Increased Tolerance of the Boll Weevil and Cotton Fleahopper to Some Chlorinated Hydrocarbon Insecticides in Central Texas in 19581

1960 ◽  
Vol 53 (1) ◽  
pp. 52-56
Author(s):  
C. R. Parencia ◽  
C. B. Cowan
Keyword(s):  
Boll Weevil ◽  
Chlorinated Hydrocarbon ◽  
Central Texas ◽  
Cotton Fleahopper

Boll Weevil Resistance to Several Chlorinated Hydrocarbon Insecticides in Georgia1

1962 ◽  
Vol 55 (6) ◽  
pp. 944-947
Author(s):  
H. H. Tippins ◽  
C. M. Beckham
Keyword(s):  
Boll Weevil ◽  
Chlorinated Hydrocarbon

Efficacy of the Bollgard Gene in Transgenic Cotton Lines Against Bollworm and Tobacco Budworm, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 433-434
Author(s):  
J.H. Benedict ◽  
D.R. Ring ◽  
J.C. Correa ◽  
R.E. Buehler ◽  
E.M. Johnson ◽  
...  
Keyword(s):  
Insect Pests ◽  
Boll Weevil ◽  
Transgenic Cotton ◽  
Tobacco Budworm ◽  
Corpus Christi ◽  
Lepidopteran Pests ◽  
Control Target ◽  
Main Plot ◽  
Field Plots ◽  
Cotton Fleahopper

Abstract Transgenic cotton lines expressing an insecticidal protein produced by the crylA(c) gene (i.e., BoUgard Gene), or cryllA gene (Monsanto Co.) from Bacillus thuringiensis kurstaki, and the nontransgenic parent line Coker 312 (COK 312), were planted 25 Apr 1995 near Corpus Christi, Texas. Field plots were 4 row (38 inch centers) X 30 ft. Treatments (i.e., cotton lines) were arranged in a split plot RCB and each plot replicated 6 times. The main plot was lepidopteran control (i.e., with or without lepidopteran sprays of Karate (0.03 lb[AI]/acre) to suppress tobacco budworm, bollworm and other lepidopteran pests) and subplots were 6 cotton lines. Plots for lepidopteran suppression were sprayed on 6, 14, 21, 28 Jul with Karate using a backpack, CO2 powered sprayer and a 2 row handheld spray boom. The entire test was planted with in-furrow insecticide and oversprayed as needed for inseason control of insect pests such as thrips, aphids, boll weevil and cotton fleahopper. Efficacy of transgenic cottons to control target lepidopteran pests was determined by examining 20 flower buds and 20 capsules per plot on 5, 12, 19, 26 Jul for bollworm-tobacco budworm feeding injury, and taking lint yields per plot. Supplemental soil moisture was provided by sprinkler and furrow irrigation during the season but not within 48 h following a lepidopteran control spray. The plots were hand-harvested (13 ft 9 inches from middle 2 rows) and seedcotton ginned on a laboratory 10-saw gin.

The Status of Boll Weevil Resistance to Chlorinated Hydrocarbon Insecticides in Texas1

1962 ◽  
Vol 55 (6) ◽  
pp. 941-944 ◽  
Author(s):  
J. R. Brazzel ◽  
O. E. Shipp
Keyword(s):  
Boll Weevil ◽  
Chlorinated Hydrocarbon ◽  
The Status

Control of Cabbage Loopers on Cotton with Boll Weevil and Bollworm Insecticides in Central Texas in 19561

1957 ◽  
Vol 50 (5) ◽  
pp. 666-668 ◽  
Author(s):  
C. R. Parencia ◽  
C. B. Cowan ◽  
J. W. Davis
Keyword(s):  
Boll Weevil ◽  
Central Texas

Control of Thrips and the Cotton Fleahopper with Sprays in Central Texas in 19571

1958 ◽  
Vol 51 (4) ◽  
pp. 489-490 ◽  
Author(s):  
J. W Davis ◽  
C. R Parencia ◽  
C. B Cowan
Keyword(s):  
Central Texas ◽  
Cotton Fleahopper

Control of the Boll Weevil and Bollworm with Chlorinated Hydrocarbon and Phosphorus Insecticides in 19561

