Abstract Details
Abstract Title
BIODEGRADABLE POLYMERIC NANOPARTICLES AS PESTICIDE DELIVERY SYSTEMS: PESTICIDE EFFECTIVENESS AND NANOPARTICLE UPTAKE AND POTENTIAL ENVIRONMENTAL IMPACT
Abstract Text
Nanotechnology-enabled solutions are touted to control the release and/or targeting of the pesticide for improved efficacy of the pesticide leading to higher yields. Questions about the fate and potential environmental impact of the particles hamper immediate and widespread application of nanodelivery systems to agriculture. The overall goal of the project was to assess the effectiveness of polymeric nanoparticles designed for delivery of pesticides, and to develop the needed analytical strategy for the future evaluation of their environmental fate and impact. Polymeric particles in the nanometer size loaded with insecticide (methoxyfenozide) were synthesized and applied to soybean plants to determine their effectiveness against soybean looper (SBL), Chrysodeixis includens (Walker), fed treated leaves. Soybean plants were employed as a model to evaluate the effectiveness of the pesticide in the field. The mortality of insects fed loaded and unloaded nanoparticles was determined by using a diet-overlay bioassay. Zein particles measured 152±5 nm in diameter, were positively charged (108±7 mV zeta potential) and were stable over time. Unloaded nanoparticles did not affect SBL survivorship whereas nanoparticles loaded with methoxyfenozide caused quicker mortality, increasing as a function of concentration. Methoxyfenozide loaded in nanoparticles controlled SBL 28 days after treatment (DAT) whereas methoxyfenozide alone controlled SBL out to 21 DAT only. Thus, nanodelivered methoxyfenozide gave longer residual control. It is expected that the acquired data will provide the basis for understanding the effect of nanoparticles on the effectiveness of the delivered insecticide, and potential environmental fate and impact of a biodegradable nanoparticle system likely to be used in the future in agriculture
Author(s)
Cristina M., Sabliov ( presenting )
Biological & Agricultural Engineering, Louisiana State University, 141 E. B. Doran Bldg., Baton Rouge, LA 70808
J. A. , Davis
Entomology, 404 Life Sciences Building, Louisiana State University, Baton Rouge, LA 70808
C. E. , Astete
Biological & Agricultural Engineering, Louisiana State University, 141 E. B. Doran Bldg., Baton Rouge, LA 70808
I. , Neaga
Analytical Chemistry Department, “Iuliu Hatieganu” University of Medicine and Pharmacy, Louis Pasteur St., 400349, Cluj-Napoca, Romania
E. , Bodoki
Analytical Chemistry Department, “Iuliu Hatieganu” University of Medicine and Pharmacy, Louis Pasteur St., 400349, Cluj-Napoca, Romania
Presentation
Contribution proposed for:   oral presentation
   
   
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