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A COMPARISON OF THE EFFECT OF CHEMICAL BRUSH-CONTROL TECHNIQUES ON PLANT COVER

A LARGE SCALE TEST OF COMMON BRUSH-CONTROL TECHNIQUES WAS BEGUN ON A 3-MILE SECTION OF A RIGHT-OF-WAY IN CENTRAL PENNSYLVANIA IN THE SPRING OF 1953. THE COMMONLY USED CONTROL TECHNIQUES EMPLOYED IN THIS TEST WERE A BROADCAST FILIAGE SPRAY OF 2,4-D + 2,4,5-T (B), AN OIL-WATER SEMIBASAL SPRAY OF 2,4-D + 2,4,5-T (C), A SUMMER BASAL SPRAY OF 2,4-D + 2,4,5-T (D), A WINTER BASAL SPRAY OF 2,4,5-T (E), AND A BROADCAST FOILAGE SPRAY OF AMMATE (F). IN ADDITION TO THESE ORIGINAL TREATMENTS, ONE-HALF OF EACH OF THE FOUR REPLICATIONS OF TREATMENTS B, C, D, AND F WERE GIVEN A SUMMER BASAL SPRAY ONE YEAR AFTER THE ORIGINAL SPRAY APPLICATIONS. AS A CONTROL FOR THE TEST, ONE SET OF FOUR REPLICATIONS WAS LEFT UNSPRAYED. BECAUSE OF A THOROUGH AND EFFICIENT APPLICATION OF THE SPRAY, ALL TECHNIQUES GAVE AN ADEQUATE TOP KILL THAT VARIED FROM 94.1 TO 99.7 PERCENT OF THE TOTAL NUMBER OF STEMS. WHEN THE RESURGE OF WOODY BRUSH THAT FOLLOWED THE INITIAL SPRAYING WAS COMPARED THREE GROWING SEASONS AFTER SPRAYING, THE OIL-WATER, THE SUMMER BASAL, AND THE AMMATE SPRAY TECHNIQUES WERE THE MOST EFFECTIVE IN KEEPING WOODY BRUSH UNDER CONTROL. CERTAIN PLANT SPECIES WERE NOT WELL CONTROLLED BY SPECIFIC TECHNIQUES AND ACCOUNTED FOR THE BULK OF THE RESURGE ON THE PARTICULAR TREATMENTS. ALTHOUGH NO ONE SPRAY TECHNIQUE CAN BE SAID TO BE THE BEST UNDER ALL CONDITIONS, THE BASAL SPRAYS OFFER THE BEST OPPORTUNITY FOR CONTROLLING WOODY BRUSH WHILE AT THE SAME TIME MAINTAINING AN ATTRACTIVE ROADSIDE APPEARANCE. HOWEVER, WHERE THE BRUSH IS VERY DENSE, SUCH AS IT OFTEN IS AFTER REPEATED HAND CUTTING, A BROADCAST TYPE OF SPRAY MAY BE THE MORE EFFICIENT TREATMENT, WITH A BASAL FOLLOWUP USED TO COMPLETE THE INITIAL CONTROL PROGRAM. /AUTHOR/

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  • Supplemental Notes:
    • No 419, pp 11-18, 4 TAB, 4 REF. 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:
    • Bramble, W C
  • Publication Date: 1956

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  • Accession Number: 00205083
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 22 1971 12:00AM