Vol. 16—1962 - NorthEastern Weed Science Society

529
The chemicals were applied May3 •. The day was: clear and windy with 'an
air temperature of 50 0F. The soil was wet and cold.
Injury to the basic grasses was recorded threti'tiJnes throughout tl)e,season
and crabgrass coverage estimates were made on August 11th and September J~th.
C.rabgrass counts were made on September 19th. ',' I "
The chemicals included, the rete of applicati~h, and the companies sOPPlying
the materials are as follows:
1) Triflural1n (N,N-di-n-prOJ'¥l-2,6-dinitro";'4: trifluromethylanilinel
2, 4 S. 6 lb. Eli L11ly Company." . ,if . .
at
2) Dipropal1n (N,N-di-n-propyl ..2,6-dinitro-4'lrnethylaniline) at 2,.4.&
8 lb. Eli Lilly Company.' .[' '. ,~'
3) Diphenatrlle (diphenylaoetonitr11e) at 30 Llb, Eli Lilly Company'Cat
26 lb, Agrico Crabgrass Killer; at 30 lb, International Minerals and Chemical
Company.
4) Dacthal G-l.5 (Dimethyl' ester of tetra
10 S. 15 lb. Diamond Alkali Cheniical Company.
chlbroterephthalic
,,,
acid)l}t5,
;;'
5) Dacthal W-50 (Dimethyl ester of tetra chloroterephthalic acid) at 9.8
(Rid), at 10.8 (Vitogrow) - Swift Chemical Company.
6) Niagara 6370 experimental at 6 lb. Niagara Chemical
Machinery and Chemical Corporation. .
Division, ,Food
7) Bandane E.C. (pOlychlorodicyclopentadiene isomer)
Velsicol Chemical Company. ',1
at 10, 20 S. 30 lb.
8) PEWCF-l08 (Chlordane and polychlorodicyctbpentadiene isomer) at'47
lb. O. M. Scott Company.
9) FEVCF-lll (Chlordane and pol ychlorodicyclbpentadiene isomer) at 57.5
lb. O. M. Scott Company.
10) FEVCF-1l3 (diphenylacetonitrile) 37 lb. O. M. Scott Company.
11) FEWCF-114 (polychlorodicyclopentadiene ·iibmer). O. M. Scott ~ompany.
12) HaltSF-2b (Chlordane) at 59.6 lb. O. M.~co.tt Company. ' .
13) Tricalc!um arsenate (Pur~e) at 355 lb. A~oW Seed Company. .
14) Calcium propyl arsonate (No Crab) at 40 11:>. Amchem. .
15) Zytron (o-(2-4-dichlorophenyl)0-methyl iS~~OPYl-phophoromidoth~~te)
at 15 lb. Dow Chezn.ical Company.... .:, ' .
16) Corenco 106 (DiPhenYlacet..o.nitrile and DiS~ ... 1'1 methyl arsonate.Hex a­
hydrate) at 31.1 and 5.4 l.b respectively. Consolidate Rendering Company.
17) SD 6623 (Tri methyl sulfonium chloride) at 6 b. Shell Oil Co~pany.
lb.
18) 75'){,Bandane and 25'){,Chlordane at 15 and 5,.20 and 6.6, and 30 arid 10
Velsicol Chemical Company. I, ": . .
Post-emergence
This area was located on asaridy loam s01l th~ was heavily infeste~,with
smooth crabgrass. The stand of turf was thin andcpnslsted of Colonial bentgrass,
creeping red fescue and Kentucky bluegrass~th,the former being the
most prevalent. The soil in the test area was oflbw fertility and the turf was
mowed regularly at a height of 1 1/2 inches.