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Biocontrol of Sicklepod (Cassia obtusifolia) in Soybeans (Glycine max) with Alternaria cassiae

Published online by Cambridge University Press:  12 June 2017

H. Lynn Walker  and
C. Douglas Boyette
H. Lynn Walker
Affiliation:
South. Weed Sci. Lab., Agric. Res. Serv., U.S. Dep. Agric., Stoneville, MS 38776
C. Douglas Boyette
Affiliation:
South. Weed Sci. Lab., Agric. Res. Serv., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

In four tests conducted in 2 years, Alternaria cassiae Jurair and Khan effectively controlled sicklepod (Cassia obtusifolia L. ♯ CASOB) as indicated by stand counts of the weed and by soybean [Glycine max (L.) Merr.] yields. The number of sicklepod seedlings was reduced more than 90% within 14 days after foliar applications of A. cassiae conidia were banded (46 cm) at rates of 4.2 and 2.1 kg/ha (9.4 and 4.7 kg/ha broadcast, respectively). One banded application of 0.04 or 0.4 kg/ha (0.09 or 0.9 kg/ha broadcast, respectively) did not satisfactorily control sicklepod. These results indicate that sicklepod control may be enhanced by multiple applications of A. cassiae.

Keywords

Biological weed controlmycoherbicidemicrobial herbicideCASOB
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 2 , March 1985 , pp. 212 - 215
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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