an example of farm to table participatory learning in potato
Participatory Research Developing relevant agricultural technology and innovation within farming systems using an egalitarian approach with all community members involved A simple, understandable, progression that begins with what people already know, their experiences, concerns, knowledge and beliefs, toward what they need to know in order to innovate successfully. Roland Bunch A way of learning together
Spring Hill Farm: Albany Gathering Together Farm: Philomath Foundhorn Gardens: Days Creek Fry Family Farm: Talent Sauvie Island Organics: Portland 47th Ave Farm: Portland Persephone Farm: Lebanon Blue Fox Farm: Applegate Fields Farm: Bend Winter Green Farm: Noti Ralph’s Greenhouse: Mount Vernon, WA
Copper fungicides are protectants, so they must be applied to the foliage before infection. The copper ion is absorbed by the germinating spore, and the copper denatures spore proteins.
Coppers must be applied regularly throughout the potato production season – this can be 8 or more sprays per season!
Coppers are considered synthetics by the NOP and are permitted with restrictions – they must be applied in a manner that minimizes accumulation in soil.
BlightMOP effectively controlled LB with 6 sprays of 0.9 lbs/A each as oxychloride, and this total application rate (5.4 lbs Cu per A) fell within the more restrictive EU guidelines (6 kg/ha, or 5.4 lbs/A) and did not result in increased soil Cu contents.
In the OSU trial, we made 4 applications of 1.9 lbs elemental copper as cupric oxide (Nordox) (total Cu application: 7.6 lbs Cu/A). It is possible that Nordox could be effective at 0.9 lbs elemental copper/A per spray. Monterey Chemical is currently trialing lower Nordox rates.
1 Cuprofix is not currently OMRI or WSDA listed for use on certified organic farms 2 Kocide 3000 was OMRI-listed in October 2006 but may no longer be listed. 3 Nordox is currently listed by OMRI and WSDA for use on certified organic farms. It is regulated and must be used in a manner that minimizes accumulation of copper in the soil [205.601( i )(1)] 4 Josephine Porter Institute for Applied Biodynamics, PO Box 133, Woolwine, VA 24185 Materials were applied as recommended by JPI. 5 Wilt Farms, Hwy 99W, Corvallis, OR. 541 752-0460. Tea was applied as received from Wilt Farm on dates that Wilt Farm produced tea. On 2 dates, tea was applied the following day. 8/21, 8/29, 9/1, 9/5, 9/12 600 gals/A 9. Wilt Farm tea (compost tea: Wilt Farm 5 ) 8/29, 9/3, 9/10, 9/17 600 gals/A 8. Water control (applied same dates as 1-7)) 8/29, 9/3, 9/10, 9/17 600 units/A 7. Maria Thun barrel compost tea (compost: BD Institute 4 ) 8/29, 9/3, 9/10, 9/17 300 units/A 6. Horsetail tea (horsetail: BD Institute 4 ) 8/30, 9/3, 9/10, 9/17 3 qts /A 5. Sonata (QST 713 Bacillus subtilis: Agraquest ) 8/30, 9/3, 9/10, 9/17 6 gals/A 4. Oxidate (hydrogen dioxide and peroxyacetic acid: BioSafe) 8/30, 9/3, 9/10, 9/17 2.5 lbs/A 3. Nordox 75 WG (copper oxide: Monterey Chemical) 3 8/30, 9/3, 9/10, 9/17 1.75 lbs/A 2. Kocide 3000 (copper hydroxide: DuPont) 2 8/30, 9/3, 9/10, 9/17 3 lbs/A 1. Cuprofix (copper sulfate: Cerexagri-Nisso) 1 Timing Rate Treatment
Wilt Farm tea 9 Water control 8 Maria Thun tea 7 Horsetail tea 6 Sonata 5 Oxidate 4 Nordox 3 Kocide 2 Cuprofix 1
Ambrosino, M. 2008. Flea Beetle Management for Organic Potatoes. Oregon State University. EM 8747-E.
Selman,L., N. Andrews, A. Stone, and A.Mosley. 2008. What’s Wrong with my Potato Tubers? Oregon State University. EM 8948-E.
Sullivan, D.M., J.P.G. McQueen and D.A. Horneck. 2008. Estimating Nitrogen Mineralization in Organic Potato Production. Oregon State University. EM 8949-E.
McQueen, J.P.G. 2007. Estimating the dry matter production, nitrogen requirements, and yield of organic farm-grown potatoes. M.S. Thesis. Oregon State University. Corvallis, OR. Available at: http://ir.library.oregonstate.edu/dspace/bitstream/1957/6245/1/mcqueenj_MSthesis.pdf ).