Vol. 16—1962 - NorthEastern Weed Science Society

Weeding of Carrots With 'pre-lilanUng, Pre ..emergence and
Po.t-emerget!ceApplicatlonl ·of Chemicals
Ch~r1e. J. No11 1
Weedcontrol hvery impbl''tant iii the early It ••• S of growth of carrot ••
Moat coaaercia1 cropa of carrota.ate' aprayed for ".14control with Stoddar.d
Solvent. Other chemical. have without recent years benn found to be effective.
This year's work is a contin~tion of work .tarted a number of year.:
ago.
PROCEDURE
The seedbed was prepared, pre.p1anting treaauent. applied and .eed.
planted Kay 2. Pre-planting treatments were incprporated in the .011 with
e rototiller .et shallow. The variety grown was Chantenay, red core. The
pr.,:,,8IIIergenceapplications were made 1 or 3 days after seeding and post- '.
emergence applications were made 33 day. after seeding when carrots had .
their first true leaves. Individual plots were 28 f.et long and 2 feet
wide. Treatments were randomized in each of 8 block ••
The cheatca1s were applied with • small sprayer over the row for a wiath
of 12 inche.. Cultivation controlled the weed. between the rows. Anest.:L".
mat. of wee.~contro1 was made July 28 ona basis of 1 to 10, 1 being mo.t
des~r.b1e and 10 being least deillr8ble. Carrotharve.t was completed Oct. 6.
RESULTS
. The results are presented in table 1. All treatment. except the po.t~
emergence Deetb.1' treatment significantly increa.ed weed control as compared
to the untreated check. The belt veed control tre8llleDts were in the so11 iilcorporation
treatments of Ti11am at·~ 1bs. per acre, in the pre~emergence
treatments 0.£.PrOllletryne at 3 1bs. per acre, Ipal1ne at 3 1bs. per acre,
U 4513 at 3 lb •• per acre and Amiben at 5 1bs. per acre and in the postemergence
treatment of Solan at 6 lb •• per acre. The stand of plants was
significantly better than that of the untreated check with the post-emerg8ace
treabaent. of Amiben at S 1bs. per acre aad Solan at'6 lb •• per acre. Many
other chemicals had a .tand equal to the check. Significant increasea in
yield as compared to the untreated plot were found in the following treated
plots: in the .oi1 incorporation treatment R-1856 at 4 and 6 1bs. per acre;
in the pre-emergence treatments of Herb. 326 at 2 1bs. per acre, U 4513 at
2 1be. per acre, zytron at 10 and 15 1bs. per acre, Amibenat 5 lbe. per acre
and Dactha1 W-50 at 8 lbs. per acra; and in the post-emergence treatment of
Amiben at 5 1bs. per acre and Solan at 4 and 6 lbe. per acre.
CQ,NCLUSION
Taking into coaa1derat10n weed control, stand of plante and yield the
best two treatments were the post-emergence treatments of Solan at 6 1be. per
acre and Amibenat 5 lbs. per acre. Other chem1cale that look promising for
the weeding of this crop are R~1856, Herb. 326, U 4513, Zytron and Dactha1.
99
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