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Vol. 16—1962 - NorthEastern Weed Science Society

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Materials 499<br />

(1)<br />

(2)<br />

(3)<br />

(4)<br />

(5)<br />

(6)<br />

(7)<br />

(8)<br />

(9)<br />

(10)<br />

(11)<br />

(12)<br />

Calcium propyl<br />

ZiYtron<br />

Dacthal<br />

Dacthal<br />

Chlordane<br />

Dipropalin<br />

Trifl1Jralin<br />

DiphenattlUe<br />

DiphenatrUe<br />

arsona.te'<br />

Tricalcium arsenate<br />

Lead arsenate/arsenOU<br />

oxide complex<br />

Calci'Uillpropyl/calcium<br />

methyl arsonate mix<br />

(Amchem)<br />

(Dow)<br />

(Swift)<br />

(Swift)<br />

(Scotts) ,<br />

(Lilly)<br />

(Lilly)<br />

(Lilly) .<br />

(Agrico)<br />

(Chipman)<br />

(Kelly.<br />

Hestern)<br />

, (Vineland)<br />

;;,':2Ojg'on vermiculite carrier<br />

4.4%on organic carrier<br />

,~, on organic carrier<br />

2a$3%on organic/fertilizer<br />

carrier<br />

e% on vermiculite carrier<br />

2%on vermiculite carrier<br />

2%on vermiculite carrier<br />

~. on vermiculite carrier<br />

5.85%on fertilizer carrier<br />

48%on vermiculite carrier<br />

8.5/25.1%on inorganic"~~er<br />

It.7/5.3$<br />

f.;<br />

.0J:<br />

Dates of Application as Related to Crabgrass OrCfth '<br />

Evaluations<br />

AMCHEMResearch Farm<br />

Oak Terrace<br />

Pine Valley<br />

CC<br />

GO<br />

0'<br />

on vermiculite<br />

carrier<br />

March 18<br />

: !1~.~<br />

pre-emergence<br />

April 18 ',1" , pre-emergence<br />

Hay 18<br />

'.0 " a.t emergence<br />

June 5 early post-emergence<br />

July' 17 late post-emergence<br />

",<br />

Aprll13<br />

pre-emergence<br />

, May' 17 ,}><br />

early post-emergehOe<br />

r<br />

June 5 ,'" 'early post-emergenoe<br />

July' 17 .' .;:i late post-emergenOe'<br />

,~.<br />

]"~':-<br />

,<br />

April 18 :pre-emergence<br />

May4<br />

'," pre-emergence<br />

June 10 ;.:.; early post-emergElBOtl<br />

) ~<br />

Visual estimates of the ,proportion of each plot infested wit'll:<br />

crabgrass were made at intervals throughout the .... Bon", ~ese were cOnl'pered<br />

to the untreated check plots to obtain the Per Cent Control figures reported<br />

in the following ,tables. )')<br />

jl ...<br />

,<br />

;;r1! "=<br />

By the middle of A~ the crabgrass:ip1'8stat1on in alluntMted<br />

plots was so complete that 1.1;"~ or no tur.i'grOl!t~ showing.<br />

~,. .<br />

. ,: :1

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