IT LOOKED LIKE ANOTHER BUMPER CROP OF APPLES THIS YEAR. I expect apples to...
IT LOOKED LIKE ANOTHER BUMPER CROP OF APPLES THIS YEAR. I expect apples to drop early in the season, but all but a few fell from the tree. Birds plus the wind caused some to drop, but nearly all were lost. Was it too wet?
Aminoaminoethoxyvinylglycine (AVG, ReTain®) and 1-naphthaleneacetic acid (NAA) are several plant growth regulators that are commonly applied to apples to minimize pre-harvest drop. AVG retards maturity and thus fruit drop by inhibiting ethylene production. NAA decreases abscission of the fruit stem from the bud but can advance maturity after repeated applications. The following site has more information on pre-harvest fruit drop.