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This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

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Pyrethroid and endosulfan mixtures applied at full and reduced rates with three application methods (air-assisted electrostatic, air-assisted hydraulic, and standard hydraulic sprayers) were evaluated in field studies in 1992 and 1993 for control of sweetpotato whitefly, Bemisia tabaci-strain B (Genn.), also known as silverleaf whitefly, Bemisia argentifolii Bellows and Perring, and spray deposition on caulker, Brassica oleracea L. Based on adult suppression, improved control of whiteflies was achieved with full and reduced rates of the air-assisted electrostatic sprayer following two applications in 1992, but percent reduction of adults did not differ significantly among the application methods when full rates of insecticide were applied in 1993. Control based on immature colonization indicated that the air-assisted electrostatic sprayer was the only spray method to significantly reduce nymph densities when compared with the control in 1992, but differences in numbers of eggs, nymphs and eclosed pupal cases varied among application methods and rates of active ingredient in 1993. Comparisons of cauliflower harvest dates indicated that the air -assisted electrostatic sprayer did not provide significantly better control than the other application methods when used at similar rates. Spray deposition with the air-assisted electrostatic application technique was variable throughout these studies with no clear trends being observed. Our results suggest the air-assisted electrostatic sprayer may offer a means to control sweetpotato whitefly with a 50% reduction in insecticide usage.

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project. / 1. A Coordinated Research Effort Toward Insect Control 2. Biology and Control of Insects Affecting Cotton in Arizona 3. Precision Placement of Systemic Insecticides 4. Thimet and Disyston Give Good Systemic Control of Insects on Seedling Cotton 5. Ecological Factors Affecting the Abundance and Cultural Control of the Pink Bollworm 6. Insect Parasites and Predators of Insect Pests of Arizona Crops 7. Evaluation and Augmentation of Biological Control Agents to Replace or Supplement the Use of Pesticides 8. Boll Weevil Investigations 9. Laboratory Insecticide Tests 10. Systemic Insecticide Tests Against Lygis Bugs 11. The Effect of Gossypol on Larval Development 12. The Effect of Temperature on Development of the Immature Stages of Lygus herperus Knight 13. Pesticide Research Projects 14. The Total Fate of Some Polychloro Alicyclic Insecticides in Plants Under Controlled Conditions 15. Pesticide Residues on Arizona Crops 16. Pesticide Application Equipment in Relation to Drift of Pesticides and Pest Control 17. Pesticide Resides -- Their Nature, Distribution, and Persistence in Plants, Animals, and Soils

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