Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T07:15:22.840Z Has data issue: false hasContentIssue false
  • English
  • Français

Factors Affecting Biological Control of Spurred Anoda (Anoda cristata) with Alternaria macrospora

Published online by Cambridge University Press:  12 June 2017

H. Lynn Walker
H. Lynn Walker*
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Sci. Ed. Admin., Agric. Res., Stoneville, MS 38776
Get access Rights & Permissions [Opens in a new window]

Abstract

In greenhouse studies, spurred anoda [Anoda cristata (L.) Schlecht.] control by Alternaria macrospora Zimm. was influenced by stage of growth, inoculum concentration, and the temperature and duration of the dew periods following inoculation. Seedlings inoculated at the cotyledon to first-leaf stage were most easily controlled. Optimum dew periods for killing seedlings were ≥ 24 h at 20 to 30 C. Spray mixtures containing 2.5 to 10 × 105 spores/ml gave the best control. In field studies, A. macrospora significantly reduced the number and the dry weight of spurred anoda plants.

Keywords

Biocontrolmycoherbicidebiological weed control
Type
Research Article
Information
Weed Science , Volume 29 , Issue 4 , July 1981 , pp. 505 - 507
Copyright
Copyright © 1981 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Ohr, H. D., Chandler, J. M., and Jordan, T. N. 1975. Destruction of spurred anoda in cotton by a naturally occurring plant disease. Proc. South. Weed Sci. Soc. 28:123.Google Scholar
2. Ohr, H. D., Pollack, F. G., and Ingber, B. F. 1977. The occurrence of Alternaria macrospora on Anoda cristata in Mississippi. Plant Dis. Rep. 61:208–209.Google Scholar
3. Sciumbato, G. L. and Walker, H. L. 1980. A comparison of four Alternaria isolates associated with cotton and spurred anoda. Proc. Beltwide Cotton Prod. Res. Conf., p. 185.Google Scholar
4. Walker, H. L. 1980. Alternaria macrospora as a potential biocontrol agent for spurred anoda: Production of spores for field studies. U.S. Dep. Agric., Sci. Ed. Admin., Adv. Agric. Techn. Southern Series (ISSN 0193–3728), No. 12. 5 pp.Google Scholar
5. Walker, H. L. and Sciumbato, G. L. 1979. Evaluation of Alternaria macrospora as a potential biocontrol agent for spurred anoda (Anoda cristata): Host range studies. Weed Sci. 27:612–614.CrossRefGoogle Scholar