Vol. 16—1962 - NorthEastern Weed Science Society

1. Associate Research Specialist in Weed'CO~trol, NewJersey Agricultural
Experiment Station; Head, AgriCUltural Research,
Seabrook Farms Co., Seabrook, New Jersey; and formerly Research
dAAiAT.~nT. in ~~m ~~onR_ RutgP.~R _ the ~tRte TTniversitv. New
THE EFFECTS OF FORMULATIONAND PLANTINGDA'lE :ON THE HERBICIDAL
ACTIVITY OF PROPYL ETHYL-ft-BUTYLTHIOLCARBAMATE
R. D. Ilnicki, T. S. Gill, and T. F. Tisdell
1
147
Within the last several years there has been much interest
in thiolcarbamate herbicides as evidenced by the many orop-weed
situations investigated. To date, there is little or no reoorded
information on the use of propyl ethyl-n-butylthiolearbamate (Tillam)
either as a pre-planting or pre-emergence herbicide for weed
control in spinach. Previous work at this Station and elsewhere
has indicated the effectiveness of this herbicide with little or
no injury to several horticUltural crops. .'Research has shown
that delayed plantings following applications of other thiolcarbamate
analogues will reduce injury to horticultural crops. This
study was initiated to evaluate the effects'on spinaoh and weeds
o't several planting dates fOllowing pre-planting application13 of
several formulations of Tillam.
Materials
and Methods
commeroial propyl ethyl-n-butylthiolcarbamate (Tillam 6E)
and formulations containing two different h¥drocarbon carriers
were the treatments evaluated. A low volatile, seleot paraffin
traction haVing oarbons above ClR~ served as the oarrier in one
blend (EAP 4160) and a somewhat nigher volatile naphthenic fraotion
above C1R was used as a solvent or carrier in the other
(EAP 4161). The two experimental formulations oontained slowbreakiqg
emulsifying systems and were identioal in all other respeots.
The three formulations ot Tillam were ,applied as pre-planting
treatments on August 29 a!t rates ot 3 and 5 pounds per acre
with a knapsaok sprayer oonnected to a boom:'equipped with five
nozzles spaoed 20 inches apart. The applications were made in
water dilutions of 40 gpa to a finely prepared seedbed of a sassafras
sandy loam soil at Seabrook Farms, Seabrook, New Jersey.
Plots were 10 x85 feet. Only 8-1/3 feet of $ach plot width was
sprayed for the entire 85-foot length. The outside borders served
as bufter areas and as checks to allow for any lateral movement of
the treated soil at time of incorporation. Immediately after application,
the treatments were disked into the upper 2-3 inches
with a Meeker harrow in one direction only. Check plots were also
inoluded in addition to the border areas between plots. There
were two replioations of all treatments.