Some investigations on coco-nut diseases associated with soil conditions in New Guinea. (continued.)

Abstract

Some physiological derangements of mature coconut palms, particularly from those plantations situated on the deltaic and estuarine deposits on certain areas of the New Guinea mainland, are described, together with the contributory causes. These occurrences are compared with similar diseases recorded from other countries. The chemical and physiological changes, especially as regards moisture requirements and potash movements, which occur on coco-nut palms at various stages of growth are indicated and discussed in relation to the diseases described. An account of several other diseases and derangements of coco-nut palms, associated with unfavorable soil,
moisture and nutritional relationships, are also discussed. The employment of proper cultural methods in the control of coco-nut diseases, especially those of physiological origin, is indicated.