Some herbicidal chemicals are in the form of ionic salts as applied. These can be readily leached deep into the soil and/or lost to run-off during heavy precipitation resulting in reduced weed control and shorter residual activity. A novel complex nanoparticle fabricated from fumed silica and cationic surfactants has been developed as a delivery system for anionic agricultural chemicals. These particles are easily formed and can be applied through typical spray technology. Results have shown that these can be highly effective substrates for adsorbing some anionic herbicides. Example formulations have demonstrated improved off-site movement and increased residual weed control.

Complex nanoparticles for delivering crop protection agents

2019 Fall National Meeting

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