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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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205<br />

EVALUATION0It' DACTHAL * HERBICIDEON<br />

TREES, SHRUBSANDHERBACEOUS ORNAt-lENTALS<br />

Al~ertDiDario, H~ H~~arris, T. L. Curr,y and L. G. Utterl<br />

Field studies were intt1a~d in 1959, at~'P;;inesville, Ol:lio, and,<br />

expanded in 1960 and 1961 to detJ):'liI1rie bo th the weedicide activity oi'DACTHAL<br />

l:lerbicide (dimethYl-ester of tett'ao!lloroterephthalic., ac,1d)and the tolerance<br />

exhibited by ornainentals to trea1flftih'ts with this material. During this three ...<br />

year period, awi1ie range ofsee¢lJ~;;:transplanted and established ornlll\lentlil<br />

crops in 90 genera were evaluate¢,:in~ found to be completely tolerant to<br />

DACTHALherbicide at rates up to~lS'p'ounds active per acre. Such broad. ~roP<br />

tolerance WO\lJ,dpef/llit spray an~altl~ular treatments: to. be made in seed beds,<br />

lining out ofnur~ stockand~.'],i!.hdscaped plantings when these crops ate<br />

grown on mineral soils. .....<br />

Detaiis on the: procedU:f.e$~d results of these tests follow.<br />

Materials<br />

and Methods:<br />

Ornamental species listed in the following cai;egories were treated<br />

with DACTHALup to 15 pounds active per acre in the three-year trial. The listing<br />

shows plant species and yea,r(s);inc1uded in the field test program. (1)<br />

indicates inclusion in the 1961 tes~; while (0) is for 1960 and (9) for 19S9<br />

test periods, respectively:<br />

WOODYORNAHENTAL LINERS<br />

Abe1ia grandiflora 1<br />

Euxus sempervirens 1<br />

Cotoneaster sa1icifolia 1<br />

Deutzia gracilis 1 "<br />

Euonymous~ compacta 1<br />

Forsythia intermedia.O, 1<br />

Hedera Helix 0, :c' "<br />

~gea sp, , Nikko ,Blue i<br />

I ex Aquifolimn 0,1' .', '<br />

I. crenata convexa 9, 0, 1<br />

Juni~erus chinensis, Hetzi 1<br />

Kalmu latifol1a 1 ..<br />

r:rgustrmn :vulgare 0, 1<br />

Magnolia SoUlangeana 0; 1<br />

Mahonia nervosa 0, 1<br />

Parthenocissus tricusgidata 9, O~;.J: -r<br />

Philadelphus virginalJ.s 1 ._.<br />

PERENNIALHEHEACEOUS LINERS<br />

Achillea spp. (mixed) 0, 1<br />

~ genevensis 0, 1<br />

Anchusa myosotidiflora<br />

Aquilegia spp.:,.(llybrids)<br />

Artemesia albula 1<br />

Aster spp. (mixed) 0, 1<br />

C'iiiiiPanulapSrsu:ifolia 1, .<br />

Chrysanthemmn aPP., (miXed) 0, 1<br />

Coreopsis ver~icil1ata 0, 1<br />

Dianthus sp, , Her Majesty 0, 1<br />

Dicentra spectabilis O~ 1<br />

Delphinimn spp, (mixed) 0, 1<br />

Echinacea ~urea 1<br />

Erica carnea. ,<br />

ii'e'UcIierasanguinea 0, 1<br />

Hosta undulata 1<br />

Iberis s~rens 0, 1<br />

* Registered Trademark' of Diamon4 Alkali Company ,<br />

1 Senior Research B101cgists, Formulation Chemist, and Manager, Agricultural<br />

Chemicals Research, respectively,T. R. Evans Research Center, Diamond<br />

Alkali Company, Painesville; Ohio .

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