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Droplet Size and Phytotoxicity of Herbicides

Published online by Cambridge University Press:  12 June 2017

K. S. McKinlay ,
S. A. Brandt ,
P. Morse  and
R. Ashford
K. S. McKinlay
Affiliation:
Canada Dep. of Agr., Res. Sta., Saskatoon, Saskatchewan, Canada
S. A. Brandt
Affiliation:
Crop Sci. Dep., Saskatoon, Saskatchewan, Canada
P. Morse
Affiliation:
Statistical Research Service, Canada Agriculture, Ottawa, Canada
R. Ashford
Affiliation:
Crop Sci. Dep., Saskatoon, Saskatchewan, Canada
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Abstract

An oil soluble formulation of the dodecyl (51% w/w) and the tetradecyl (13% w/w) amine salts of (2,4-dichlorophenoxy)acetic acid (2,4-D) was diluted with diesel oil and applied in homogeneous sprays of 100, 200, and 400-μ. droplets to seedlings of sunflower (Helianthus annuus L. ‘Peredovik’). At each droplet size all combinations of five dosage levels and five spray volumes were compared. For the same applied dosage the amount of stem curvature increased as droplet-size was decreased. When compared with 100-μ droplets, approximately three times and six times as much active ingredient was needed to produce the same effect with 200-μ and 400-μ droplets, respectively. For a fixed droplet-size, the effective dosage could be increased equally well by increasing the concentration or by increasing the number of droplets per unit area.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 5 , September 1972 , pp. 450 - 452
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Behrens, R. 1957. Influence of various components on the effectiveness of 2,4,5-T sprays. Weeds 5:183–196.CrossRefGoogle Scholar
2. Buehring, N. W., Evetts, L. L., and Santelmann, P. W. 1969. Activity of several herbicides as influenced by physical properties and spray drop-size. Proc. S. Weed Sci. Soc. 22:398–402.Google Scholar
3. Douglas, G. 1968. The influence of size of spray droplets on the herbicidal activity of diquat and paraquat. Weed Res. 2:205–212.CrossRefGoogle Scholar
4. Ennis, W. B. and Williamson, R. E. 1963. The influence of droplet size on effectiveness of low-volume herbicidal sprays. Weeds 11:67–72.CrossRefGoogle Scholar
5. Fisher, C. E. and Young, D. W. 1950. The effect of herbicide droplet size on the control of mesquite when applied by airplane equipment. Proc. N. Cent. Weed Contr. Conf. 7:84–86.Google Scholar
6. Hurtt, W., Vile, C. A., and Reid, C. P. 1969. A preliminary report on herbicide effectiveness as influenced by drop-size and number. Proc. Northeast. Weed Contr. Conf. 23:418.Google Scholar
7. McKinlay, K. S. and Glen, G. S. 1971. A shrouded spinning disc for production of homogeneous sprays. Can. J. Agr. Eng. Res. 13(1): 19–22.Google Scholar
8. May, K. R. 1949. An improved spinning-top homogeneous spray apparatus. J. Appl. Phys. 20:932–938.CrossRefGoogle Scholar
9. Maybank, J. and Yoshida, K. 1968. The delineation of herbicide drift hazards on the Canadian prairies. Amer. Soc. Agr. Eng. Transcrips 12:21–23.Google Scholar
10. Smith, H. H. 1946. Quantitative aspects of aqueous spray applications of 2,4-dichlorophenoxyacetic acid for herbicidal purposes. Bot. Gaz. 107:544–551.CrossRefGoogle Scholar
11. Vega, M. R. and Obien, S. R. 1963. The influence of droplet size on the effects of 2,4-D on rice and weeds. Philippine Agr. 47:6–7.Google Scholar
12. Way, J. M. 1969. Some effects of droplet size and position on response of lettuce to sub-lethal doses of MCPA. Weed Res. 9:272–278.Google Scholar