الفهرس 
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Abstract
The present work has been planned to investigate the effect of a 20%urea spray (as leaf defoliant) applied on 6-year old trees of guava (Montakhab Faqous cv.) at the frist day of Nov. Dec.Jan.Feb. and March Responses of guava trees to all mentioned treatments (dates of application )were studied i.e. the effect of defolaiant on tree growth percentage of seting fruits, yield and fruit quality , in addition, days passed from defoliant application up to emmergence of leaves, flowering and date of fruit ripening, The percentage of increments in treated shoots and date of harvesting were also considered. The results would help to improve fruit quality, early or late cropping. shortening the harvest duration period and increase of tree productivity.