Vol. 16—1962 - NorthEastern Weed Science Society

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Table 2. Pre-emergent weed control experiments with Kennebec and Delus potatoes (R.I. 1961).
Average Av. # weeds per sq. ft. Gms. Ratin!
Active Bu/A June 12. 1961 Dry weight Ladys-
Toxicant U.S. #1 Ladys- Annual Weeds/sq. ft. th1,lll
Material Ib/A Kennebec Qe1us thumb Ragweed grasses June 26 9126!t
1. D!'eP+Zytron 3+f) .. 646 491 3.0 1.,9 2.8 . 0.21 9.]
2. DNBP+Dalapon 3+3+{4 post-) 674 433 7.2 . 0.2 5.4 0.22 9.~
3. DtI.'BP+Dal apon 3+3 573 464 0.6 0.2 3.1 0.43 9.~
4. Zytron 8 508 407 13.4 6.2 1.9 2.93 7 .~
5. Amiben (gran.) 5 525 388 9.7 4.2 1.5 2.06 7.t.
6. Zytron 5 509 414 12.8 5.8 2.2 3.18 7.e
7. Falone 4 534 388 14.2 5.3 0.3 9.04 4.]
8. Falone 4+{4 post-) 566 390 16.2 6.9 6.1 9.07 I.e
9. De.lapon 4 589 388 24.4 9.3 4.0 22.32 2.~
10.· P'rometryne 3 654 459 0.6 0.3 1.6 0.48 8.1
ll. Atrametryne 3 539 436 0.3 1.1 1.4 0.33 8.~
12. Ipazine 3 517 461 0.0 0.0 2.4 0.08 9.~
13. Trietazine 3 661 441 0.0 0.8 2.5 0.05 9.~
14. Trietazine 3+{2 post-) 612 406 0.4 0.7 1.2 0.04 9.e
15. No cultivation
- 579 390 11.2 6.0 5.6 11.05 1.~
16. CUltivated - 590 438 - - - - 7.e
LSDat 0.05 NS NS
*low numbers - high weed cover,
10 = no weeds
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