Effect of sprayer speed on spray drift
As the need for timely applications of crop protection products is more pronounced but farm sizes are growing the needed capacity for spraying is apart from increasing working widths more often managed by speeding up sprayers. This can be done as boom sprayers are more and more having good suspension systems that allow higher speeds in the field with minimal sprayer boom movements. However little is known on what the effect of sprayer speed is on spray drift. In a series of experiments the effect of sprayer speeds of 6 and 12 km/h is evaluated. The experiments are performed with two nozzle types; a standard flat fan (XR11004) and a low drift pre-orifice flat fan nozzle (DG11004), both sprayed at 3 bar pressure. These combinations were sprayed both with and without air assistance (Hardi Twin Force). Spray drift was measured to the soil surface next to a sprayed potato field. Also airborne drift at 5m distance from the edge of the field was measured. Results show an increase in spray drift with increasing speed. The effect of the low drift nozzle could not compensate for the increase in spray drift because of the increase in sprayer speed. The drift reduction because of the use of nozzle type or air assistance decreased with increasing speeds. Drift reduction classification differs for different speeds.
| Main Authors: | , , , |
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| Format: | Article/Letter to editor biblioteca |
| Language: | English |
| Subjects: | air assistance, boom sprayer, driving speed, nozzle-type, spray drift, |
| Online Access: | https://research.wur.nl/en/publications/effect-of-sprayer-speed-on-spray-drift-3 |
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| Summary: | As the need for timely applications of crop protection products is more pronounced but farm sizes are growing the needed capacity for spraying is apart from increasing working widths more often managed by speeding up sprayers. This can be done as boom sprayers are more and more having good suspension systems that allow higher speeds in the field with minimal sprayer boom movements. However little is known on what the effect of sprayer speed is on spray drift. In a series of experiments the effect of sprayer speeds of 6 and 12 km/h is evaluated. The experiments are performed with two nozzle types; a standard flat fan (XR11004) and a low drift pre-orifice flat fan nozzle (DG11004), both sprayed at 3 bar pressure. These combinations were sprayed both with and without air assistance (Hardi Twin Force). Spray drift was measured to the soil surface next to a sprayed potato field. Also airborne drift at 5m distance from the edge of the field was measured. Results show an increase in spray drift with increasing speed. The effect of the low drift nozzle could not compensate for the increase in spray drift because of the increase in sprayer speed. The drift reduction because of the use of nozzle type or air assistance decreased with increasing speeds. Drift reduction classification differs for different speeds. |
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