Abstract

Abstract Gibberellins (GA) will stimulate parthenocarpic fruit development in apples (1, 4, 5, 9). Davison (4) found GA3 to increase fruit set in the Red Jersey variety to a greater extent than in Sturmer. Bukovac (1) observed that GA4 was more effective than GA3 in promoting fruit set in the Sops-of-Wine variety. Varga (9) reported that GA1, GA2, GA4, and GA7 promoted parthenocarpic fruit set in the Lombartscal-ville variety but not in the Winston or Golden Delicious varieties.

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