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peer-reviewed research article

Controlling rhizoctonia seedling disease of cotton in Southern California

authors

A. O. Paulus, Department of Plant Pathology, University of California, Riverside
F. Shibuya, Department of Plant Pathology, University of California, Riverside
J. Osgood, Tehama County
T. Dewolfe, Department of Plant Pathology, University of California, Riverside
D. Cudney, Imperial County
J. House, Imperial County

publication information

California Agriculture 24(8):12-14. DOI: 10.3733/ca.v024n08p12. August 1970.

author affiliations

Albert O. Paulus is Extension Plant Pathologist, Department of Plant Pathology, University of California, Riverside. Fugio Shibuya is Extension Laboratory Technician, Department of Plant Pathology, University of California, Riverside. Joseph Osgood, formerly in Imperial County, is now Farm Advisor in Tehama County. Thomas DeWolfe is Specialist, Department of Plant Pathology, University of California, Riverside. David Cudney is Farm Advisor, Imperial County; James House is Farm Advisor, Imperial County;

abstract

Best treatments for control of Rhizoctonia pre- and post-emergence damping-off of cotton seedlings were: (1) Terra-Coat L-21 (PCNB-Terrazole) seed treatment plus PCNB-Terrazole in-furrow granular; and (2) Demosan seed treatment. Demosan seed treatment plus Demosan in furrow granular was no better than Demosan seed treatment alone. Terra-Coat L-21 seed treatment plus PCNB-Terrazole in-furrow granular gave excellent control in one trial without the basic mercury treatment.

Intermediate in effectiveness were: (1) Vitavax seed treatment; (2) Terra-Coat L-21 seed treatment; and (3) PCNB in-furrow granular. However, Vitavax seed treatment was one of the best materials tested in two trials at the UC Meloland Field Station in Imperial Valley. Bay 78175 in-furrow spray effectively cantrolled Rhizoctonia damping-off in the only trial where it was applied.

author notes

The Delta Pine 16 cottonseed used in these trials was obtained from the Delta and Pine Land Co., Brawley.


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