Vol. 15—1961 - NorthEastern Weed Science Society

250.
· t'·,­
The 1957tests were conducted on a large field of Empire trefoi I
which had been in production for some years previously. The experimental
design was a randomized block witb 4 replications. Each plot mea~ured
20 feet in width and 100feet in length. Seed yie1ds were obtained from
five sub-samp fes cut from each ce I I, dr ted at If 0 0 F. for ,6hours, then
threshed out by hand. Pesticide materials and rates and date of application
are given in Teblei. ' ,
TABLEI." EFFECTOF APPLICATiONS OF INSECTIC'IOES ANDHERBICIDES'
ONEMPI R£ BIROSFOOTREFOIL GROWN' FORSEED.
Pounds Active Pounds Clean
Pestioide InWedi entiA. ','$eed/A~
, Delepon ' '3.00 ,J96.5
£ndrin
0.20 '
&iDalapen' '.00
J".7
Toxaphene 2.25
&:Dalapon 3.00 154.0
Check 9.+.0
--------------------------------_._------~---------~-------~--
AppI i 68~'i on, date M.ay'2, 1,0/51.,'
Harvest date July 17, 1957.
The 1959and 1960tests were conducted on a large, well established
field of Mansfield trefoil, pfantiad in 1954, and in production of registered
seed since 1955. Pesticides used, rates per acre, and dates of
applications are shOwn t n tab'es2 and ',. In the 1959 tes.t ,the herbi':'
cideswete applied as'sub~plot treatments of a 5 x 5 Latin square with
the sub-plots of herbicides measuring 20 x 100 feet. Samples were taken
as, desert bed fer the 1957trials.' ' ,
TABLE2.
EFFECTSOF APPUCATIONSOF HERBiCiDESONMANSFIELD
BIRDSFOOTREFOILGROWNFORSEED.
Pounds Active POUndsClean Pounds OVen-Dry
Herbicide I"gred i ent /A • Seed/A~ Forage/A.
Dalapon 2.;35 148.28
, " Dalapon 2.35
&:Neburon 2.00 158.96
Delapon I 2.35
&:4-(2,4-08) 0.5 136.03
------------------------.---~----------------~._---------~---
Application date M.ay5. 1959.
Harvest date July 15. J959~
1
, Butyrac 1'8