Abstract

The annual rhythm of cambial activity in guava tree, Psidium guajava Linn., was investigated. The period of cambial activity is very long. It begins in early February and ends in November. The most conspicuous stage of cambial activity is seen to be in early June. When the temperature gradually rises the cambial activity increases. But it slows down as the average temperature exceeds 28 ℃. The foliar buds burst after the beginning of the cambial activity. The relation between the flowering period and the cambial activity shows less correlation.