Abstract
Dead spur, a disorder of Delicious apple trees, is characterized by weak, dying, and dead fruit spurs on limbs 3 yr old and older. An autumn application of an endogenous ethylene inhibitor, aminoethoxyvinylglycine (AVG), as a foliar spray or as an injection into the trunk caused remission of dead spur symptoms. Most fruit spurs on treated trees regained productiveness compared to controls. Repeat application helped to maintain spur viability
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