Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society Vol. 16—1962 - NorthEastern Weed Science Society

08.06.2015 Views

The petunial in the Till .. treated plots exhibited little to moderate reduetion in 8rowth due to weed competition. Thi. injury decreas.d a. the herbicide concentration was increased. No injury WI obaened due to 220 and 3 weeks.' . In' the Yorl~ 'tnatad p10te n add4t¢oaal planting. was ....... the fourth week following treatment. All of the p1ants'vere watered at the time of traD.p1anting and throughout tha grow:l.n8 season rainfell was supplemented by 'OYUbead' irrigation. . RBSULt8..1!mDlSCYSSIQl(:'~_ The jlote were checked tot weed control July' and Ap8. 22, 1961~'i" appro~il88te1y 5 and 12 wee~.'ter treatment. Table 1.• ~ri.es the perfol'lll&nce of the pre-plant·;~rbic:l.de. on weed control. The following chemietl. _bowedgOod ",.4 CQ~Cr91 after 5 .. e~1I j ..CI,-otOIl at 2. 4aluL_. 8 PO_I per acre, BPTCat 5&fld 10 pound. per acl'~, a-1607 at 5 and 10.,.. pounda .pel' ecre, and Tillam .• e,-.10 pounda per acre. After· 12 weeka the .'. followiD8 chamicala .howed~cl weed control j Caeoron at 8 pound. per acre and a-1607 at 10 pounda'Par ecre. . . . Predominant weedl in the ,lou were 18111baquar~er. yellow foxtai1,.;\ .... green p~d, Caneda thiltl •• Pennly1vania 8I88rtWed.aad purslane.Weed. of 1e.. ~r frequency included ,d,nde1:l.0n. yellow wood.orre1., three leeded mercurf, .tinkgra.s, barnyard'Sras •• v.lvet1eaf, b1ack;~indweed. common rapreed. lren.f.osa:aU, hairy .crabll'a .. , pur,ple 1o.Y-ara.. , mustard,r.Q\IIb pipeed, .'181 's p1aDtain, 8ro\1ndcherry, timothy. ~urdock. wild 1ettu,ce •. and ttab~.... ed. On September 13.1961, approximately 15 weeke efter.herbicide application, the.. petUDi.. were eX8lil1l\8d.for aDy detr.:I.alHt.•t ..•ffect. due to '. .. herbicideand from weed competition. The data on ~e type of plant 8~ produced L. 11IIIIUri.ed in Table 2. , •. ..... .' . , . \ The petunias in the check plots were IIIOde;r.t. \:0' .evere .tunting due to. weedcompetit;1og. '.'the plant.~p the. Caeoron titaeed plota .. I" f~ .... sUsht to moderately stunted. The petuniaa in the 2 pound per acra.plota exhibited a1:l.sht to moderata injury due to weed cOllJ1)~tit:l.on. SU$Ilt ..',: stunting aDd necro.il waa observed in the 4 poundaper acre p10ta, this' injurt .a. due to a combination of weed competition and herbicidal action. Plantl in the 8 pound per acre plot. Ihowed moderate Itunting and .nacrosis due to the herbic:l.de. The herbic:l.de in the 4 and 8 poundl per acre treatmenta appeared to have long ree:l.duel activity. The lIetunia plants in the BPTCtreated plote exhibited sli8ht to moderate stuntins becaute of weed competition. No injury from herbicide wa. obsened even wilen they were tr.lplanted one day after treatment in the hiBbelt rate per acra plote. The plant. in the a-1607 treated plota had 111lht to levere reduction in growth Where weeda were not controlled by the chemical. The petunia. in the 10 pound pel' acre plotl were not injured. The petunias Ihowed no herbic:l.da1 injury even when planted one day after treatment.

Table 2. tilat' of pre-plantbftb.tcld •• and wed,OomIteUt1on on petunia •• Checs.tflfteen -.k.,·gnr tre .... nt. " . I 221 Herbicide' Active Rate o .""'Ll' 2 cl.y da" EPTe 2\1/A S/f/A ...lot/ A.. a-1607 Till_ Vorlex o :. " •., .0 r'2~tA" 5i/A 1~1j. "'0 1'2\#/~' Sl/A 10l/A Plant Injury Scale: '3.08 2.3& 2.'7 .~!02c~; 3.13 3.13 3~46 ~.04 • :':~,lf~~' 2.54 3.17 2.79 2,96 i,is 3.00 3.33 2.61 2.50 2.29 2~~ 2.58 3:~;~ 3.79 3.71 "3;th; 2.88 2.92 4.46 3.59 3.50 3.29 1.25 1.92 2.11 2.83 1.71 -. ;0l'~' .r.u 0.92.;O'~,~L. 0.75 3.46 3.S8 3.88. 5.00. ;' ., 2.17 3.33 1.79 2.79 2.96 2.54 1.46 O.~; 3.33 2.08 1.79 1.17 o - No Inj a'~y 1 - Very .l!g~t nacrosis or .tuntlng 2 - Slight cecro.1. or stunting 3 • MOderate n6cro.la or stunting 4 - Severe llecroais or .tunting S - Dead

Table 2. tilat' of pre-plantbftb.tcld •• and wed,OomIteUt1on on petunia ••<br />

Checs.tflfteen -.k.,·gnr tre .... nt. " . I<br />

221<br />

Herbicide'<br />

Active<br />

Rate<br />

o<br />

.""'Ll' 2<br />

cl.y da"<br />

EPTe<br />

2\1/A<br />

S/f/A<br />

...lot/ A..<br />

a-1607<br />

Till_<br />

Vorlex<br />

o<br />

:.<br />

" •.,<br />

.0<br />

r'2~tA"<br />

5i/A<br />

1~1j.<br />

"'0<br />

1'2\#/~'<br />

Sl/A<br />

10l/A<br />

Plant Injury Scale:<br />

'3.08<br />

2.3&<br />

2.'7<br />

.~!02c~;<br />

3.13<br />

3.13<br />

3~46<br />

~.04<br />

• :':~,lf~~'<br />

2.54 3.17 2.79<br />

2,96 i,is 3.00<br />

3.33 2.61 2.50<br />

2.29 2~~ 2.58<br />

3:~;~ 3.79 3.71 "3;th; 2.88<br />

2.92 4.46 3.59 3.50 3.29<br />

1.25 1.92 2.11 2.83 1.71<br />

-. ;0l'~' .r.u 0.92.;O'~,~L. 0.75<br />

3.46<br />

3.S8<br />

3.88.<br />

5.00.<br />

;'<br />

.,<br />

2.17<br />

3.33<br />

1.79<br />

2.79<br />

2.96<br />

2.54<br />

1.46<br />

O.~;<br />

3.33<br />

2.08<br />

1.79<br />

1.17<br />

o - No Inj a'~y<br />

1 - Very .l!g~t nacrosis or .tuntlng<br />

2 - Slight cecro.1. or stunting<br />

3 • MOderate n6cro.la or stunting<br />

4 - Severe llecroais or .tunting<br />

S - Dead

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