Study On The Relationship Between The Properties Of Spray Liquid And The Utilization Rate Of Pesticide

At present,there have been a large number of reports on the effects of different plant protection machinery and spray liquids on pesticide deposition,but different dosage forms with the same content of the same active ingredient and whether spraying after adding different additives to the same active ingredient liquid has an effect on the physical and chemical properties of the liquid,Anti-drift performance and the positive impact of the deposition distribution and utilization rate on target crops have not been reported systematically.This article self-made 25% pyraclostrobin EC,SC,WP,WG,ME5 kinds of formulations,selected five kinds of spray additives,Bei Datong,Maifei,SP133,408,fusion,according to the main ingredients are classified into vegetable oil,Mineral oils,high molecular polymers,silicones,non-ionic surfactants.Through the study of different pesticide formulations with the same active ingredients and the addition of different spray auxiliaries to the surface tension of the liquid,the contact angle on the wheat leaves,the adhesion tension and the adhesion work,the droplet size distribution,the droplet drift performance,and the effect of the spray on the wheat canopy The layer deposition distribution and the influence of pesticide deposition utilization rate,analyze and summarize the relationship between spray chemical liquid properties and pesticide deposition utilization rate.The conclusions of this study are as follows:1.Under 5 dilution multiples,the deposition amount and utilization rate of EC are higher,while those of SC are lower.The RS and the number of small droplets of EC are significantly lower than other dosage forms,and the particle size of the droplets is significantly higher than that of other dosage forms,and the drift and deposition of droplets of liquid medicine are the least.The contact angle of SC on wheat leaves was higher than that of the other four formulations,and it was not easy to wet the leaves.2.With the increase of the dilution factor,the deposition amount and deposition utilization rate of the five formulations of chemical solutions on wheat showed a decreasing trend,and the surface tension of the chemical solution and the contact angle on the wheat leaf showed an increasing trend.The adhesion tension,adhesion work and viscosity all showed a decreasing trend.3.Add vegetable oil additives,mineral oil additives,and surfactant additives to the EC and spray,and add vegetable oil additives,polymer additives,silicone additives,and surfactants to the SC.After spraying,the WP adds high molecular polymer additives,silicone additives,and surfactant additives to spray after spraying,which can increase the utilization rate of pesticide deposits.4.After the concentration of the liquid medicine increases or the addition of suitable spray additives,the surface tension and the contact angle on the wheat leaves are reduced,the adhesion tension,adhesion work,and viscosity of the liquid medicine increase,and the number of small droplets decreases.The droplet size increases,thereby increasing the wetting and spreading of the liquid medicine on the target crop,reducing evaporation and drift,and ultimately reducing the loss of pesticides and improving the utilization rate of deposition.In summary,this article studied the effects of different pesticide formulations and the addition of different spray auxiliaries on the surface tension of the liquid,the contact angle on the wheat leaf,the adhesion tension and the adhesion work,the droplet size distribution,the droplet migration performance and the The canopy deposition distribution and the influence of pesticide deposition utilization rate,the relationship between the spray chemical properties and the pesticide deposition utilization rate was obtained,and the application combination of 25% pyraclostrobin with different formulations and spray additives was proposed in order to be the pesticide formulation and The selection of spray additives can improve the deposition distribution and utilization rate of plant protection mechanical spray on crops,and provide theoretical support and technical guidance for reducing pesticide application and increasing efficiency.