Herbicides for flue-cured tobacco. 1. Weed control, methods of soil incorporation, yield and value of tobacco

Rodriguez, E.B.; Worsham, A.D.

Tobacco International 175(24): 57-60

1973


Accession: 000107450

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Abstract
Benefin at 1.12 and 2.25 lb/ac, isopropalin at 1.5 and 3.0 lb/ac, pebulate at 4 lb/ac and R-7465 at 1, 2 and 4 lb/ac and various mixtures (1.5 lb isopropalin + 4 lb pebulate/ac, and 1 lb R-7465 + 4 lb pebulate/ac) were evaluated in 1970 at 4 sites. The herbicides were mixed with the soil by pre-bed disking in two directions to a depth of 4-6 in or by post-bed rotary hoeing to 2-3 in. All herbicides gave acceptable control of susceptible grass and broadleaved weeds, but poor control of Sida spinosa and Ipomoea purpurea. No consistent differences due to mode of incorporation were observed, and no plant injury occurred with isopropalin, pebulate or their mixtures, though high rates of pebulate and R-7465 alone or in mixture caused early season stunting when disk-incorporated. Yields were generally above 2000 lb/ac, compared with 1500 to 1800 lb/ac. in untreated control plots. Tobacco quality was not affected by any treatment.