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VINEYARD COOLING STUDY

VINEYARD COOLING STUDY. MATT LAMBORN Pacific Geodata , LLC / Lamborn Family Vineyards TOWLE MERRITT Walsh Vineyards Management. STUDY PARTICIPANTS & SPONSORS Diageo / Beaulieu Vineyard Walsh Vineyards Management Pacific Geodata Edwards Engineering Jain Irrigation Nelson Irrigation

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VINEYARD COOLING STUDY

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  1. VINEYARD COOLING STUDY MATT LAMBORN Pacific Geodata, LLC / Lamborn Family Vineyards TOWLE MERRITT Walsh Vineyards Management

  2. STUDY PARTICIPANTS & SPONSORS • Diageo / Beaulieu Vineyard • Walsh Vineyards Management • Pacific Geodata • Edwards Engineering • Jain Irrigation • Nelson Irrigation • Advanced Viticulture • Fruitfly Wine Sciences • Vinquiry • Additional funding sponsors (Phases II/III) • Close Pegase • Cuvaison • Price Family Vineyards • Silverado Farming Company • Sonoma County Water Agency VINEYARD COOLING STUDY

  3. PURPOSE OF THE STUDY • Increase in mean temperatures / extreme heat events • Seeking to protect fruit / vines from heat • Minimize water use • Little to no formal research on vineyard cooling VINEYARD COOLING STUDY

  4. EFFECTS OF EXTREME HEAT ON VINES & FRUIT • Limited research on the subject, but a few common themes emerge: • ↑sunburn and dehydration • ↓ harvest weights • ↓ acids while ↑ pH • ↓ photosynthesis • ↓anthocyanins VINEYARD COOLING STUDY

  5. POTENTIAL BENEFITS OF VINEYARD COOLING • ↓ temperatures (air, leaf, fruit, and soil) • ↑ relative humidity • ↓ transpirationalstress • greateracid/pH balance • ↓ direct solar radiation while ↑ diffuse solar radiation (which enhances photosynthesis) through the use of misting or fogging microsprayers • Possible retention/balance of anthocyanins and other phenolics VINEYARD COOLING STUDY

  6. STUDY LOCATION • BV2 vineyard in Rutherford VINEYARD COOLING STUDY

  7. SPRAYERS • Tested numerous misters & microsprayers • Criteria for successful sprayer: • Pattern / size of spray relative to flow rate • Susceptibility to plugging • Chose a microsprayer from Jain Irrigation • Converted from a drip emitter • 1 GPH flow rate • Self-flushing & pressure compensating • Also looked at Nelson R5 pop-up sprayer • ~16’ spray radius VINEYARD COOLING STUDY

  8. COOLING SYSTEM DESIGN • Vineyard planted to CS in 1996 • 8’ x 8’ spacing, VSP • 3 test plot configurations: • Control (no cooling) • 2 microsprayers per vine above canopy • 1 Nelson R5 pop-up @ 16’ x 16’ • 2nd drip hose supplied water to sprayers • Sprayers connected to 2nd drip hose using spaghetti line • Microsprayer flow rate: 1,484 GPH/ac • Pop-up flow rate: 1,531 GPH/ac VINEYARD COOLING STUDY

  9. TEST PLOT LAYOUT VINEYARD COOLING STUDY

  10. TEMPERATURE MONITORING VINEYARD COOLING STUDY

  11. WHEN TO RUN THE SYSTEM? 30 28 26 24 22 Maximum 20 18 Minimum Number of events 16 14 Median 12 VINEYARD COOLING STUDY 10 8 6 4 2 0 90 91 92 93 94 95 96 97 98 99 100 º Trigger temperature ( F) 16.0 14.0 12.0 Maximum 10.0 Median Duration (hours) 8.0 6.0 4.0 2.0 0.0 90 91 92 93 94 95 96 97 98 99 100 º Trigger temperature ( F)

  12. COOLING SYSTEM OPERATION VINEYARD COOLING STUDY

  13. COOLING SYSTEM OPERATION • Nelson R5 Pop-Up • Jain Microsprayer VINEYARD COOLING STUDY

  14. COOLING RESULTS (2011) VINEYARD COOLING STUDY

  15. COOLING TREATMENTS REVIEW VINEYARD COOLING STUDY

  16. THANK YOU! PACIFIC GEODATA VINEYARD COOLING STUDY

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