Vol. 16â1962 - NorthEastern Weed Science Society
Vol. 16â1962 - NorthEastern Weed Science Society Vol. 16â1962 - NorthEastern Weed Science Society
342 Approximately five weeks after herbic1~1 applications were made, weed control and corn injury ratings were made by several independent observers using the scale 0 to 10, where 0 =no effect and 10 - complete control or kill. These data were transposed to square roots in O~d8r to permit more valid statistical analy~is. The corn was harvested trom the two center rows on October 2 and 4. Yields were determined by obtain1ag ten butt samplelS and drying these to constant weight, then converting all fiel~ weights to 15.5 per cent moisture. J Results and Discussion The principle weeds observed in the e~erimental area were barnyard grass (Echinochloa crussa11i) and lambsquarters (~podium ~). The weed oontrol data expressed as square roots for the . three granular sizes for the two partiole breakdown types and at the two rates of herbicidal applioation are presented in Figure 1. It oan be seen that the material carried on the 30/60 size of the RVMtype granular effeoted less weed control than that of the, LVM granular type. The 24/48 size produced a higher level of control than the 30160 size as RVMgranu1ars, however, both sizes displayed comparable oontro1 with the LVMtype. Whenthe various mesh sizes of the granular preparations were oompared at the two rates, irrespeotive of granular breakdown or granular ooncentration, two interesting observations were made. Firstly, at the li pound rate the 24/48 meSh size produoed the highest level of oontrol the 20/35 mesh size produoed the poorest control, and the 30/60 size was intermediate. Seoondly, the inherent differenoes observed at the lower rate of 2,4-D were ob 1it4rated at the three pound rate. The effeots of particle breakdown and granular concentration on weed control, irrespective ot formulation and particle size, are presented in Figure 2. It oan be seen that the 10 per cent ooncentration granular showed better weed control than the 20 per cent material with the RVMtype. However,'phese two ooncentrations gave similar results with the LVMgranular. . There ~as a slight differenCe in weedpontrol in favor of the 10 per oent ooncentrationat the high r.te of 2,4-D. When these two conoentrations were. compared at the 1; pound rate, ~he control was similar. .
·000 .000, I II ! WEEDCONTROLRATINGS'EXPRESSED AS SQUAFi...; OOTS .:::I' 0 o (IJ (IJ co .~ ~ ""'-co .:T ~-q (IJ ~~ ": , co ! I ! 1- I!\ ~ n , l~ r-~ ('/') ~ d- I 0 (IJ 0 ~ - I RVM LVM LIQ. Fig. 1 .:T (IJ --'-r 0 ~ - ; .('/') 0 ,.- ('/') i I!\ ('/') I n l~/A , I I I d- (IJ I 3/A I 343 WEEDCONTROLRATINGS EXPRESSED AS ". SQUAREROOTS-- I~ !~ .ooq I ~ 0 ~ r-f \-'i ~.~- I I (-I I , I I~ I 1 i I I.. (IJ_ I ,~ I I ~-.c:\I I I 1 ~ I --, . ! I I I I , ! I ! I I ! I RVM LVM Fig. 2 * Distance reauired for sia:nificance Rt c;
- Page 291 and 292: so11 per plot at each sampling date
- Page 293 and 294: 418' 293 Table III Main Eff,ects of
- Page 295 and 296: Table V, }nt ...... e..• ,fa~, I;
- Page 297 and 298: plots showed smaller decreases with
- Page 299 and 300: FURTHEREVALUmONor HERBICIDESFal· W
- Page 301 and 302: 301 In the SUIIIIIlf)1' seeding, th
- Page 303 and 304: The results were similar to those o
- Page 305 and 306: In another experiment, loam soil wa
- Page 307 and 308: apparently due to severe competitio
- Page 309 and 310: ab1e 2. Average dry weight of corn
- Page 311 and 312: 311 The most strllt~Mrr~ct. ~fiIIJI
- Page 313 and 314: 313 RE9lfm'$~lfI)DI3CtlSSION '1.",
- Page 315 and 316: 315 LrrERATURECITED 1. Fertig, Stan
- Page 317 and 318: .~ pattern following applications o
- Page 319 and 320: Ratings at the time of'gJ;Vllst; al
- Page 321 and 322: THERESPONSEOF NUTGRASS TO HERBIC~I)
- Page 323 and 324: '\.......- TABLE2. Ratings of Nutgr
- Page 325 and 326: All treatments produced si~1f~c~tly
- Page 327 and 328: A 327 WEBDe
- Page 329 and 330: . Eli'FECTSali' WEEDSON YIELD AND"G
- Page 331 and 332: Pollen Maturity: ",l. ,. Broadleaf
- Page 333 and 334: '--' The applicators were tested un
- Page 335 and 336: 335 Figure 1. The effeetof partic1e
- Page 337 and 338: 337 SRFeader 1 On this spreader onl
- Page 339 and 340: Table 4. The effect of speed, p~~cl
- Page 341: Table 1: Herbicidal treatments used
- Page 345 and 346: 2.5000 CORNINJURY EXPRESSEDAS SQUAR
- Page 347 and 348: 347 1. 2. Danielson. l , ;4. L. Ef~
- Page 349 and 350: ',-- 34~ 3-(3 ..4-Dichlorophenyl)-1
- Page 351 and 352: weed control with adequate safety t
- Page 353 and 354: Untreated Table 2. Directed Post-E"
- Page 355 and 356: .s .... __ Table 7. Pre-Emel'ae~eWe
- Page 357 and 358: experiment is reported herE!. Trifl
- Page 359 and 360: Results are given. in Table 4~J'Rot
- Page 361 and 362: In Princeton fine sand, tritlupalin
- Page 363 and 364: Included in the lima. bean test wer
- Page 365 and 366: Table 1. The Effects ofS8veral form
- Page 367 and 368: Table 3. The effects of several for
- Page 369 and 370: 369 Table 5. The effects of sev~ral
- Page 371 and 372: • ~ : .• \ • ' -' ..,,:- ',-"
- Page 373 and 374: Heights of barley were significantl
- Page 375 and 376: Table 2. The effe,cts of s~\I'~ral
- Page 377 and 378: Table 4. 377 The effects of aevel8.
- Page 379 and 380: ,:' A PROGRESSREPORTONCOMIo!ERCIAL
- Page 381 and 382: 4. Undesirable dead stem.,lio not r
- Page 383 and 384: areas under service conditionsa~ va
- Page 385 and 386: We ,prpbablyhave no speeie of g~owt
- Page 387 and 388: control. At the end of the third ye
- Page 389 and 390: initial defoliation was evident lat
- Page 391 and 392: OBJECTIVE In 1958 an experiment was
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WEEDCONTROLRATINGS'EXPRESSED AS<br />
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343<br />
WEEDCONTROLRATINGS EXPRESSED AS<br />
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Fig. 2<br />
* Distance reauired for sia:nificance Rt c;
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