Vol. 16â1962 - NorthEastern Weed Science Society
Vol. 16â1962 - NorthEastern Weed Science Society Vol. 16â1962 - NorthEastern Weed Science Society
178 LAUY CHliY4!OAL WEEDCONl'ROLINJlOrATOESWI'1'H~.·FORMUUTIONS OF .' . CDM, D~,':4ND or~ cHlj~c;~ . .AriblkHalddnel;;;:f L ~," GnnuJar formuJations of CDM, Dalapon and other ohemicals were applied a.fter the final oultivation in s~-4l fielQ80t Ka~ potatdeSwheN ~ grU8'~..b&rnl&:t'd~a88was expected. and occurred l4W.. A Gam;,'granuJ.6,tt'; ohemical appliCa:tor was used to. &PIWthemater1a1eln'moet of the tests:. ' . Materht s ADaMethods' ", . ,. J GranuJar f'OrmuJations conta~5 to 20%acti'Qcoh~..]a were appllM within a fewhOUl'li to ..one ·~af"ter f",irial cultivatiol1f,ot Kat4hdin potatoe,:; 111 several oOlllDercial ti~ during the period JuiT6 to;A'uq ).5.' :' C~isons of rates of CDM (~doJt) were maderlth hand-spread appll~tion on plots:3 rows wide x 16 fe~ 10ngl repl1oated.) t.sateach of two. locati~. Inother"teets granules of COM, D.alapon~4 other ohemicale wl'e br~ w11;h' a Gtmd:r. Lo-Hi 8-toqtgran~r chemic~ /ij?pllc"tOl' in plots " 8 teet x ~ t6 80 te.1S'I: long. The treatments were repllcated 2 to 4 tmes at each-location. The gravit;r-teedtype machine was c~.tedat the fie1d speed used, 4 MPH,before entering the fields. Provision Wasmade to brush granuJAle'. ott the plants. See details in previous article, Use of' Granular Chemical Applicator tot' IqbY' WeedControl.in Potatoes.!C) In meet instances the sUt loam to fins sandy loam soils were moist at the time the granulee were applied; in ,all cases nea.r],y ~!nch of rain occ~' within three day! afterappllcatiori. Nearly three iriChes of raj,n occurred ,"~ most of the locations during the period August 22-24; this reduced f'es1dual ' effect of some cnemicals especiallr at locations witl:1:,~er soils. Results iJIWDiscussions !"\. !!U! s::CDAA.:In colllf.&risonS'Qt CDM (Ranck:i:ij-'i~'12, :3,and 4\lbs. P.":i acre at several J.ocat1ona,the:3 Ib~rate provided goOd"to very good cont1'OJ" of' crabgrass during the earlY' part of' the "season at all locations. Follilwing the heavy' rainfall August 22-24, the 4 lb. rate was superior to the :3 lb. rate for crabsrass control in most of the tests. Where a btavy popuh.tion of crabgrass was controlled with :3 and 4 lbs. of Randox per acre and potatoes were not killed bY'a freeze until Jate in the season, imreases of 20 to 25% in yield '~f potatoes were obtained over adjoining untreated plots, Table 1. Control of b~rd grass with CDAAvaried with locations. Under the mozoe 'moist soil conditions at Fann D, 60 to 75%control of barnyard grass was obtained 1/ Agronomist and Potato Specialist, UniversitY' of Connecticut, St6rrs, Connecticut. The author acknowledges the excellent assistance of H. C. Yokum, former4" Research Assistant, in installing these tests.
