Vol. 15—1961 - NorthEastern Weed Science Society

WEEDGONTROLIN SWBE:rCORNWITHDACTHAL,TRIAZINES, DNBF. AND
THIOLCARBAMATES
M.F. Trevett and William Gardne~
INTRODUCTION
191.
This paper isa report on the effectiveness of the herbicides
listed in Table. 1 in controlling annual broadleaf weeds in
sweet corn. Annual grasses were not present in sufficient amount
to permit reliable evaluation of control.
Procedure
Carmel Cross sweet corn was planted
June 7, 1960, one to two
inches deep in a sandy loam soil. Treatments were replicated
five times in randomized blocks of single row treated plots paired
with untreated plots. Sprays were applied with one pass of a
small plot sprayer, at 40 pounds pressure and 50 gallons per acre
volume. Granular mat~rials were applied by hand. All plots were
cultivated throughout the saason, but during cultivation the soil
was not disturbed six inches an either side of the crop row. Corn
was harvested at the soft dough stage of maturity.
. The principal broadleaf weeds were: Black mustard (Brassica
nigra Koch.), Red-root pigweed (Amaranthus retroflexus L.), and
Lambsquarters (Chenopodium album L.). Broadleaf weods averaged
45.7 per square foot In untreated plots. The annual grass present
was: Barnyard grass (Echinochloa crusgalll Beauv~).
.
Rainfall data are in Table 2 •
Results
A. Diuron,
Plaritingappli~ationsof 2 pounds of Simazine, 2 pounds of
Atrazine, and 2, 3, Qr 4 pounds qf Trietazine produced significantly
higher yields of sweet corn than plantingapplicatlons of
0.6 or 1.2,pound$ of Diuron, and 4, 6, or 8 pounds ot Dacthsl and
emergenceapp11oat1on at 6 pounds of Falone or all"combinations of
DNBPplUS Dalapon, Table 3•. Felone and DNBP-Dalapon combinations
injured corn moderately to severely.'
II Associate Agronomist and Technical Assistant, Agronomy Department,
University of MQine, Orano, Maine.