Hi, As travel speeds increase, this may increase turbulence, increasing potential for drift, you also may not like the coverage you get. Sounds like Nick has older plantings and newer high density, so a slower speed may be needed on the older trees. We completed spray coverage analysis with water sensitive cards last year in a tall-spindle orchard that was being sprayed at 4mph and every-other-row. Results showed variable coverage on the row being sprayed and no coverage on the opposite row, especially on the back sides of the leaves.
Dr. Andrew Landers, Cornell, discusses the role of travel speed and fan speed to achieve spray penetration and coverage in his book, "Effective Vineyard Spraying A Practical Guide for Growers". This resource should be on everyone's shelf. Thanks, Peter ============================= Peter Werts Project Coordinator Specialty Crop IPM IPM Institute of North America, Inc. 4510 Regent St. Madison WI 53705 Office: 608 232-1410 Cell: 612 518-0319 Fax: 608 232-1440 pwe...@ipminstitute.org www.ipminstitute.org -----Original Message----- From: apple-crop-boun...@virtualorchard.net [mailto:apple-crop-boun...@virtualorchard.net] On Behalf Of Vincent Philion Sent: Friday, June 06, 2014 8:07 AM To: Apple-Crop Subject: Re: [apple-crop] Sprayer Calibration Between Training Styles Hi! > adjusted the gear speed so the GPA would match the free standing > block, tractor speed was way too fast ~4 MPH. Why is 4MPH (6,5km/h) too fast? hills? it's quite common to have forward speeds of 7,3km/h in tall spindle (4,5MPH) Vincent Philion IRDA _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop