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A Smooth-Cone Spreader for Application of Dry Herbicide Formulations

Published online by Cambridge University Press:  12 June 2017

Jim E. Dale
Jim E. Dale*
Affiliation:
South. Weed Sci. Lab., Agric. Res. Serv., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

A new machine consisting of a detachable hopper of containerized granules with a preselected circular orifice to regulate flow of granules, and a revolving hollow-cone spreader turned by an electric motor, was tested. Flow of herbicide granules at typical use rates was linearly correlated with orifice diameter. Coefficients of determination for flow rates of alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide], trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine], and norflurazon [4-chloro-5-(methylamino)-2-(3-(trifluoromethyl)phenyl)-3 (2H)-pyridazinone] were 0.96 or greater. Based on patterns of distribution of commercial trifluralin granules parallel and perpendicular to a linear path, the machine could be used to apply herbicide granules in row crops. Control of johnsongrass [Sorghum halepense (L.) Pers. # SORHA] with alachlor plus oryzalin [4-(dipropylamino)-3,5-dinitrobenzenesulfonamide] applied preemergence (pre) as sprays and granules did not differ significantly in soybean [Glycine max (L.) Merr. ‘Forrest′]. Trifluralin granules applied preplant incorporated (ppi) at 1.1 kg ai/ha controlled 80 to 95% of the johnsongrass and doubled soybean yield compared to the cultivated control plot. Norflurazon plus alachlor pre at 1.7 to 2.2 plus 2.2 to 3.0 kg ai/ha controlled annual grasses and prickly sida (Sida spinosa L. # SIDSP) equally with sprays and granules.

Keywords

Alachlornorflurazonoryzalintrifluralinapplication equipmentSORHASIDSP
Type
Special Topics
Information
Weed Science , Volume 35 , Issue 3 , May 1987 , pp. 438 - 443
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

Literature Cited

1. Connick, W. J. Jr. 1982. Controlled release of the herbicides 2,4-D and dichlobenil from alginate gels. J. Appl. Polym. Sci. 27:3341–3348.CrossRefGoogle Scholar
2. Dahl, G. H. 1984. Controlled release pesticide formulations. Pages 203–211 in Siewierski, M., ed. Determination and Assessment of Pesticide Exposure. Elsevier Press, New York.Google Scholar
3. Dale, J. E. 1984. Multichemical granules formulated with gum xanthan, loess, and tung oil. Weed Sci. 32:315–319.Google Scholar
4. McWhorter, C. G. 1974. Johnsongrass control in soybeans with trifluralin and nitralin. Weed Sci. 22:111–115.Google Scholar
5. McWhorter, C. G. 1977. Johnsongrass control in soybeans with soil-incorporated dinitroaniline herbicides. Weed Sci. 25:264–267.Google Scholar
6. Shasha, B. S., Doane, W. M., and Russell, C. R. 1976. Starch encapsulated pesticides for slow release. J. Polym. Sci. 24:417–420.Google Scholar
7. Steel, R.G.D. and Torrie, J. H. 1960. Principles and Procedures of Statistics. Pages 161–196. McGraw-Hill Book Co., New York.Google Scholar