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FIELD EXPERIMENTS ON THE TOXICITY OF ACEPHATE FOR CONTROL OF GRASSHOPPERS (ORTHOPTERA: ACRIDIDAE) ON RANGELAND1

  • R. Nelson Foster (a1), K. C. Reuter (a1), J. M. Gourd (a1), P. J. Enis (a1) and A. W. Wooldridge (a2)...

Abstract

Field tests were used to evaluate the efficacy of liquid acephate in aerial applications to control grasshoppers on rangeland. An antidrift additive applied with the treatment was also evaluated. A rate of 105 g AI/ha of acephate at volumes of 2337, 1899, and 1461 mL of mix/ha with the addition of Nalco-trol® resulted in control statistically as good as the standard malathion treatment of 653 g AI/ha. Two formulations of acephate applied at the rate of 105 g AI/ha in a volume of 2337 mL/ha were compared and resulted in statistically comparable mortalities; both formulations of acephate resulted in excellent control 10 days after treatment.

Des tests en champ ont permis d'évaluer l'efficacité de l'acéphate liquide appliqué par air contre les acridiens en prairie. Un additif anti-dérive utilisé avec le traitement a aussi été évalué. La dose de 105 g IA/ha d'acéphate dans un volume de 2337, 1899 ou de 1461 mL de mélange/ha avec l'addition de Nalco-trol® a permis un niveau de contrôle statistiquement aussi bon que le traitement normal au malathion à 653 g/ha. Deux formules d'acéphate appliqué à la dose de 105 g IA/ha dans un volume de 2337 mL/ha ont été comparées et ont causé des incidences de mortalité statistiquement comparables; les deux formules d'acéphate ont permis un contrôle excellent 10 jours après le traitement.

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References

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Anonymous. 1964. Grasshopper control. Fmrs' Bull. U.S. Dep. Agric. 2193. 12 pp.
Foster, R. N., Reuter, K. C., Henderson, J. A., and Wooldridge, A. W.. 1981 a. Orthene with Nalco-trol for control of grasshoppers on rangeland, 1979. Insecticide Acaracide Tests 6: 137.
Foster, R. N., Staten, R. T., Reuter, K. C., and Henderson, J. A.. 1981 b. Low rates of orthene for control of grasshoppers on rangeland, 1979. Insecticide Acaracide Tests 6: 137.
Keenan, L. C. 1980. Supplemental draft environmental impact statement, rangeland grasshopper cooperative management program, USDA, APHIS, 79-1-D. 28 pp.
Little, T. M. and Hills, F. J.. 1978. Agricultural Experimentation, Design and Analysis. Wiley, New York. 350 pp.
Mass, W. 1971. ULV Application and Formulation Techniques. N. V. Philips-Duphar, Crop Protection Division, Amsterdam, Netherlands. 164 pp.
Onsager, J. A. and Henry, J. E.. 1977. A method for estimating the density of rangeland grasshoppers (Orthoptera, Acrididae) in experimental plots. Acrida 6: 231237.
Onsager, J. A. and Mazuranich, P. C.. 1979. Control of grasshoppers on rangeland, 1978. Insecticide Acaracide Tests 4: 144.
Skoog, F. E., Cowan, F. T., and Messenger, K.. 1965. Ultra-low-volume aerial spraying of dieldrin and malathion for rangeland grasshopper control. J. econ. Ent. 58: 559565.

FIELD EXPERIMENTS ON THE TOXICITY OF ACEPHATE FOR CONTROL OF GRASSHOPPERS (ORTHOPTERA: ACRIDIDAE) ON RANGELAND1

  • R. Nelson Foster (a1), K. C. Reuter (a1), J. M. Gourd (a1), P. J. Enis (a1) and A. W. Wooldridge (a2)...

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