REDUCTION OF SALT BUILDUP AND TWIG INJURY IN ROADSIDE PEACH TREES WITH FILM-FORMING SPRAYS

Peach trees located along a major highway were sprayed in November 1987 with five film-forming products (Folicote, RD 1725, RD 1726, Rhodorsil, and Joncryl 1938). There were also two control (unsprayed and burlap-covered) treatments. By spring 1988, burlapped twigs accumulated the least chloride (0.29% by dry weight of twig tissue) and twigs were least injured (5.3 cm dieback). In contrast, unsprayed twigs accumulated the most chloride (1.79%) and were the most injured (139 cm dieback). Corresponding data for spray-treated twigs were intermediate, indicating small-to-moderate beneficial influence of most products, especially RD 1726 (1.39% chloride ion; 8.7 cm dieback) and Joncryl 1938 (1.24% chloride ion; 7.4 cm dieback). Burlapped and unsprayed twigs contained 0.08 and 0.31% sodium, respectively, and all spray-treated twigs between 0.30 and 0.36% sodium. In another study, peach trees were sprayed with Folicote, RD 1725, and four other emulsion-based formulations (RD 2033, RD 2034, RD 2035, and RD 2036); half of each tree was sprayed several times during the winter with a 2% rock salt solution. Twigs treated with RD 2034 showed the least injury and accumulated moderately less salt than the control twigs from both salted and nonsalted sides of trees. All other treatments were ineffective, and in fact twigs treated with RD 2034 accumulated more salt than the control and had the greatest injury. Scanning electron and light microscopy revealed progrssive deterioration in the surface integrity of Folicote, RD 1725, RD 2033, RD 2034, RD 2035, and RD 2036 during the winter. RD 2033 deteriorated the least and RD 2034 the most.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1990/1279/1279-005.pdf
• Record URL:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1279, Hydrology and Environmental Design 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Chong, Calvin
  • Lumis, Glen P
• Publication Date: 1990

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 45-53
• Monograph Title: Hydrology and environmental design
• Serial:
  • Transportation Research Record
  • Issue Number: 1279
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Prevention; Roadside; Sprays (Materials); Trees
• Old TRIS Terms: Salt buildup
• Subject Areas: Highways; Maintenance and Preservation; Security and Emergencies; I62: Winter Maintenance;

Filing Info

• Accession Number: 00605565
• Record Type: Publication
• ISBN: 0309050650
• Files: TRIS, TRB
• Created Date: Mar 31 1991 12:00AM