Page:The food of the Gods - A Popular Account of Cocoa.djvu/64

Rh now being made on some estates to grow rubber as a shade tree. In recent clearings in Samoa, trees are left standing at intervals to serve this end.

In Grenada, British West Indies, and some other districts, shade is entirely dispensed with, and the trees are planted at about eight feet centres, thus forming a denser foliage. By this means at least 500 trees will be raised on an acre, against less than 300 in Trinidad, the result showing almost invariably a larger output from the Grenada estates. This practice is better suited to steep hillside plantations than to those in open valleys or on the plains.

The cacao leaves, at first a tender yellowish-brown, ultimately turn to a bright green, and attain a considerable size, often fourteen to eighteen inches in length, sometimes even larger. The tree is subject to scale insects, which attack the leaf, also to grubs, which quickly rot the limbs and trunks, this last being at one time a very serious pest in Ceylon. If left to Nature the trees are quickly covered with lichen, moss, "vines," ferns, and