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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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330<br />

The experimental areal"8C~*ved no tiuce,thl'oughout the:~..<br />

ing season, the weeds :I.n t~:,~epte:r:'24: inl1b 'Jltmpsbetween rows being<br />

controlled by a directed spray applioation of atrazine at 2<br />

pounds active ingredient per •• c~ u.tlli-z.1ng',a 1a:l.apsacktype sprayer.<br />

The atrazine applioation was made as a post-emergence treatment with<br />

respeot to weed development. <strong>Weed</strong>e not killed by the spray were<br />

either removed by hand or by hand hOeing.<br />

Perlo41cinspectlons ot-UlPlots we~ ii!e,tQma1l.ltaintg,e<br />

desired weed,-populationand:ctori~emove uriae~1~a~~ weeds. /~~',<br />

" .- , , '; 0" ' " '<br />

Data w~r. COlle~ted d~1q':tlle seas6~ .t6(f~~e.t'o1l0wing:~~nt<br />

he1ght, -ear,sboOt emergenoe i I1lkemergerioe"i (,ear ),;e1Sht.. tase:e~', ~, .<br />

emerglilnoe, pollen maturity, and grain y1eld. . r, '" " ' •<br />

Cornae1ght; - < ,» ""-" , "<br />

. - ''''. ' .' ;':.: 1 ~ . r.·.) .. "'d,'<br />

Themean oom, he1ght, ,(-vC't'1oal d1stande· f'*'o m the ~Oll~~<br />

to the t1p o.t'thehighestexteaNed lea-f) was!~ l!llgnif1cantJ;t'lnfluencedby<br />

-broadl4!l8t or grae.''W8edg dV1..!% r~season; h.owev-~...<br />

there WJoIUl:de.t'1n1te tendenofl ~or the b1'Oa~ weeds to red\l~ ,'<br />

the mean he1ght of plants more so than grass weeds.' Nitrogen '8'1gni.t'1oantly<br />

1noreased ·the mean he1ghtof co~. .This was espec+ally<br />

apparent it1mulated tl\'i- earliness of slU.<br />

development to a s1gn1f1oan~:~.nt over t~,ro~~plots rece1y~Di:<br />

no nitrogen., ,', . !. ' ,"[<br />

Ear Height:<br />

~ " ': /. _ _ _. .,' ~_:. _ " . , . ~:J' L<br />

The mean e~ height (v.. Ucial height tram· s011 Surt'aQ8 to ear<br />

attaQ,hment node) of corn pl~8 was UnatteCittd 'by weedt~e o~Aena1ty,<br />

h~wev~, the1J18an ear height within n+i;rogenplots. was .~';'<br />

n1.t'1oantly greater than tho.', O'tplots reoEi1:V1r1$no nitrogen.<br />

Tassel<br />

Emergence:<br />

Braodleaf and graas wee~;tlpparEmtlyexot.d no 1n.t'luence'on<br />

theearlin, esao.t', t,assel emergence, however,; ,'~tro,,gen appli oat,.i,J.,M", S<br />

a1gni1'1cantl:V st1mulated the" re&%ll1ness 0:: ta"elemergenoe o'\!'er,:;<br />

plots l'ece1v1ng l»n1trogen" '-, " ',:"" , . . -;~~~<br />

;:r1"j

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