The possibility of use of polyhydroxyalkanoates (PHAs), biodegradable microbial polyesters, as a carrier for pesticides (alpha-hexachlorocyclohexane and lindane) for targeted and controlled delivery of these compounds to soil was investigated. The kinetics of polymer degradation and the dynamics of pesticide release from the extended-release formulations was studied. It is shown that pesticides embedded in a degradable polymer (PHA) carrier are released gradually and slowly, without surges, as the polymer is degraded by the soil microflora. The microbial soil component actively responded to the addition of the polymer as an additional nutrient substrate: the latter was degraded and then utilized. The rate of the pesticide release to the soil can be regulated by varying the polymer-pesticide ratio.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Controlled Release of Hydrophilic Drug from Hollow Nanodots.
Small
January 2025
Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand.
Here the challenge of limited encapsulation efficiency of ionizable hydrophilic molecules in silica materials is addressed. Two effective strategies are showcased that allow high encapsulation efficiency of salicylic acid, while simultaneously maintaining the morphology and particle size of silica nanocapsules. These promising approaches involve the formation and encapsulation of a prodrug or the complexation of the hydrophilic payload with a hydrophobic moiety to form a complex that is dissociated in acidic conditions.
View Article and Find Full Text PDFNanoscale Metal-Organic Frameworks for the Co-Delivery of Cycloxaprid and Pooled siRNAs to Enhance Control Efficacy in .
J Agric Food Chem
January 2025
China-Kenya Joint Laboratory for Ecological Pest Control of Citrus, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Biopesticide and Chemical Biology, MOE, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
RNA pesticides have emerged as a promising alternative to conventional chemical pesticides due to their high specificity and minimal environmental impact. However, the instability of RNA molecules in the environment and the challenges associated with their effective delivery to target pests limit their broader application. This study addresses these challenges by developing a dual delivery system using chitosan (CS) and Metal-Organic Frameworks (MOFs) to enhance the delivery and efficacy of double-stranded RNA (dsRNA) and cycloxaprid against , a vector of citrus greening disease.
View Article and Find Full Text PDFA simple approach to fabricate chitosan-delivered avermectin controlled release microparticles for improved efficacy and reduced residues.
Int J Biol Macromol
January 2025
College of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266109, Shandong, PR China. Electronic address:
The presence of a synergistic effect between carrier and insecticide in controlled release formulations is highly desirable to improve efficacy to target pests and reduce insecticide use. Herein, controlled release microparticles of avermectin (AVM) were fabricated using natural chitosan (CTS) as a carrier by a pH adjustment method. The resulted AVM@CTS microparticles displayed high encapsulation efficiency (73.
View Article and Find Full Text PDFDifferential infection dynamics in mononuclear and polymorphonuclear cells during Salmonella Typhimurium infection and in vitro exposure to diazoxon.
Microb Pathog
January 2025
Laboratorio Nacional para la Investigación en Inocuidad Alimentaria (LANIIA)-Nayarit, Universidad Autónoma de Nayarit, Tepic 63173, Nayarit, México; Licenciatura en Biomedicina Ambiental Traslacional, Universidad Autónoma de Nayarit, Circuito C. Ney M. González, Ciudad del conocimiento, 63173 Tepic, Nay. México.
S. Typhimurium bacteria cause one of the most recurrent gastrointestinal diseases worldwide. This bacterium can settle in the gastrointestinal tract and internalize into different cellular strains, causing the formation of cellular reservoirs that subsequently lead to systemic dissemination.
View Article and Find Full Text PDFDevelopment of morphology-dependent nanoselenium carriers for enhancing biological activity and reducing plant stress.
Ecotoxicol Environ Saf
January 2025
Department of Plant and Environmental Health, Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China. Electronic address:
Owing to their small size, morphology and release modification properties, nanopesticides are considered promising alternative strategies for enhancing biological activity and minimizing pesticide losses. In this study, we used a colloidal self-assembly method to develop a morphology-stable, regularly rod-shaped nanoselenium pesticide carrier (NSer), which was further modified with chitosan. After loading penthiopyrad (PEN), the biological activity of NSer@PEN and its impact on the physiological and biochemical processes of plants were further compared with those of spherical nanoselenium pesticides (NSes@PEN) and commercial materials (20 % PEN SC).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!