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Comments on Tests of Herbicide Mixtures

Published online by Cambridge University Press:  12 June 2017

Donald P. Gowing
Donald P. Gowing*
Affiliation:
Pineapple Research Institute of Hawaii
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Extract

One of the important areas of current herbicide research is the investigation of herbicide mixtures. It is a common field experience that use of a single material—even of a “broad-spectrum” herbicide—exerts a selective pressure on the field population because of differential effectiveness on the various weed species. There is some evidence that a part of this derives from purely mechanical considerations (e.g., the spraying system in use may not reach plants of different growth habit equally well), but in any case the weed control program often appears to decrease in effectiveness after several seasons. In addition to favoring the survival of particular species, the non-eradicatory application of even a highly efficient chemical apparently aids in the establishment of populations of individuals which are physiologically most tolerant of the herbicide used. It will probably be granted, then, that the use of mixtures of toxicants will provide more effective control of populations of mixed weed species, and may also reduce the numbers of individuals and species exceptionally tolerant of the herbicide program, especially when the toxicants kill by affecting different physiological processes.

Type
Research Article
Information
Weeds , Volume 8 , Issue 3 , July 1960 , pp. 379 - 391
Copyright
Copyright © 1960 Weed Science Society of America 

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References

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