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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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!a~l~ 1._ ~!:.c!: :!!1~hJl!:e.::m~d_h~r£i~i!!e!!.~' _<br />

Chemical Rate/A Mulch <strong>Weed</strong> Ratin;.! Crop Yield<br />

-1- mC-CInc.r- - _lE.S lT- - - - -NO'~ - - - - - g.O- - - - - J:.bt.!)?~C£.;.. -<br />

2 II II Mixed T.; .44<br />

3 II II Under 6.5 1.09<br />

4 CIPC (EC) 6- No 8.5 1.67<br />

5 II Mixed 9.0 1.06<br />

6 " Under 9.6 1.37<br />

7 CDEC(EC) t No 6.5 1.06<br />

II<br />

8 Mixed 7.0 .57<br />

9 " Under 6.0 .91<br />

10 CDEC(EC)+ CDAA(EC)3+4lJ2· No 7.5 1.18<br />

U Mixed 7.0 ·52<br />

12 Under 6.5 .61<br />

13 CNOSBP 5 No 8.5 .15<br />

14 Mixed 2.5 1.15<br />

15 Under 4.5 .81<br />

Av. of 4 checks No 2.2 1.15<br />

Yes 1.0 .56<br />

73<br />

!J Supplied by Esso.<br />

gj See fOotnote 1 Table 1.<br />

Summary and 'Conclusions<br />

1. Agricultural petroleum mulch frequentlY enhances weed growth.<br />

2. Herbicides can be effectivelY used in conjunction with this mulch both<br />

mixed with or under the mulch. However, each chemical must be eVaJ..uated individualJ,.y<br />

with respect to compatibility and effects on activity.<br />

3. The residual effectiveness of CDEC.a~ cDAAwas~~ng1;hened when used<br />

in conjunction with mulch. ..<br />

4. Compatibility problems arise with certain herbicide formulations such<br />

as Atrazine Bow,IJe.cthal 50Wand DNOSBPamine salt liquid.<br />

5. The physical condition of the soil surface is important when using<br />

petroleum mulch since this factor materially affects the type of seal resulting.

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