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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254 Table 5. Number of CsrrotaFPtir 25 Feet' ot,aew'. Acrerate-of active in8!'841ent 10# Zyttlon 4# Amlbel1 4# Solan Handweeded 4# Solan 6# A1lilb~n 2# P,r.oltietr;yne 6# Solan 4# P!'1).llletryne 4 Diphenamid + PlY Pl :Ooty , .. r :. Tl j Pl Pl Pl Pl Pl BOW 1 ;"ig,' ."Number o'err-ots per 25 felt of , ,tlOK' v,~ ',' ' Y See Footnote #1, table 6. ~ See Footnote #2, table 6. dJ ';; Table 6. Weight Pel' Cut-Off Carrot Fo11~g Applioation of of., ya.rio~s He.rbic,~c!~,~ •. , "Acre 1'iltEl at actiYe1ngredlent Handweeaed 4# Promet.ryne 2# Prometryne 4# Solan' 6# Amtb~n 4# Solsp . 4# Amlben 4# Amiben+ 4# Diphenamid BOW 6# S91sn lO#Zytl'on' .. 4#Dl'henamld '.'BOW : L.E.p.SS ! Y Coty= ap~lled at Tl = applied at Pl =.applied. at y Means hav11lg the ,Pl'y ,;fl .Ooty Pl Tl Pl 'Pl , Pl Pl P1 ,.,1e co&;yle4o~ary stage of oar.rot,' 26 June, 1961. true leaf stage ot oarrots, 3 July, 1961. plant1l1h 12 June, 1961.'" .', .1. • v;·' same letter designations do not dlffe.r sign1f1­ cantly at the 5% level (Duncan's Multiple Range Test).

,255 CONTROLOF ANNUALWlmDSIN swDT CORNWITHATRAZINE, DICHLOROPHENYL ..MElrHOXY-MI!:l'HYLUREA, DINITRO-SEC-BUTYLPHENYL ACETATE,DIPHENAMID,ANDSEVERALPYRIMIDINES M.F. Trevett and Robert L1tnetiel~ Introduotion This paper is a report on the etfectivene,s of the herbioides listed in Table lin oontrolling annual b~o,aleaf weeds and ahrlcial grasses in sweet oorn. Procedure Seneoa Golden sweet OOl'nwas planted in a sandy loam soil. 5 June, 1961. Treatments were replioated se.en times in a rand,0­ mized block of single row plots paired with untreated plots. Sprays wel'e applied with one pass ot a .ma11p10t sprayel' at 40 pounds pressure and 50 gallon8 per acr-e volume~ Planting al'P~oation,s of herbie1des were made 6 June, 1961, Jll'eemergenoe applioations were made 13 June, 1961. The prinoipalbroadlear weeds were: Wild rutabaga (Brads1oa ~ L.), Spurry (sperpjula srvensis L.), Ragweed (AmbrosIa ~m1si1folia L.), and Sma~tweea (P01asonum,pensSlvanIoum t.)4 The prinoIpal annual grass wls Barnyar ,grass (Eo Inoofiloa ' oruspjslli L.). Results Treatments that did not diffel' signifieantly in effeot on yield at the 5 pel'cent level from the standard treatment of 2 pounds of atrazine per acre were: 6 and 8 pounds of Niagal'a 5178 applied preemergenoe, planting applioation ot 10 pounds of either R-3408 01' R-3400, 01' 3 pounds or Ca801'0n, and h~hd weeding, Table 2. Treatments pl'oducing lowel'yields than the six best tl'eatments did so because of eithel' inadequate broad1eat weed control or a reduction in stand of oorn, Table 2. 11 Associate agronomist and technical assistant, Department of "'-' Agl'onomy, Univel'sity of Maine, Orono, Maine.

,255<br />

CONTROLOF ANNUALWlmDSIN swDT CORNWITHATRAZINE,<br />

DICHLOROPHENYL ..MElrHOXY-MI!:l'HYLUREA, DINITRO-SEC-BUTYLPHENYL<br />

ACETATE,DIPHENAMID,ANDSEVERALPYRIMIDINES<br />

M.F. Trevett and Robert L1tnetiel~<br />

Introduotion<br />

This paper is a report on the etfectivene,s of the herbioides<br />

listed in Table lin oontrolling annual b~o,aleaf weeds and ahrlcial<br />

grasses in sweet oorn.<br />

Procedure<br />

Seneoa Golden sweet OOl'nwas planted in a sandy loam soil.<br />

5 June, 1961. Treatments were replioated se.en times in a rand,0­<br />

mized block of single row plots paired with untreated plots.<br />

Sprays wel'e applied with one pass ot a .ma11p10t sprayel' at 40<br />

pounds pressure and 50 gallon8 per acr-e volume~ Planting al'P~oation,s<br />

of herbie1des were made 6 June, 1961, Jll'eemergenoe applioations<br />

were made 13 June, 1961.<br />

The prinoipalbroadlear weeds were: Wild rutabaga (Brads1oa<br />

~ L.), Spurry (sperpjula srvensis L.), Ragweed (AmbrosIa<br />

~m1si1folia L.), and Sma~tweea (P01asonum,pensSlvanIoum t.)4<br />

The prinoIpal annual grass wls Barnyar ,grass (Eo Inoofiloa '<br />

oruspjslli L.).<br />

Results<br />

Treatments that did not diffel' signifieantly in effeot on<br />

yield at the 5 pel'cent level from the standard treatment of 2<br />

pounds of atrazine per acre were: 6 and 8 pounds of Niagal'a 5178<br />

applied preemergenoe, planting applioation ot 10 pounds of either<br />

R-3408 01' R-3400, 01' 3 pounds or Ca801'0n, and h~hd weeding,<br />

Table 2.<br />

Treatments pl'oducing lowel'yields than the six best tl'eatments<br />

did so because of eithel' inadequate broad1eat weed control<br />

or a reduction in stand of oorn, Table 2.<br />

11 Associate agronomist and technical assistant, Department of<br />

"'-' Agl'onomy, Univel'sity of Maine, Orono, Maine.

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