scholarly journals Chemical regulation of sex expression in certain olive cultivars

2013 ◽  
Vol 35 (2) ◽  
pp. 185-190 ◽  
Author(s):  
E. S. Hegazi ◽  
G. R. Stino

The modifying effect of growth regulators on bud burst, flower bud formation and sex expression in olives varies greatly according to cultivar, concentration and time of application. Cycocel 200, 500 mg/l, ethephon 200 mg/l and SADH 2000 mg/l stimulated bud burst and flower bud formation in the 'Blanquetta' cv. A noticeable increase in the percentage of perfect flowers was obtained by 100 mg/l of kinetin, and 200 mg/l of Cycocel in the cv. 'Picual', Ethephon 200/1, Cycocel 200 mg/l and SADH 2000 mg/l considerably increased the percentage of perfect flowers in the cvs 'Blanquetta', 'Serrana' and 'Picual'. Treatments at green cluster stage were not effective.

HortScience ◽  
2001 ◽  
Vol 36 (7) ◽  
pp. 1292-1295 ◽  
Author(s):  
Duane W. Greene

A range of concentrations and timings of CPPU application were evaluated in attempt to identify situations in which fruit size, flesh firmness, and soluble solids could be increased while minimizing increased incidence of fruit asymmetry and reductions in flower bud formation and fruit surface red color on 'McIntosh' apples (Malus×domestica Borkh.). The greatest response to CPPU for most attributes evaluated occurred when it was applied at fruit size between 6 mm and 16 mm. The conclusion from this series of experiments is that differential response to CPPU could not be established by altering the time of application. The response to CPPU is linear with increasing concentration. Results suggested that use of 4 to 6 mg·L-1 CPPU on apples to increase fruit size was the maximum and appropriate range to use without causing fruit asymmetry. Chemical name used: N-(2-chloro-4-pyridyl)-N′-phenyl urea (CPPU)


1993 ◽  
Vol 67 (2) ◽  
pp. 160-164
Author(s):  
Junichi UEDA ◽  
Kiyotaka OKADA ◽  
Masako K.KOMAKI ◽  
Jiro KATO ◽  
Yoshiro SHIMURA

2013 ◽  
Vol 36 (1-2) ◽  
pp. 83-94 ◽  
Author(s):  
Franciszka Jaumień

The growth of trees sprayed in spring with chlormequat is weaker, and their elongation growth ends 2 - 3 weeks earlier than that of unsprayed trees. Trees with growth inhibited by chlormequat set flower buds on the spurs and in the subapical part of long shoots. The course of flower bud differentiation starts in the second half of July and is similar to that in the apple tree.


2005 ◽  
Vol 4 (3) ◽  
pp. 335-338 ◽  
Author(s):  
Jinyin Wang ◽  
Osamu Arakawa ◽  
Takenori Asada

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