Considerations on Foliar Presentation Outline Applications and Volume of Pesticides review Considerations 573-634 mes Quinn Wayne Peterson Most veggie sprayers Parts of a hydraulic spraye ·Hydraulic 。Tank sprayers ·Agitato, ·Low pressure ·High pressure ·Pump 。Droplet size ·Gauge ·Fine-better ·Strainer coverage ·Pressure ·Large-better regulators penetration 。Hose Nozzles Air assist/air blast sprayers Regular flat-I&H,low p Flooding flat-common* Hollow cone-good p* Rain drop-p varies praPagteforlowvo Nozzle material- Brass ant amo Nylon -Hardened SS Greater risk of drift,esp.at high p1 Considerations on Foliar Applications and Volume of Pesticides James Quinn 573-634-2824; QuinnJa@missouri.edu & Wayne Peterson 660-783-0006; midwestgrower@sbcglobal.net Presentation Outline • Quick sprayer review • Discussion on some of the most common sprayers used with vegetable crops￾small & large • Checklist for operation and maintenance • Water volume for complete coverage Considerations • Systemic products vs contact • Impact of nozzle pressure • Two approaches for adjusting spray volume due to plant size • How much to apply given a range (e.g. 5 to 9 oz/acre Most veggie sprayers are. • Hydraulic sprayers • Low pressure • High pressure • Droplet size • Fine- better coverage • Large- better penetration Parts of a hydraulic sprayer • Tank • Agitator • Pump • Gauge • Strainer • Pressure regulators • Hose Nozzles • Regular flat- I&H, low p • Flooding flat- common* • Hollow cone- good p* • Rain drop- p varies • Nozzle material- – Brass – Stainless steel (SS) – Plastic – Nylon – Ceramic – Hardened SS * Greater risk of drift, esp. at high pressure Air assist/air blast sprayers • Fan aides distribution • Used in fruit production • Compatible for low volume spraying • Pros – Reduced runoff – Reduced use of pesticide and water • Cons – Need constant ground speed – Extra care for calibration – Application errors easier because less total gallonage applied