Vol. 16—1962 - NorthEastern Weed Science Society

lAs80o~~e ~!~r, ~?rm~~ Res~ch, Aa~istant',,:and Graduate stUdent,
CBSERVATIONS ONCHEMICAL CONrROLOF CRABGRASS IN TURF(1961)
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R.'A. Peters; H.:~:b.iokum, and Ie..C. 8teverisl
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Presently a large numbw o~ herbd.cides are avallable which 'show,pr:azdse
tor selective :control o~ crabgrass in turt. Further e'YSluationisneecled ot
available materials'used under a range ot conditions and at various ~s of
crab~ass growth. .
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Procedure: The aperU1ental. areas were laid out Cll'1the lawn ot the tJn!iyersity
ot Connecti~t at storrs. The areas were subjected to the same tert!ll"zation
and ~g ~ent as was thttt ~ ot the,.campua Uim. Individual, ~ot
size. was 4 by 25 (eet with each:~~. replioatid tbree times. fort!le
pre-emergence and emergence ~t. Onone;~gence area ~ A)
each plot was 4 b7 10 teet and ~ ~plicated fOur~8. On the otlllet:
post-.E!J]lergencearea (Area B) ~ p;ot was 10 bY'."~ .f'~ and was ~~ted
twice. ""i ,'.
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All ot the JDA¢eriala used 1I$re'granular except tc# the dactllal an«:
M-202; which .·.were appl.. ied as.. sp$8. at the rate 0..•t ~~.~ons per. ~~~.'. The
crabgrass P"lent,.. small.creJar&Js (Digitarla: i . ). The;~
perennial. gr&N species was Kentuck7bl.uegrass with an,admixture ot .co:{bniaJ.
bent on the ~gence sites. ';" "
The pre-Ellll8rpnce apPllcations'~re made oriMaZ'cll.~3l at which tU1~ the
bluegrass was just beginning to ~ up. The eij1ergence application.· were
made on Ma;r15 when less than 2; ~ent by estiiate ot the crabgrass
see