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Forage Crop Establishment in Soil Containing Atrazine or Simazine Residues

  • Rodney J. Fink (a1) and O. Hale Fletchall (a1)

Abstract

Four forage grasses and five forage legumes were grown in greenhouse cultures containing 0.12, 0.25, 0.50, and 1.0 ppm of atrazine and of simazine in the soil. They were also planted April 2 and 9 in field plots which had been treated the previous spring with 0, 1, 2, and 4 lb/A of the same herbicides. In the greenhouse, atrazine produced more injury to the plants than simazine. In the field, residual simazine produced more marked injury. Tall fescue and alfalfa were the most tolerant crops. Timothy was the most susceptible. Red clover, Korean lespedeza, ladino clover, sweet-clover, orchardgrass, and bromegrass were intermediate.

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References

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1. Fletchall, O. Hale. 1958. The effects on subsequent crops of simazine treatments on corn. WSA Abstracts 1958 Meeting: 23.
2. Foy, Chester L. 1960. Weed control in agronomic crops—a report of progress. Proc. California Weed Conf. 1960:6672.
3. Scudder, W. T. 1959. Persistence of simazine residues in two central Florida soils. Proc. SWC 12:187.
4. Springer, Frank B. Jr. 1960. The effectiveness of simazine and atrazine as pre-emergence herbicides on corn in Delaware in 1959. Proc. NEWCC 14:237240.
5. Switzer, Clayton M. and Rauser, Wilfried E. 1960. Effectiveness and persistence of certain herbicides in soil. Proc. NEWCC 14:329335.

Forage Crop Establishment in Soil Containing Atrazine or Simazine Residues

  • Rodney J. Fink (a1) and O. Hale Fletchall (a1)

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