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Optimisation de l'application du Metarhizium anisopliae var. acridum sur le criquet puant, Zonocerus variegatus (Orthoptera: Pyrgomorphidae)

Published online by Cambridge University Press:  28 February 2007

O.K. Douro Kpindou ,
C. Gbongboui ,
R. Badou ,
E. Paa-Kwessi ,
J.B. Ackonor  and
J. Langewald
O.K. Douro Kpindou*
Affiliation:
Biological Control Centre for Africa, International Institute of Tropical Agriculture 08 B.P. 0932 Cotonou, Bénin
C. Gbongboui
Affiliation:
Biological Control Centre for Africa, International Institute of Tropical Agriculture 08 B.P. 0932 Cotonou, Bénin
R. Badou
Affiliation:
Service National de la Protection des Végétaux, B.P. 58, Porto-Novo, Bénin
E. Paa-Kwessi
Affiliation:
Plant Protection and Regulatory Service Department, PO Box M.37FI, Accra, Ghana
J.B. Ackonor
Affiliation:
Cocoa Research Institute of Ghana, PO Box New Tafo Akim, Ghana
J. Langewald
Affiliation:
Biological Control Centre for Africa, International Institute of Tropical Agriculture 08 B.P. 0932 Cotonou, Bénin
*
*Email: [email protected]
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Abstract

Field experiments on reduced application doses of Metarhizium anisopliae var. acridum (I 91 609: Zonocerus variegatus strain) were carried out in 1996–1997 in southeastern Benin and central Ghana. The first experiment, which took place in southeastern Benin, consisted of ULV applications of an oil based formulation of M. anisopliae on 1-ha plots of cassava, at the rates of 1 × 1011, 4.65 × 1011 2.5 × 1012 and 1 × 1013 conidia/ha. In a second experiment carried out in central Ghana, the application doses were reduced by increasing the space between spray tracks. Treatments were applied at 5, 10 and 20m track spaces, corresponding to doses of 2.5 × 1012, 1.25 × 1012 and 0.625 × 1012 conidia/ha, respectively. After application, samples of L4–L6 larvae and adults of Z. variegatus were collected using sweep nets and their mortality monitored in small cages. Zonocerus variegatus population density was monitored at three-day intervals over a 21-day period. In southeastern Benin, analysis of survival time, resulting from the first sampling, did not reveal any significant difference between the various dose treatments. In central Ghana, for treatments at different doses and track spaces, there was no difference between 5 and 10m track spaces, corresponding to 2.5 × 1012 and 1.25 × 1012 conidia/ha. But the 1.25 × 1012 conidia/ha treatment at 10 m-track space reduced the application time by half (17 min instead of 34 min).

Keywords

Zonocerus variegatusMetarhizium anisopliae var. acridumdoseoptimisation
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 25 , Issue 4 , December 2005 , pp. 251 - 258
Copyright
Copyright © ICIPE 2005

