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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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EVALUATIONOF FIVE _~p>I!:S FOR KILLING ~TABLISHED POISON. IV¥<br />

IN AN APPLEORCHARD~ YEARSFOLLOWINO"t\SINGLETREATMENT •..<br />

Oscar E. Schubert l:<br />

This study is being cont1n~1i to detennine th~:-number of years a single<br />

herbicide application will give ~'significant redubtion in poison ivy when<br />

compared with unsprayed chec'ks-; .Add1tional detail's tli"'the experiment and<br />

yearly results have been repor1:;E!~Jn the ProcEledings of the Northeast <strong>Weed</strong><br />

Control Conference (1,2,3). .... ".!: .<br />

Seventy-two plots (l/lOOth"acre in area) were::~ls.ssified according to<br />

the relative denSity of poison ivy, and then groupc'~lnto twelve replications,<br />

each with similar poison ivy stands. Six replications composed of six plots<br />

each were laid out around treell' ..8:Qdo.nother sUe replications were laid out<br />

in spaces between tree plots itf the tree row. The~erbicides were applied<br />

at ra.nliom within each replication. '<br />

Between A\lgUSt 13 and 17, ,1957, ATA, 2,4,5-'1' ~~ter, Sllvex, 2,4,5-'1'<br />

Amine, and Ammate were applied tQ, J(ell established.:iioison ivy in a mature.<br />

apple ore:bB.rd'. All herbicides,~x

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