w.l.th 3 and 4 Ibs. ot Randox per acre respectively, wb-1J.e 85 to 95%control was obtained at Far:m.S. Increasecl yields otpotatoe. were obtained with contrOl'dt ba~d grass and some :1alDQsquarlercontro-l at location 8, Table? 179 Table :I.- Eftect or Granular Fonn~tlons ot COM, and. Daiapon Applied at . ~ on Control ot Hig.h Popu.la.t1on of Crabsre.ss and on Yield or Katahdin Potatoes - F&1lIlG - Connecticut 1961 .CrabFaelS Control Active Rate ...L21Ch~ Yield 1/ %of Chegk CDAA 20G (Randox) it lbe/A sAO =722 3 4 95 100 85 95 121 125 Dalapon lOG 4 (All 70 ?/ 5 wilted) 95 l24 , t 1/ Yield, on s:1ng~ plots 2 rows x 50 feet, in percent ot adjoining check. 2/ Adjoining checkcl&Iaged by spray tracks. . ~ 2! DalapotH In a field with a heavy popuJation or crabgrass the use or Dalapon at 5 lbs."per acre resulted in nearly 95%csbntrol"and was far' superior to the 4 lb. rate. Control or crabgrassw.l.th 5 lbs. Dalapon resulted . in a 24%irorease in yields of potatoes over yields on untreated plots, Table 1. The crabgrass tleedlings on treated plots grew 3 to 4 inches in height befar~ death occu1'!'ed. ,,' Moderate control or barnyard grass was obtained with Dalapon at 4 and 5 lbe. per acre and resulted in ihorea8ed yield of potatoes at two locatione where this grass was the JI':l.maryproblem, Table 2. Table 2 - Effect or GranuJar "Formulations of CDAAand Dalapon Applied at La,y-by to Potatoes, on J3a~rd Grass and Ytit-ld8 of Katahdin Potatoes, Connect1cut - 1961 Farm D Farm S CDAA 20G (Randox) Dalapon lOG Active Rate )bs/A Barnyard Yield 1/ Barnyard Yield 1/ Grass % ot· Grass % at Control Check: Control Check 9/22 9/22 % % % 3 60 2/ . 85 4 75 2; 95 4 5 50 1123/ 70 75 99 4! SO % III 21 1284;1 107 5 1/ Yield, 2 rows x 50 feet, in percent of yield of adjoin:ing check. \....... 2/ No adjoining check for cOlllJ:'B-rison 3/ Average of 3 comparisons 4/ single comparisons 5/ average 2 comparisons
- Page 127 and 128: WEEDCONTROLANDTHE IMPROVEMENT OF SE
- Page 129 and 130: Following emergence of the tomato s
- Page 131 and 132: indicates that several of the treat
- Page 133 and 134: DISCUSSIONOF RESULTS Transplant Tom
- Page 135 and 136: harvest was covered with weeds, and
- Page 137 and 138: An additional 2 years of tests on f
- Page 139 and 140: ~ Table 2 .--l Average Number and P
- Page 141 and 142: ~ Table 4 Total Yields in Number an
- Page 143 and 144: "" ~ Table 6 Bvalu~t1.on of S&l~nto
- Page 145 and 146: of weed eoneee I without inj ury 't
- Page 147 and 148: 1. Associate Research Specialist in
- Page 149 and 150: Stulllll&ry A study was lh1tlatedto
- Page 151 and 152: Table 2. The residual effects of se
- Page 153 and 154: FURTHEROBSERVATIONS ONCONTROL OF TH
- Page 155 and 156: Table 3 - Mean per cent brake contr
- Page 157 and 158: lAssociate Research Spec1alist in W
- Page 159 and 160: PRE-E~mRGENCE WEEDCONTROLTEST IN RE
- Page 161 and 162: 161 Table 2. Tolerance of Beets and
- Page 163 and 164: 163 Results generally were good wee
- Page 165 and 166: USE OF GRANULAR CHl!H[CALAPPLICATOR
- Page 167 and 168: u.s. #1 potatoes and weed control e
- Page 169 and 170: 0' ~ Table 2. Pre-emergent weed con
- Page 171 and 172: Table 3. Post-hilling weed control
- Page 173 and 174: ~/Pe.nt>:r lITn. h.7(L T1o:oTl.,:r+
- Page 175 and 176: In table 2 are presettted weed a*1'
- Page 177: Since rec1root is only one of the I
- Page 181 and 182: 181 CONTROLOF ANNUALWEEDSIN pOTATOE
- Page 183 and 184: The following comments on the vario
- Page 185 and 186: 185 S\:U!U!1fryand ConclWtlon No he
- Page 187 and 188: 187 Table 2. Potato YIelds Followin
- Page 189 and 190: Residue analysis of potatoes treate
- Page 191 and 192: soil temperatures at the time the m
- Page 193 and 194: ( ( ~able 2. Effect of Several Che~
- Page 195 and 196: 195 PROBLEMSIN THEAPPLICATIONOF HER