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References

Bateman, R. P., Carey, M., Moore, D. and Prior, C. (1993) The enhanced infectivity of Metarhizium flavoviride in oil formulations to desert locusts at low humidities. Annals of Applied Biology 122, 145–152.CrossRefGoogle Scholar
Blanford, S. (1999) The role of environmental factors and behavioural changes observed in grasshoppers and locusts after infection with the entomopathogen Metarhizium anisopliae var. acridum University of Reading UK 235 pp..Google Scholar
Cherry, A. J., Jenkins, N. E., Heviefo, G., Bateman, R. and Lomer, C. J. (1999) Operational and economic analysis of a West African pilot-scale production plant for aerial conidida of Metarhizium spp. for use as a mycoinsecticide against locusts and grasshoppers. Biocontrol Science and Technology 9, 51–85.CrossRefGoogle Scholar
Coffi, A. (1992) République du Bénin: Situation acridienne (Edited by Lomer, C. J. and Prior, C.). Biological Control of Locusts and Grasshoppers Proceedings of a workshop held in Cotonou, 29 April– 1 May 1991 CAB International.Google Scholar
Douro-Kpindu, O. K., Godonou, I., Houssou, A., Lomer, C. J. and Shah, P. A. (1995) Control of Zonocerus variegatus by Ultra Low Volume application of an oil formulation of Metarhizium flavoviride conidia. Biocontrol Science and Technology 5, 131–139.CrossRefGoogle Scholar
Douro-Kpindou, O. K., Shah, P. A., Langewald, J., Lomer, C. J., van der Paauw, H., Sidibé, A., Daffé, C. O. (1997) Essais sur l'utilisation d'un biopesticide ( Metarhizium flavoviride ) pour le contrôle des sauteriaux au Mali de 1992 à 1994. Journal of Applied Entomology 121, 285–291.Google Scholar
Driver, F., Milner, R. J., Trueman, J. W. H. (2000) A taxonomic revision of Metarhizium based on a phylogenetic analysis of rDNA sequence data. Mycological Research 104, 134–150.CrossRefGoogle Scholar
Everts, J. W. (1990) Environmental effects of chemical locust and grasshoppers' control (A pilot study) Rome FAO.Google Scholar
Henderson, C. F. and Tilton, E. W. (1955) Tests with acaricides against the brown wheat mite. Journal of Economic Entomology 48, 157–161.CrossRefGoogle Scholar
Jenkins, N. and Goettel, M. S. (1997) Methods for mass production of microbial control agents of grasshoppers and locusts. Memoirs of the Entomological Society of Canada 171, 37–48.CrossRefGoogle Scholar
Langewald, J., Thomas, M. B., Douro-Kpindou, O. K. and Lomer, C. J. (1997) Use of Metarhizium flavoviride for control of Zonocerus variegatus: A model, linking dispersal and secondary infection from the spray residue with mortality in caged field samples. Entomologia Experimentalis et Applicata 82, 1–8.Google Scholar
Langewald, J., Ouambama, Z., Mamadou, A., Peveling, R., Stolz, I., Bateman, R., Attignon, S., Blanford, S., Arthurs, S. and Lomer, C. (1999) Comparison of an organophosphate insecticide with a mycoinsecticide for the control of Oedaleus senegalensis Krauss (Orthoptera: Acrididae) and other Sahelian grasshoppers in the field at operational scale. Biocontrol Science and Technology 9, 199–214.CrossRefGoogle Scholar
Lomer, C. J., Bateman, R. P., Godonou, I., Kpindou, D., Shah, P. A., Paraiso, A. and Prior, C. (1993) Field infection of Zonocerus variegatus following application of an oil-based formulation of Metarhizium flavoviride conidia. Biocontrol Science and Technology 3, 337–346.Google Scholar
Lomer, C. J., Thomas, M. B., Godonou, I., Shah, P. A., Douro-Kpindou, O. K. and Langewald, J. (1997) Control of grasshoppers, particularly Hieroglyphus daganensis, in northern Benin using Metarhizium flavoviride. Memoirs of the Entomological Society of Canada 171, 301–311.Google Scholar
Lomer, C. and Langewald, J. (2001) What is the place of biological control in acridid integrated pest management?. Journal of Orthopteran Research 10, 335–341.CrossRefGoogle Scholar
OTA (Office of Technology Assessment) (1990) A plague of locusts: A special report OTA-F-450 Washington, DC US Government Printing Office.Google Scholar
Peveling, R., Attignon, S., Langewald, J. and Ouambama, Z. (1999) An assessment of the impact of biological and chemical grasshopper control agents on ground-dwelling arthropods in Niger, based on presence/absence sampling. Crop Protection 18, 323–339.Google Scholar
Symmons, P. (1992) Strategies to combat the Desert Locust. Crop Protection 11, 206–212.Google Scholar
Thomas, M. B., Wood, S. N. and Lomer, C. J. (1995) Biological control of locusts and grasshoppers using a fungal pathogen: The importance of secondary cycling. Transactions of the Royal Society 259, 265–270.Google Scholar
Thomas, M. B., Langewald, J. and Wood, S. N. (1996) Evaluating the effects of a biopesticide on populations of the variegated grasshopper, Zonocerus variegatus. Journal of Applied Ecology 33, 1509–1516.Google Scholar
Thomas, M. B., Blanford, S. and Lomer, C. J. (1997) Reduction of feeding by the variegated grasshopper, Zonocerus variegatus, following infection by the fungal pathogen Metarhizium flavoviride. Biocontrol Science and Technology 7, 327–334.Google Scholar