Vol. 15—1961 - NorthEastern Weed Science Society

271.
Chlordane must be used at rates in excese of 60 Ibs. a.i./acre' for
satisfactory ,crabgrass control; ThiS! studysho-wed granjJ.lar chlordane as
the most effective formulation .. " . i' ' 1
~ .
Dacthal was nontoxic to :commonand Merion bluegr~ss, but significantly
reduced the density of P~mlawn' .tescue and :colonial bent. i ';
, '
Daothal .f'on;uJ.ations were very effective forpree.I1lergence crab~a~s
control." , "
. , ' , .
Zytron emulsions, M-1329, will tetJlPOr~ discolor Menon blupgrass
and reduce the density o~ Pennlawn fescue and 'colonial ~nt. ; ,
. :Zytro~, M-I662, reacted similarly to Dacthal, but was not a:1'severe
on Permlawn fescue and c~lonial bent density at the rates used in +,his
stu~.,
Zytro:n formulations are 'very effective fOl\ preemergenqe crahgrass
control. " . .
:, ! t
,Calcium arsenate discol$red and inhibited growth of Pennlawr::fescue
and Q)1.c:mialbent, but was not too severe on reducing their density. It
was nontoxic to commonand Merion bluegrass and resulted in satisfactory
crabgrass control.;