Vol. 16—1962 - NorthEastern Weed Science Society

3~ J
.. i,c matt.er" which
these rates. On, lighter .~Hs" low in orMD
predominate outside the Ct>it;15elt" rate8~:f:3l4 to 1-1/4 p~
per acre gave effective .!~:~ontro1 with !lP adequate safety .
margin.' ':.:' , .. . .
Fo11~8e spray's of H8r~~~ide ~26are~tgbly effective on;'! .
grOWing annual-plants. AHnl.cdve effect is achieved by directing
the spray nozzles to wet the growing portion of the weeds'
while avoiding the same on corn 1>lant!J.Th1s, type ofapplic~,- .
tion has been most promising when thec~ft--wes at least 12 tnches
tall. lolhennozzles were1llC?unted so that~spray struck only
a fetl inches 'up the cornit~tk, only sUIM*~tt-=Ul injury to the ,
. .bottom leaves has been noeed. ~leeds up ttL 0 inches tall were
,controlled Wit:h,~"l/2 to ~: ,peJtindsper acr.~' ,These rates he ...
. provided' adequate'residual~ed controlog'the various so11 H~S
prevalent'1ncorn"growing areas. Established corn has shown a .
good margin of safety to directed post-emQrgence applicatiog ••
In Corn Belt soils" where rates of 2 to 3,!~s perae:re'ari;
recommended, rates up to .6 pounds have be..~ gon-injurious. In
lighter soils" With recommended rates of t~1/2 to 2 pounds ~
~re ,,4 'poUnds has proven jeh to corn. s'Fay volumes in ~.,.,',
range of, 30 gallons have perlormed wep.. $pr.ay pressures of
40 p.s.i. or'lower arene_nded topre~1'ltmisting.'
In t1¥)st sit~tions band';treatments W£llbe most econom!~al.
The weeds remaining ;;Lnthe middles can be removed by cultivat;ing
during the spray operat:Lonic...:The nozzles· fl\ou-ld be' mounted ahead
of the cultivator to el1mi~te weeds on tl).e edge of the band.
This procedur$"would red\We",.tM amounto~~X:bicide requ;l.re!;lLPY
ewo-thfrCts. .:' " '" .... . ... :,. ' .'. '
The an1'lUaigrassesan~. t~oadleaf .~~~.~ich .have been 'fe
controlled satisfactorily With recommended r.tes include foxtail
,(green" yellow ..and giant) , Crabgrass,; bams.rd grau or. watergrass"
smartweed" rasweed, purslane" lati1b,":quarters" pigweed-l
" .., ',", ", ' "" ~' " ..J ' ; t I
buttol1We.ed and cocklebur ... .: ... i
. RepreS$ntAt1ve weed'c~~olresult. ~Qyield data are·
'containedin Tables'l throlJgl1 6. . .
Pre-Emergence' Weed Control
in Soybeans
. Resulu~m field t~~:..dUring a ewo-year period at 30)
locatioga in U states have,·demonstrated chat Herbicide 326"
appli~d at re~oUlD8nded rates, will provide effecti~ pJ;'e-e~gence
, , ; r' •