![]() The disease is believed to be due to the secretion by the insect of anon-living but toxic principle that is variably diffusible, sometimes affecting only the area of leaf on which the mealybugs feed, and sometimes producing wilt in two or three contiguous leaves, or, as is usually the case in the field, a wilted condition of the whole plant. ![]() Slow wilt is the result of a continuous attack by a gradually increasing population, its incidence being governed by the size of the colony and the length of time it feeds on the plant. Quick wilt develops after a sudden attack by a fairly large colony of mealybugs, which may, however, feed for only a short time. Wilt of pineapple caused by Pseudococcus brevipes, Ckll., which is the most serious cause of destruction of these fruits in Hawaii, assumes various forms.
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