25 research outputs found
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms
No full textHydrophobic
surfaces modified by pathogens in agricultural production
are one of the main reasons to reduce the utilization of pesticides.
Adding surfactants to pesticide solutions is a common method to improve
their wetting and spreading properties. In this work, the interaction
mechanism between pathogen-modified hydrophobic surfaces and mixtures
of surfactants and a pesticide was studied in detail. The interaction
mechanism was determined by characterizing the wetting and spreading
behaviors of droplets on cucumber powdery mildew leaves at different
growth stages. When surfactants were added, droplets on cucumber powdery
mildew leaves were in the Wenzel wetting state, the pinning force
weakened, the contact line speed accelerated, and the adhesion force
increased. We explained the micellar state and aggregation behavior
of surfactant molecules in a pesticide solution that was applied to
the surface of cucumber powdery mildew leaves. Droplets of solutions
containing nonionic surfactants easily formed semibald micelles, binding
to the pathogen of powdery mildew, whereas droplets containing cationic
surfactants did not do so. Because of the electrostatic interaction
between cationic surfactant molecules and powdery mildew pathogens,
cationic surfactant molecules did not wet the pathogens very well,
so we suggest adding nonionic surfactants rather than cationic surfactants
to improve the wetting and spreading of pesticide solutions on cucumber
powdery mildew leaves. This study provides new insights into enhancing
the wetting and deposition of droplets on pathogen-modified hydrophobic
surfaces
Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms
No full textHydrophobic
surfaces modified by pathogens in agricultural production
are one of the main reasons to reduce the utilization of pesticides.
Adding surfactants to pesticide solutions is a common method to improve
their wetting and spreading properties. In this work, the interaction
mechanism between pathogen-modified hydrophobic surfaces and mixtures
of surfactants and a pesticide was studied in detail. The interaction
mechanism was determined by characterizing the wetting and spreading
behaviors of droplets on cucumber powdery mildew leaves at different
growth stages. When surfactants were added, droplets on cucumber powdery
mildew leaves were in the Wenzel wetting state, the pinning force
weakened, the contact line speed accelerated, and the adhesion force
increased. We explained the micellar state and aggregation behavior
of surfactant molecules in a pesticide solution that was applied to
the surface of cucumber powdery mildew leaves. Droplets of solutions
containing nonionic surfactants easily formed semibald micelles, binding
to the pathogen of powdery mildew, whereas droplets containing cationic
surfactants did not do so. Because of the electrostatic interaction
between cationic surfactant molecules and powdery mildew pathogens,
cationic surfactant molecules did not wet the pathogens very well,
so we suggest adding nonionic surfactants rather than cationic surfactants
to improve the wetting and spreading of pesticide solutions on cucumber
powdery mildew leaves. This study provides new insights into enhancing
the wetting and deposition of droplets on pathogen-modified hydrophobic
surfaces
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms
No full textHydrophobic
surfaces modified by pathogens in agricultural production
are one of the main reasons to reduce the utilization of pesticides.
Adding surfactants to pesticide solutions is a common method to improve
their wetting and spreading properties. In this work, the interaction
mechanism between pathogen-modified hydrophobic surfaces and mixtures
of surfactants and a pesticide was studied in detail. The interaction
mechanism was determined by characterizing the wetting and spreading
behaviors of droplets on cucumber powdery mildew leaves at different
growth stages. When surfactants were added, droplets on cucumber powdery
mildew leaves were in the Wenzel wetting state, the pinning force
weakened, the contact line speed accelerated, and the adhesion force
increased. We explained the micellar state and aggregation behavior
of surfactant molecules in a pesticide solution that was applied to
the surface of cucumber powdery mildew leaves. Droplets of solutions
containing nonionic surfactants easily formed semibald micelles, binding
to the pathogen of powdery mildew, whereas droplets containing cationic
surfactants did not do so. Because of the electrostatic interaction
between cationic surfactant molecules and powdery mildew pathogens,
cationic surfactant molecules did not wet the pathogens very well,
so we suggest adding nonionic surfactants rather than cationic surfactants
to improve the wetting and spreading of pesticide solutions on cucumber
powdery mildew leaves. This study provides new insights into enhancing
the wetting and deposition of droplets on pathogen-modified hydrophobic
surfaces
Optimization Strategy to Inhibit Droplets Rebound on Pathogen-Modified Hydrophobic Surfaces
No full textThe deposition and retention of pesticide
sprays on the surface
of hydrophobic plant leaves is a major agricultural challenge, and
the deposition of hydrophobic surfaces caused by plant leaf diseases
is also a major agricultural problem. Many recent studies have focused
on evaluating the effect of adding surfactants to water rather than
to pesticide solutions to increase the deposition and retention of
spray liquids. Here, we report a strategy to solve the problem of
deposition and retention by studying the impact of the behavior of
pesticide droplets with added surfactants and performing kinetic analysis
on cucumber leaves with powdery mildew. The reduction in the bounce
and splash of the pesticide droplets was analyzed by combining the
pinning site formed in the retraction stage and the viscous dissipation
in the rebound stage. In the practical application of the pesticide
spray, we can clearly see that the bounce, splash, and powdery mildew
spore ejection decreased when surfactants were added to the pesticide
spray that was used on the cucumber leaves, and the adhesion and retention
increased. The proposed comprehensive method is helpful for understanding
the interactions between pesticide spray droplets and the surface
of cucumber leaves with powdery mildew
