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Augmenting the Moth (Bactra verutana) in Field Plots for Early-Season Suppression of Purple Nutsedge (Cyperus rotundus)

Published online by Cambridge University Press:  12 June 2017

K. E. Frick  and
J. M. Chandler
K. E. Frick
Affiliation:
Entomol. and Agron., South. Weed Sci. Lab., Sci. Ed. Admin., Fed. Res., U.S. Dep. Agric., Stoneville, MS 38776
J. M. Chandler
Affiliation:
Entomol. and Agron., South. Weed Sci. Lab., Sci. Ed. Admin., Fed. Res., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

In six years of field studies, early-season releases of the native moth Bactra verutana Zeller were evaluated as a biological control for purple nutsedge (Cyperus rotundus L.). Establishment from adult releases required at least 10 pairs of moths per release; establishment from larval release could be achieved with a single release of two or five newly-emerged larvae per shoot. When shoots averaged 4 or 7.5 cm high at the time of such releases, aboveground growth was reduced 32 to 62% after 30 days. Three to eight weekly releases of larvae reduced the topgrowth of nutsedge planted in rows of cotton (Gossypium hirsutum L. ‘Stoneville 213’) 30 to 68% 6 to 8 weeks after the last release. Weekly releases of about five larvae per shoot repeated three, four, or five times in 1976 and 1977 reduced nutsedge growth so that seed cotton yield equalled that of cotton in plots without nutsedge. MSMA (monosodium methanearsonate) applied at the rate of 2.2 kg/ha 5 and 7 weeks after cotton emergence gave greater control of purple nutsedge topgrowth and a yield of seed cotton equal to that resulting from three to five larval releases of about five larvae per shoot beginning when purple nutsedge averaged 7.5 cm high. When MSMA was applied at 7.5 and 8.5 weeks after cotton emergence, the addition of two early-season releases of larvae were also necessary to achieve nutsedge control and seed cotton yield equal to that produced by three to five releases of larvae.

Keywords

Cotton-yieldbiological-controlmass-releaseintegrated control
Type
Research Article
Information
Weed Science , Volume 26 , Issue 6 , November 1978 , pp. 703 - 710
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

1. Cevallos, A. and Navia, D. 1971. Biologia y comportamiento de Bactra sp. Resumenes, Tercer Seminario, COMALFI: 1–2.Google Scholar
2. Frick, K. E. 1978. Purple nutsedge (Cyperus rotundus L.): a case for augmentation. in Freeman, T. E., ed. Proceedings of the IV International Symposium on Biological Control of Weeds. Univ. of Florida, Gainesville, Florida.Google Scholar
3. Frick, K. E. and Chandler, J. M. 1974. Culture and early release of Bactra verutana, a biological agent for purple nutsedge control. Abstr. Weed Sci. Soc. Am. pp. 66–67.Google Scholar
4. Frick, K. E. and Garcia, C. Jr. 1975. Bactra verutana as a biological control agent for purple nutsedge. Ann. Entomol. Soc. Am. 68:7–14.CrossRefGoogle Scholar
5. Frick, K. E. and Quimby, P. C. Jr. 1977. Biocontrol of purple nutsedge by Bactra verutana Zeller. Weed Sci. 25:13–17.Google Scholar
6. Garcia, C. Jr. and Frick, K. E. 1975. Bactra verutana, a possible biological control agent of purple and yellow nutsedge: large scale rearing on artificial diet. Ann. Entomol. Soc. Am. 68:15–18.Google Scholar
7. Ghosh, C. C. 1922. Supplementary observations on borers in sugarcane, rice, etc. Agric. Res. Inst., Pusa, Bull. 134:105–136.Google Scholar
8. Habib, R. 1976. Bactra spp. in Pakistan and their potential as biocontrol agents of Cyperus rotundus . PANS 22:449–508.Google Scholar
9. Holm, L. G., Pluncknett, D. L., Pancho, J. V., and Herberger, J. R. 1977. The World's Worst Weeds, Distribution and Biology. Univ. Press of Hawaii, Honolulu, 609 pp.Google Scholar
10. Keeley, P. E., Thullen, R. J., and Miller, J. H. 1970. Biological control studies on yellow nutsedge with Bactra verutana Zeller. Weed Sci. 18:393–395.Google Scholar
11. Wills, G. D. 1977. Pernicious weeds in cotton-nutsedge. Proc. Beltwide Cotton Prod. Res. Conf., pp. 164–165.Google Scholar