Everglades Station Mimeo Report EES65-9 October, 1964
 1
 PREEMERGENCE HERBICIDE SCREENING IN SUGARCANE ON SAND SOIL

 J. R. Orsenigo/


Summary: Preemergence herbicides were evaluated f \theirdfect
 on C.P. 50-28 plant cane and on weeds at sanvoil
locations. Certain herbicides visibly affected 'cane stand and row, par
cularly after rainfall was sufficient to move the herbicides into the,
zone. The substituted uracils (bromacil and isocil) were most harnf ny
chemicals effective against annual weeds caused reduced 'cane growth. Lack
of uniformity of rainfall during early stages of these trials may have affected
both crop and weed responses.

 Many individual treatments maintained acceptable or better annual weed
control while a few chemicals effectively reduced bermudagrass populations.
Encap petroleum mulch apparently increased 'cane tolerance to atrazine,
diuron and fenac.

 Few treatments demonstrated acceptable tolerance and effective annual
weed control. Herbicides with the greatest promise at one or both locations
included: amiben, atrazine, dicamba, diuron, fenac, norea, propazine and
simazine. (Underlined chemicals are cleared for sugarcane).

----------------------------------mm --mmmmmmmmmmmmmmmmmmmm-m------mmmmmmmmmmm

Name of experiment: Primary evaluation of preemergence herbicides in sugar-
 cane on said soil (692-43-64)
Location: P* Tom Perry Ranch, Moore Haven

Soil: Sand.

Design: Randomized complete block with 2 replications. Plots
 were 3 rows (15 ft) wide by 75 ft long.

 Description of crop: The variety C.P. 50-28 was not emerging at the time of
 herbicide application.

 Description of weed population: Lack of rainfall reduced the density of the
 weeds to a level lower than that desirable for evalua-
 tion purposes. The principal grass weeds. ,ere: bermudagrass,Cynodon dactlyon:
 and foxtail, Setaria sp. Ragweed, Ambrosia sp., was the major broadleaf weed-
 while mixed infestations of the following occurred throughout the plot area:
 bedstraw, Bishop's Hocd, Dichondra and purslane.


 SThis tabulation was prepared for herbicide researchers and the industry.
 The data herein neither constitute nor imply recommendation of any herbi-
 cide for any usage.
 SAssociate Horticulturist, University of Florida, Everglades Experiment
 Station, Belle Glade, Florida.