1957 ◽  
Vol 50 (5) ◽  
pp. 663-666 ◽  
Author(s):  
C. B. Cowan ◽  
J. W. Davis ◽  
C. R. Parencia
Keyword(s):  
Boll Weevil ◽  
Chlorinated Hydrocarbon

scholarly journals Efficacy Of The Bollgard Gene In Transgenic Cotton Lines Against Bollworm And Tobacco Bud-Worm, 1994

1997 ◽  
Vol 22 (1) ◽  
pp. 432-433
Author(s):  
J.H. Benedict ◽  
D.R. Ring ◽  
J.C. Correa ◽  
R.E. Buehler ◽  
E.M. Johnson ◽  
...  
Keyword(s):  
Insect Pests ◽  
Sprinkler Irrigation ◽  
Boll Weevil ◽  
Transgenic Cotton ◽  
Tobacco Budworm ◽  
Corpus Christi ◽  
Lepidopteran Pests ◽  
Main Plot ◽  
Field Plots ◽  
Cotton Fleahopper

Abstract Efficacy Of The Bollgard Gene In Transgenic Cotton Lines Against Bollworm And Tobacco Bud-Worm, 1994 Transgenic cotton lines expressing an insecticidal protein produced by the cryIA(c) gene (i.e., Bollgard Gene), or cryllA gene (Monsanto Co.) from Bacillus thuringiensis kurstaki and the nontransgenic parent line Coker 312, were planted 25 Apr near Corpus Christi, Texas. Field plots were 4 row (38 inch centers) X 30 ft. Treatments (i.e., cotton lines) were arranged in a split plot RCBD and each plot replicated 6 times. The main plot was lep-idopteran control (i.e., unsprayed or sprayed with Karate (0.03 lb[AI]/acre to suppress tobacco budworm, bollworm and other lepidopteran pests) and sub-plots were 8 cotton lines. Plots for lepidopteran suppression (with a conventional foliar insecticide) were sprayed on 29 Jun, 6, 14, and 20 Jul with Karate using a backpackCO2 powered sprayer and a 2-row handheld spray boom. The entire test was planted with in-furrow insecticide and oversprayed as needed in-season control of insect pests such as thrips, aphids, boll weevil and cotton fleahopper. Efficacy of transgenic cottons against target lepidopteran pests was determined by examining 20 flower buds and 20 bolls per plot on 28 Jun, 5, 12, and 19 Jul for bollworm-tobacco budworm feeding injury, and taking lint yields per plot. Supplemental soil moisture was provided by sprinkler irrigation during the season but not within 48-h following a lepidopteran con-trol application. The plots were hand-harvested (20 ft from middle 2 rows) and seedcotton ginned on a laboratory 10-saw gin.

Architecture of Radiolitid Rudist (Mollusca) Shell-Wall Structures and its Phylogenetic Implications

1975 ◽  
Vol 33 ◽  
pp. 686-687
Author(s):  
David H. Sturm ◽  
Bob F. Perkins
Keyword(s):  
Phylogenetic Relationships ◽  
Outer Wall ◽  
Shell Microstructure ◽  
Shell Wall ◽  
Wall Structures ◽  
Phylogenetic Implications ◽  
Cellular Wall ◽  
Superfamily Analysis ◽  
Central Texas

Each of the seven families of rudists (Mollusca, Bivalvia, Hippuritacea) is characterized by distinctive shell-wall architectures which reflect phylogenetic relationships within the superfamily. Analysis of the complex, calcareous, cellular wall of the attached valve of the radiolite rudist Eoradiolites davidsoni (Hill) from the Comanche Cretaceous of Central Texas indicates that its wall architecture is an elaboration of the simpler monopleurid rudist wall and supports possible radiolite-monopleurid relationships.Several well-preserved specimens of E. davidsoni were sectioned, polished, etched, and carbon and gold coated for SEM examination. Maximum shell microstructure detail was displayed by etching with a 0.7% HC1 solution from 80 to 100 seconds.The shell of E. davidsoni comprises a large, thick-walled, conical, attached valve (AV) and a small, very thin, operculate, free valve (FV) (Fig. 1a). The AV shell is two-layered with a thin inner wall, in which original structures are usually obliterated by recrystallization, and a thick, cellular, outer wall.

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