The Influence of Commercial Film-Forming Polymers on Reducing Salt Spray Injury in Evergreen Oak ( Quercus ilexL.) and Laurel (Prunus laurocerasus L.)

Abstract

A field trial was undertaken to determine the influence of four commercially available film-forming polymers (Bond [alkyl phenyl hydroxyl polyoxyethylene], Newman Crop Spray 11E™ [paraffinic oil], Nu-Film P [poly-1-p menthene], and Spray Gard [di-1-p menthene]) on reducing salt spray injury on two woody species, evergreen oak (Quercus ilex L.) and laurel (Prunus laurocerasus L.). Irrespective of species, the film-forming polymers Nu-Film-P and Spay Gard did not provide any significant degree of protection against salt spray damage irrespective of concentration (1% or 2%) applied as measured by leaf chlorophyll concentrations, photosynthetic efficiency, visual leaf necrosis, foliar sodium and chloride content, and growth (height, leaf area). The film-forming polymer Newman Crop Spray 11E™ provided only 1-week protection against salt spray injury. The film-forming polymer Bond provided a significant (P < 0.05) degree of protection against salt spray injury 3 months after application as manifest by higher leaf chlorophyll content, photosynthetic efficiency, height and leaf area, and lower visual leaf necrosis and foliar Na and Cl content compared with nontreated controls. In conclusion, results indicate that application of a suitable film-forming polymer can provide a significant degree of protection of up to 3 months against salt spray injury in evergreen oak and laurel. Results also indicate that when applied at 1% or 2% solutions, no problems associated with phytotoxicity and rapid degradation on the leaf surface exist.

Rainfastness of Poly(vinyl alcohol) Deposits on Vicia faba Leaf Surfaces: From Laboratory-Scale Washing to Simulated Rain

“…The chemistry of Nu Film is based on polymeric terpenesnaturally occurring organic molecules and polymers and their derivativeswhich are film forming. Polymers that form films after application are common, and this seems to be the mode of action for much of the adjuvancy exhibited by polymeric formulations. , …”

“…Polymers that form films after application are common, and this seems to be the mode of action for much of the adjuvancy exhibited by polymeric formulations. 31,32 Many studies have examined the retention of liquid formulations as they impact a leaf surface or as a liquid droplet on the surface. 33−36 Prior work has also provided several methods for determining the impact of simulated rain on pesticide deposits, such as copper-based fungicides.…”