The present study was conducted during 2017 and 2018 seasons on “Washington” navel orange
trees to provide orange growers, with safe treatments that are applicable on field scale to reduce or prevent the
incidence of rind creasing and to strengthen the structure of the albedo tissues by using calcium, molybdenum, or
an anti-ethylene compound (AVG). The results of the present study indicated that ammonium molybdate (at 100
ppm) reduced creasing percentage. Moreover, the combination of AVG (at 50 ppm) plus ammonium molybdate
(at 100 ppm) reduced creasing percentage, rind thickness and rind EC percentage. Moreover, enhanced rind and
juice nutrient contents especially molybdenum and sulfur elements.