Search Results
Abstract
Gibberellic acid (GA), when applied to peaches from early August to early September at 200 ppm, resulted in flower thinning, bloom delay, and increased hardiness near bloom. Early August treatments were more effective than earlier or later applications. A morphological study of buds after treatment indicated that GA: delayed flower initiation, delayed development after initiation, resulted in smaller buds, and delayed microsporogenesis.
Abstract
Alar applied at the rate of 4000 ppm to ‘Delicious’ apple trees in the fall delayed bloom the following spring four to five days and increased fruit set. At harvest, the fruits were smaller, less elongated, had more advanced ground color and expressible juice. Fruit diameter, over color, flesh color, soluble solids, and respiration rate were not affected.
Abstract
Six stages of floral development were identified and related to air temperature in Carya illinoensis (Wang.) K. Koch, cv. Western. Initiation (the first microscopically visible evidence of floral primordia) was detected on April 4, 1973, after an accumulation of 537 heat units. On April 10 a total of 598 heat units were accumulated when 93% of the buds sampled had initiated pistillate flowers. Floral development occurred normally, uniformly, and in concert with the heat units accumulated.