Influence of Roundup Ready Soybean Production Systems and Glyphosate Application on Pest and Beneficial Insects in Narrow-Row Soybean

Roundup Ready® soybeans, Glycine max (L.) Merrill, in narrow-row planting systems were investigated in 1998 in Mississippi to evaluate the effects of the transgenic crop and glyphosate herbicide on pest and beneficial insects. Insects found in sufficient numbers for meaningful analysis included adult bean leaf beetle, Cerotoma trifurcata (Forster); adult three-cornered alfalfa hopper, Spissistilus festinus (Say); adult big-eyed bug, Geocoris punctipes (Say), and; larvae of green cloverworm, Plathypena scabra (F.), and velvetbean caterpillar, Anticarsia gemmatalis (Hübner). Populations of C. trifurcata, S. festinus, P. scabra and A. gemmatalis were not reduced in genetically altered Roundup Ready soybean, or by recommended (by label) or delayed applications of glyphosate. Numbers of G. punctipes also were not reduced in Roundup Ready soybean, but were reduced by recommended applications of glyphosate during weeks three and four following the second recommended herbicide application. Geocoris punctipes densities also were reduced at 1 and 2 wks after the first glyphosate application in plots in which the second application of glyphosate was delayed. Numbers of G. punctipes may have been indirectly reduced by glyphosate within sample weeks two and three because of variations in weed densities after treatment with the herbicide.

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The Effect of Alternative Southern Green Stink Bug (Heteroptera: Pentatomidae) Insecticide Controls on Soybean Pest Management, Quality and Yield

Journal of Entomological Science ◽

10.18474/0749-8004-30.2.216 ◽

1995 ◽

Vol 30 (2) ◽

pp. 216-236 ◽

Cited By ~ 7

Author(s):

R. M. McPherson ◽

D. J. Boethel ◽

J. E. Funderburk ◽

A. T. Wier

Keyword(s):

Methyl Parathion ◽

Field Trials ◽

Leaf Beetle ◽

Anticarsia Gemmatalis ◽

Lower Percentage ◽

Stink Bug ◽

Velvetbean Caterpillar ◽

Pyrethroid Insecticides ◽

Southern Green Stink Bug ◽

Residual Control

Seven alternative insecticides to methyl parathion were assessed for stink bug control and yield and quality losses in soybean field trials in Georgia, Louisiana and Florida during 1988 and 1989. Several pyrethroid insecticides including lambda-cyhalothrin, cyfluthrin, tralomethrin and cypermethrin controlled the southern green soybean stink bug, Nezara viridula (L.). These insecticides had greater residual control than methyl parathion, the standard for stink bug control, and acephate, another labeled soybean insecticide. The residual control of the pyrethroids also prevented the buildup of green cloverworm, Plathypena scabra (F.), velvetbean caterpillar, Anticarsia gemmatalis Hübner, and bean leaf beetle, Cerotoma trifurcata (Forster). Permethrin, another pyrethroid insecticide, did not provide adequate stink bug control at the rate tested. Yields and 100-seed weights in the alternative insecticide plots were equal to or exceeded those in the standard treatments. Soybean quality (lower percentage of stink bug damaged kernels) was higher in plots treated with pyrethroids. Several alternative insecticides for controlling stink bugs are available to replace methyl parathion in soybean, should this product become unavailable to producers due to its patent expiration or denial of re-registration.

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Influence of Roundup Ready Soybean and Roundup Ultra Herbicide on Geocoris punctipes (Say) (Heteroptera: Lygaeidae) in the Laboratory

Journal of Entomological Science ◽

10.18474/0749-8004-39.1.56 ◽

2004 ◽

Vol 39 (1) ◽

pp. 56-61 ◽

Cited By ~ 2

Author(s):

Ryan E. Jackson ◽

Henry N. Pitre

Keyword(s):

The United States ◽

Spray Application ◽

Laboratory Studies ◽

Transgenic Soybean ◽

Egg Hatch ◽

Geocoris Punctipes ◽

Roundup Ready ◽

Roundup Ready Soybean ◽

Glycine Max L ◽

Posttreatment Period

Roundup Ready® crops have become the dominant weed control system throughout the United States. Therefore, laboratory studies were conducted to evaluate the effects of Roundup Ready soybean, Glycine max (L.) Merrill, and glyphosate on the fecundity and mortality of Geocoris punctipes (Say). Mortality of third instars and adults (∼30 d old) and fecundity of females exposed to glyphosate by direct spray application or residual on soybean foliage were not affected over a 10-d posttreatment period. Mortality of nymphs and adults exposed to transgenic soybean foliage did not differ from mortality of nymphs and adults exposed to foliage of conventional, glyphosate-susceptible soybean. Exposure of G. punctipes eggs to glyphosate spray had no effect on egg hatch. The knowledge of the minimal effects of Roundup Ready soybeans and glyphosate on predaceous arthropods promotes the use of the Roundup Ready soybean system.

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