Everglades Station Uimeo Report 60-18 1 May 1960

 RESUME OF RECENT HERBICIDE RESEARCH ON ORGANIC SO"IL 1' o 90 .-
 J. R. Orsenigo


 This brief report summarizes information from recent herbicide trials on
organic soil. Some of the data have been presented before the regional and
national weed conferences while other data will be published in ex-enso in the
future. Specific details pertaining to these experiments will be provided on
request. Treatments discussed herein are not implied as recormendat-ions for
any herbicide for any usage. Herbicidal chemicals should not be utilized in
any manner contrary to label recommendations or current limitations of the USDA
and FDA.

Celery Herbicides

 Post transplanting (but prior to weed emergence)
 Combinations of Vegadex and Randox: Vegadex and Randox
 applied alone or in combination with each other had no significant influence
 upon number or length of petioles or weight of fresh-trimmed plants or yield of
 52-70H. Randox and its combinations provided grass control superior to Vegadex.
 Randox is not currently cleared for use on celery. Yield data are given in
 Table 1.

 Table 1. Celery yield in crates per acre for Vegadex, Randox
 and combination treatments. (Rates are quarts of product per
 sprayed acre)

 Herbicidal treatment Crates/acre
 Cultivated check 733

 Randox, 4 qts. 738
 5 qts. 714
 6 qts. 693

 Vegadex, 4 qts. 710
 5 qts. 711
 6 qts. 777

 Randox 2 qts. + Vegadex 2 qts. 695
 Randox 2 qts. + Vegadex 3 qts. 745
 Randox 3 qts. + Vegadex 2 qts. 730
 Randox 3 qts. + Vegadex 3 qts. 750

 Repeat applications of VegadeX and Randox: Vegadex, Randox and
 hand-weeded plots were installed immediately following transplanting. The same
 treatments were repeated three and four weeks later and reciprocal applications
 were made also. Weed control was best when treatments were repeated at tLree
 weeks after setting and Randox was a better herbicide than Vegadex. Herbic.ide
 tolerance, number and length of petioles, weight of fresh-trimmed plants, ad