleys of the Island. Type of soil is the chief factor limiting distribution. A wide variety of host plants are attacked, but a slight preference appears to be shown for certain plants. The main damage results from feeding, which is confined to the roots and stems of plants. The greatest damage occurs when the surface of the soil is wet. Few, if any, important natural enemies of the changa, other than birds, are native to the island, although the introduced giant toad seems to be proving a valuable aid in control. Poisoned baits afford a satisfactory means of control, and other means of chemical control may be employed.
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