RELATIONSHIP BETWEEN VEGETATIVE FLUSHING AND FLOWERING OF MACADAMIA

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  • 1 University of Hawaii, Hawaii Agricultural Experiment Station, 461 W. Lanikaula St., Hilo, HI 96720

To study the vegetative flushing pattern of M. integrifolia (cvs. Keaau, Kau and Kakea) trees in Hawaii and determine when these vegetative flushes flower, trees were monitored for an entire year (1988), and shoots from these flushes were monitored for flowering during the 1988-89, 1989-90 and 1990-91 flowering seasons. Flushing occurred year-round but was most frequent during the spring-summer and fall months which coincided with the end of the flowering season and the period of fruit maturation. For all cultivars, sporadic flowering occurred in 1988-89 on shoots that were less than one year-old but was not always associated with the oldest shoots. Flowering in 1989-90 and 1990-91 was observed on a larger proportion of the shoots and occurred on shoots that had emerged throughout 1988. Flowering was most abundant on two year-old shoots (1990-91) and could occur on shoots that had flowered in the previous season (1989-90).

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