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Factors Influencing Oat Injury from Triazine Residues in Soil

Published online by Cambridge University Press:  12 June 2017

K. P. Buchholtz
K. P. Buchholtz*
Affiliation:
University of Winconsin, Madison
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Abstract

Factors influencing injury to oats from 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) and 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) residues in the soil were studied over a period of five years. Initial rate of triazine application was highly important with significant injury in about one-half of the trials on plots treated with 2 lb/A the year prior to planting oats, and on all plots treated at 4 lb/A. No material difference was found on plots treated with equivalent rates of atrazine and simazine. Granular preparations of atrazine left a residue that was more injurious than wettable powders. Disking the seedbed for oats, rather than plowing, resulted in greater injury. Cultivation of the corn between the rows after treatment did not influence the injury the following year. Soil type did not have a marked effect on injury in this study. Above-normal average mean air temperatures appeared to reduce injury the following year in some instances. Experiments initiated in years of abundant rainfall during April to October tended to have less injury the next year than experiments initiated in years when rainfall was limited.

Type
Research Article
Information
Weeds , Volume 13 , Issue 4 , October 1965 , pp. 362 - 367
Copyright
Copyright © 1965 Weed Science Society of America 

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References

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