respectively, depending on the tree size. A
surfactant (alkyl polyglycol ether, 20% p/v) was added to
the spray solution at a concentration of 0.05%. In all the
experiments, a concentration of 0 mg l1 was considered as
control. In the fourth year, and to generalize the response, trees
of four peach varieties, ‘Springlady’, ‘Candor’, ‘Sherman’ and
‘Maycrest’, and of five nectarine varieties ‘Zincal 5’, ‘Alginet’,
‘Valencia’, ‘866’ and ‘Sunrise’, were sprayed with 50 mg l1 at
pit hardening. Flower density at full bloom was measured and
the percentage of inhibition with regard to control trees was
recorded.