Abstract

SummaryExperiments with flowers of Cox’s Orange Pippin apples have shown that semi- compatible pollen tubes produced by self-pollination may effect fertilization and therefore fruit set. Pseudocompatibility was maximized by pollinating old flowers with large quantities of pollen, and maintaining a temperature of about 20°C during the period of pollen tube growth. The evidence suggests that, with some or all of the above conditions, fertile flowers are able to set fruit with self-pollination.

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