Authors: JECH, L. E.; FOSTER, R. N.; COLLETTO, D.; WALGENBACH, D. D.; ROLAND, T. J.; RODRIGUEZ, G. D.; BOHLS, R.; HOUSTON, R. D.; MEEKS, W. K.; QUEENER, R. L.; JACKSON, C. L.; DINES, J. L.; PUCLIK, M. J.; SCOTT, A. K.

Source: Journal of Economic Entomology, Volume 86, Number 2, April 1993 , pp. 557-565(9)

Publisher: Entomological Society of America

Abstract:

Control of rangeland grasshoppers with flaky wheat bran treated with diflubenzuron and carbaryl was tested in South Dakota during 1988 and 1989. Diflubenzuron (0.75 or 1.0% [AI]/kg) was delivered at 1.1 and 2.2 kg/ha and carbaryl (2.0% [AI]/kg) at 1.1 kg/ha. In 1988 and 1989, diflubenzuron and carbaryl treatments were equally effective. The 2-yr (1988 + 1989) combined total population reductions ranged from 34.9 ± 10.5% for the diflubenzuron 0.75% (AI)/kg applied at 1.1 kg/ha to 66.7 ± 11.0% for the diflubenzuron 1.0% at 2.2 kg/ha. The standard carbaryl 2.0% AI/kg at 1.1 kg/ha was 57.9 ± 6.0%. The variability between the applications at the two sites was caused mainly by the difference in prevailing weather patterns. Sublethal effects were noted for the effects of treatment on the average age of the grasshoppers. At Edgemont, SD, in 1989, five species of grasshoppers occurred in all before-treatment counts and were analyzed in detail. Two species, Cordillacris occipitalis (Thomas) and Amphitornus coloradus (Thomas), did not feed on the bait and showed no mortality. Aulocara elliotti (Thomas) was controlled, but no significant differences among the treatments were detected. Diflubenzuron and carbaryl treatments significantly reduced populations of Ageneotettix deorum (Scudder) and Phlibostroma quadrimaculatum (Thomas). Observations 1 yr after treatment of these species revealed that P. quadrimaculatum and A. deorum continued to exhibit residual effects of treated bran.

Document Type: Research article

Publication date: 1993-04-01

More about this publication?

• Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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• By this author: JECH, L. E. ;  FOSTER, R. N. ;  COLLETTO, D. ;  WALGENBACH, D. D. ;  ROLAND, T. J. ;  RODRIGUEZ, G. D. ;  BOHLS, R. ;  HOUSTON, R. D. ;  MEEKS, W. K. ;  QUEENER, R. L. ;  JACKSON, C. L. ;  DINES, J. L. ;  PUCLIK, M. J. ;  SCOTT, A. K.

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