Low-drift nozzles vs. standard nozzles for pesticide application in the biological efficacy trials of pesticides in apple pest and disease control

Doruchowski, G.; Swiechowski, W.; Masny, S.; Maciesiak, A.; Tartanus, Małgorzata; Bryk, H.; Holownicki, R.

doi:10.1016/j.scitotenv.2016.09.200

Cited by 47 publications

(24 citation statements)

References 9 publications

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“…Although some literature data supported the thesis that air induction nozzles would result in reduced spray coverage and chemical efficacy when fungicide was applied, lately it was demonstrated that, when impacting with targets, the air‐filled droplets tended to explode and fracture into many smaller droplets, increasing the potential for spreading on the leaves, and producing similar, or even greater coverage and deposition compared to conventional, finer sprays. Furthermore, several studies confirmed the equivalent biological efficacy of treatments performed in apple orchards using AI and conventional nozzles . The AI nozzles showed the best performance in terms of coverage and biological efficacy when applying pesticides during unfavorable weather conditions (high wind, low humidity and high temperature), where conventional nozzles resulted in suboptimal performance…”

Section: Introductionmentioning

confidence: 84%

“…When operating with hydraulic nozzles, the main available strategy to reduce spray drift is the use of air induction nozzles, which proved to substantially reduce the spray drift, compared to conventional nozzles, by maintaining similar deposition values and, in this way, ensuring consistency in the biological efficacy of treatments . On the other hand, to date no innovative environmentally friendly commercial solutions are available for pneumatic sprayers on the market.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the influence of air speed and liquid flow rate on the droplet size and homogeneity in pneumatic spraying

Balsari

Grella

Marucco

et al. 2018

Pest Management Science

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Assessing the influence of air speed and liquid flow rate on the droplet size and homogeneity in pneumatic spraying

Balsari

Grella

Marucco

et al. 2018

Pest Management Science

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“…The most commonly used method in China for applying pesticides is hydraulic pressure atomization. This approach often causes uncovered soil under trees to be exposed to pesticides [38]. To investigate the residue levels of these frequently used pesticides in apple orchards, 14 surface soil samples (S1-S14) were randomly collected and analyzed by the developed method (Table 5).…”

Section: Application In Real Samplesmentioning

confidence: 99%

Detection of Frequently Used Pesticides in Apple Orchard Soil in China by High Resolution Mass Spectrometry

Shi

Chen

et al. 2020

Pol. J. Environ. Stud.

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In this study, 10 frequently used pesticides in apple orchards from the major apple production area of China were identified through 150 questionnaires. Based on Orbitrap high-resolution mass spectrometry, a method for detecting these pesticides in soils was developed. Typically, these compounds can be extracted from dry soil samples using dichloromethane: acetone (2:1, v:v) and purified by dispersive solid-phase extraction (PSA and C18). The qualitative and quantitative analyses can be undertaken by monitoring the MS1 precursor ions under full scan mode within a mass error of <5 ppm (resolution 120000). The recoveries ranged from 68.4% to 102.4% (SD<10.5%), the matrix effects induced signal fluctuation was less than 10%, and the intra-and inter-day precisions were all below 5%. For 14 surface soil samples randomly collected from an apple orchard in China, most pesticides presented the highest detection frequencies (100%), with imidacloprid and tebuconazole showing the highest residue levels (4.1-39.1 and 9.8-350.2 ng/g dry weight, respectively). Compared with previous methods for analyzing individual or several pesticides, the proposed method represents a promising means of investigating these frequently used pesticide residues in apple orchards in China.

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“…One major standard of high-efficiency pesticide application technology is that pesticide deposition on the target is far higher than that for other target objects or regions. This increased deposition increases the utilisation of pesticides to a maximum extent and is an important way to eliminate damages of pesticides on operators and relieve environmental pollution [1] [2] [3]. Nowadays, China mainly depends on the mechanical spraying of pesticides.…”

Section: Introductionmentioning

confidence: 99%

Effects of Liquid Viscosity on Agricultural Nozzle Droplet Parameters

Zhang¹,

Song²,

Sun³

et al. 2019

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To discuss the effects of pesticide viscosity on the atomisation characteristics of an agricultural nozzle, glycerite with different mass fractions was prepared to replace the pesticide. First, the atomisation region of the nozzle was meshed and sized. Second, the speed and kinetic energy of the droplets at different positions in the atomisation region were measured by Phase Doppler Anemometry. The results demonstrated that the Sauter mean diameter, volume mean diameter and arithmetic mean diameter of droplets first decreased and then increased gradually in the axial direction of the atomisation region. Surface waves of a certain pattern were formed on the liquid surface, which was ejected by the disturbance of external air resistance. As the distance increased, the amplitude increased and the wave crest was broken into small droplets. These droplets then collided and agglomerated into large droplets under the effect of gravity. Droplets had an approximately symmetric distribution on the radial direction of the atomisation region, and the droplets were small in the middle and large at the two ends. The droplet size was positively related to the radial distance. Compared with the droplet speed at the two ends, the droplet speed at the axis was higher and the droplet size was smaller. Moreover, the kinetic energy of the droplets along the axial direction decreased sharply and then increased slowly. Droplets with high viscosity at the near end of the nozzle had small kinetic energy, and the effects of liquid viscosity on the atomisation characteristics of a nozzle could not be neglected. The droplet kinetic energy slightly increased at the far end.

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Low-drift nozzles vs. standard nozzles for pesticide application in the biological efficacy trials of pesticides in apple pest and disease control

Cited by 47 publications

References 9 publications

Assessing the influence of air speed and liquid flow rate on the droplet size and homogeneity in pneumatic spraying

Assessing the influence of air speed and liquid flow rate on the droplet size and homogeneity in pneumatic spraying

Detection of Frequently Used Pesticides in Apple Orchard Soil in China by High Resolution Mass Spectrometry

Effects of Liquid Viscosity on Agricultural Nozzle Droplet Parameters

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