| Autor: |
Aguila-López, Josefina, Flores-González, Maribel, Sánchez-Rivera, Marisel, Díaz-Reyes, Joel, Sánchez-González, Noe, Sánchez-Ramírez, José Francisco |
| Zdroj: |
Biocontrol Science & Technology; Jan2025, Vol. 35 Issue 1, p88-104, 17p |
| Abstrakt: |
Streptomyces sp. herbicidal metabolite encapsulation with controlled release properties is considered an innovative method for weed control without negatively affecting the environment. This research reports the preparation and application of new herbicidal metabolites-core/alginate-shell encapsulation systems with controlled release properties of Streptomyces sp. metabolites with pre-plant herbicidal activity for the control of weeds, Lolium perenne, Amaranthus retroflexus and Bidens pilosa showing good germination inhibition capacity. The production of Streptomyces sp. metabolites was performed by the liquid fermentation method. Three alginate polymer-coated Streptomyces sp. herbicidal metabolites-controlled release systems with an encapsulation efficiency of > 94%, were successfully prepared using the dripping extrusion method. Well-defined and compact release systems were obtained with a spherical shape and average diameters of 4.4-4.5 mm and an alginate shell thickness in the order of 400 µm with different pore sizes (26-5 µm). An increase in the alginate concentration of 0.75-2.0% (w/v) during the preparation resulted in a decrease in the shells' porosity size and a decrease in the release of the Streptomyces sp. herbicidal metabolites. The release activity of the herbicidal metabolites was evaluated by UV-Vis optical absorption spectroscopy. The statistical results showed that porous shell release systems with a lower release rate over time have a higher potential for the inhibition of germination in > 91% of weeds than the direct herbicidal metabolite application and the control group (P < 0.05). These results indicate that Streptomyces sp. herbicidal metabolites-controlled release systems represent a potentially sustainable alternative for pre-plant weed management. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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