1 research outputs found
Efficient Control of Rhizoctonia solani Using Environmentally Friendly pH-Responsive Tannic Acid–Rosin Nano-Microcapsules
A nanomicrocapsule system was constructed
through the
polymerization
of tannic acid (TA) and emulsifier OP-10 (OP-10), followed by the
chelation of iron ions, to develop a safe and effective method for
controlling Rhizoctonia solani in agriculture.
The encapsulated active component is a rosin-based triazole derivative
(RTD) previously synthesized by our research group (RTD@OP10-TA-Fe).
The encapsulation efficiency of the nanomicrocapsules is 82.39%, with
an effective compound loading capacity of 96.49%. Through the encapsulation
of the RTD via nanomicrocapsules, we improved its water solubility,
optimized its stability, and increased its adhesion to the leaf surface.
Under acidic conditions (pH = 5.0), the release rate of nanomicrocapsules
at 96 h is 96.31 ± 0.8%, which is 2.04 times higher than the
release rate under normal conditions (pH = 7.0). Additionally, the
results of in vitro and in vivo antifungal
assays indicate that compared with the original compound, the nanomicrocapsules
exhibit superior antifungal activity (EC50 values of RTD
and RTD@OP10-TA-Fe are 1.237 and 0.860 mg/L, respectively). The results
of field efficacy trials indicate that compared with RTD, RTD@OP10-TA-Fe
exhibits a more prolonged period of effectiveness. Even after 3 weeks,
the antifungal rate of RTD@OP10-TA-Fe remains at 40%, whereas RTD,
owing to degradation, shows an antifungal rate of 11.11% during the
same period. Furthermore, safety assessment results indicate that
compared with the control, RTD@OP10-TA-Fe has almost no impact on
the growth of rice seedlings and exhibits low toxicity to zebrafish.
This study provides valuable insights into controlling R. solani and enhancing the compound performance