- Page 197 and 198: 197 scale tests on 2 cOlJllllercial
- Page 199 and 200: l!!!! Experiment A factorial experi
- Page 201 and 202: frOlll plot. at .horter i*nalt (~ t
- Page 203 and 204: 6.50 Table 1. Effe,ct of p"e- an
- Page 205 and 206: 205 EVALUATION0It' DACTHAL * HERBIC
- Page 207 and 208: The 1959 and 1960 replicated field
- Page 209 and 210: 209 TABLEII Average Weed Cont~l Exh
- Page 211 and 212: Where the weed eompleJl;conststs of
- Page 213 and 214: ...... 1.67, 213 Table 1. Effect of
- Page 215 and 216: 215 Table 2. Bffect of pre-plant he
- Page 217 and 218: .217 Pive pre-plant herbicide. were
- Page 219 and 220: 219 Table 1. Effect of pre-p1anthel
- Page 221 and 222: Table 2. tilat' of pre-plantbftb.tc
- Page 223 and 224: l EVALUATIONOF THREEHERBICIDESONPnE
- Page 225 and 226: TABLE2. TIll HIGHESTlATEOFHERBICIDE
- Page 227 and 228: Because of the lush growth of quack
178<br />
LAUY CHliY4!OAL WEEDCONl'ROLINJlOrATOESWI'1'H~.·FORMUUTIONS OF .'<br />
. CDM, D~,':4ND or~ cHlj~c;~ .<br />
.AriblkHalddnel;;;:f L<br />
~,"<br />
GnnuJar formuJations of CDM, Dalapon and other ohemicals were applied<br />
a.fter the final oultivation in s~-4l fielQ80t Ka~ potatdeSwheN ~<br />
grU8'~..b&rnl&:t'd~a88was expected. and occurred l4W.. A Gam;,'granuJ.6,tt';<br />
ohemical appliCa:tor was used to. &PIWthemater1a1eln'moet<br />
of the tests:. ' .<br />
Materht s ADaMethods' ",<br />
. ,. J<br />
GranuJar f'OrmuJations conta~5 to 20%acti'Qcoh~..]a were appllM<br />
within a fewhOUl'li to ..one ·~af"ter f",irial cultivatiol1f,ot Kat4hdin potatoe,:; 111<br />
several oOlllDercial ti~ during the period JuiT6 to;A'uq ).5.' :'<br />
C~isons of rates of CDM (~doJt) were maderlth hand-spread appll~tion<br />
on plots:3 rows wide x 16 fe~ 10ngl repl1oated.) t.sateach of two.<br />
locati~. Inother"teets granules of COM, D.alapon~4 other ohemicale wl'e<br />
br~ w11;h' a Gtmd:r. Lo-Hi 8-toqtgran~r chemic~ /ij?pllc"tOl' in plots "<br />
8 teet x ~ t6 80 te.1S'I: long. The treatments were repllcated 2 to 4 tmes at<br />
each-location. The gravit;r-teedtype machine was c~.tedat the fie1d speed<br />
used, 4 MPH,before entering the fields. Provision Wasmade to brush granuJAle'.<br />
ott the plants. See details in previous article, Use of' Granular Chemical<br />
Applicator tot' IqbY' <strong>Weed</strong>Control.in Potatoes.!C)<br />
In meet instances the sUt loam to fins sandy loam soils were moist at the<br />
time the granulee were applied; in ,all cases nea.r],y ~!nch of rain occ~'<br />
within three day! afterappllcatiori. Nearly three iriChes of raj,n occurred ,"~<br />
most of the locations during the period August 22-24; this reduced f'es1dual '<br />
effect of some cnemicals especiallr at locations witl:1:,~er soils.<br />
Results iJIWDiscussions !"\.<br />
!!U! s::CDAA.:In colllf.&risonS'Qt CDM (Ranck:i:ij-'i~'12, :3,and 4\lbs. P.":i<br />
acre at several J.ocat1ona,the:3 Ib~rate provided goOd"to very good cont1'OJ"<br />
of' crabgrass during the earlY' part of' the "season at all locations. Follilwing<br />
the heavy' rainfall August 22-24, the 4 lb. rate was superior to the :3 lb. rate<br />
for crabsrass control in most of the tests. Where a btavy popuh.tion of crabgrass<br />
was controlled with :3 and 4 lbs. of Randox per acre and potatoes were not<br />
killed bY'a freeze until Jate in the season, imreases of 20 to 25% in yield<br />
'~f potatoes were obtained over adjoining untreated plots, Table 1.<br />
Control of b~rd grass with CDAAvaried with locations. Under the mozoe<br />
'moist soil conditions at Fann D, 60 to 75%control of barnyard grass was obtained<br />
1/ Agronomist and Potato Specialist, UniversitY' of Connecticut, St6rrs, Connecticut.<br />
The author acknowledges the excellent assistance of H. C. Yokum,<br />
former4" Research Assistant, in installing these tests.