Search Results

You are looking at 91 - 100 of 1,800 items for :

  • foliar application x
  • Refine by Access: All x
Clear All
Free access

G.R. Stino, A.E. Abou Aziz, A.A. Elezaby, and E.A. Abd Elmoneim

Valencia orange trees [Citrus sinensis (L.) Osb.], budded on sour orange (C. aurantium) rootstock, were sprayed with four different potassium salts during 1995 and 1996. Twenty 5-year-old trees were sprayed once per month with one of the following material. K0: distilled water, K1: potassium green (a compound of different potassium salts, 35% K2O), K2: potassium nitrate (35% K2O), K3: potassium citrate (35% K2O), or K4: potassium sulfate (51% K2O). The vegetative growth occurred in three distinct successive cycles, i.e., spring, summer, and autumn. These cycles differed in time of commencement, duration and termination with respect to season. All potassium treatments significantly increased the shoot length and number of leaves/shoot for the three growth cycles. However, potassium green was superior overall other treatments. Percentage of leaf miner infestation was reduced at all potassium treatments. Potassium applications significantly increased leaf contents of N, P, K and decreased Ca and Mg levels.

Free access

A.M. Akl, A.M. Wassel, F.F. Ahmed, and M.A. Abdel Hady

This study was performed during the 1991, 1992, and 1993 seasons to study the effect of different concentrations and number of sprays urea and/or boric acid on behavior of buds, vegetative growth, and vine nutritional status of Red Roomy grape vines. Two, three, four, or five sprays for both urea at 0.5%, 1.0%, or 1.5% and/or boric acid at 0.1%, 0.2%, 0.3% in addition to the control treatments were applied. A gradual increase was observed in the percentages of burst and fruiting buds, main branch length, leaf area, cane thickness, total chlorophyll, and total carbohydrates in the leaves and considerable depression was observed in the percentages of dormant and vegetative buds. The most pronounced effect on growth and nutritional status was detected on vines sprayed four times with urea at 1.0% plus boric acid at 0 2% during the growing season.

Free access

Lenny Wells, Jason Brock, and Tim Brenneman

regarding the effect of foliar urea sprays on pecan production. The objectives of this study were to investigate the effects of foliar application of elemental S and urea on pecan leaf tissue N and S concentration, pecan nut quality, LCI, and pecan scab

Full access

Xunzhong Zhang, Mike Goatley, Jamie Conner, Megan Wilkins, Inna Teshler, Jun Liu, Michael Fefer, and Wenzi Ckurshumova

-0075 solution was made by mixing 0.1% Cu-Chl with 0.5% synthetic paraffinic oil and 0.04% emulsifier in distilled water. The treatments included 1) well-watered control, 2) drought control, 3) B18-0074 applied as soil drench plus foliar application, 4) B18

Full access

Augusto Ramírez-Godoy, María del Pilar Vera-Hoyos, Natalia Jiménez-Beltrán, and Hermann Restrepo-Díaz

., 2016 ). In this context, foliar Si applications increased the mortality of tobacco whitefly nymphs on cucumber ( Cucumis sativus ) ( Correa et al., 2005 ). Soil fertilization with calcium (Ca) or potassium silicate favored resistance to arthropods in

Free access

M. Lenny Wells, Patrick J. Conner, J. Frank Funderburk, and Jacob G. Price

Foliar boron (B) applications have been observed to promote flowering, fruit set, and yield in a variety of perennial tree crops ( Batjer and Thompson, 1949 ; Hanson et al., 1985 ; Nyomora et al., 1999 ; Stephenson and Gallagher, 1987

Full access

Janet C. Cole, Robert O. Brown, and Mark E. Payton

shoot length, stem dry weight, leaf area, and inflorescence dry weight of florists’ hydrangea [ Hydrangea macrophylla ( Bailey, 1989 )]. The objective of this research was to determine whether foliar or substrate surface applications of ancymidol or

Full access

Justin M. Vitullo and Clifford S. Sadof

of floral scents, flowers are even more preferred by beetles than foliage ( Held and Potter, 2004 ). Due to the long flight period of adult beetles (usually >8 weeks), multiple foliar applications of persistent insecticides like carbaryl are typically

Full access

Esmaeil Fallahi and Thomas Eichert

Deciduous tree fruit yield and quality will suffer in response to insufficiency of any mineral nutrient and foliar applications of some elements, including nitrogen (N), calcium, potassium (K), and boron (B), that are closely tied to fruit quality

Free access

Imed E. Dami, Shouxin Li, Patricia A. Bowen, Carl P. Bogdanoff, Krista C. Shellie, and Jim Willwerth

application ( Poling, 2008 ). Passive methods include site and cultivar selection ( Zabadal et al., 2007 ) and the application of chemical protectants ( Dami and Beam, 2004 ). Among the chemical protectants, foliar applications of the plant growth regulator