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VeraiSon to harVeStStatewide Vineyard Crop deVelopment Update #7

oCtober 18, 2019edited by tim martinSon and ChriS GerlinG

Cindy Hanlon (left), Don Caldwell and Ellen Coyne (right) harvesting one of Hans Walter-Peterson’s Riesling trials on Seneca Lake this week.

Photo by Hans Walter-Peterson

Around New York...Statewide (Tim Martinson)At week 7 of Veraison to Harvest, 2/3 of our original 89 blocks we sample have been harvested. The weather has shifted, with significant rainfall late in the week.

For the cold-hardy Minnesota varieties (Frontenac, Fronte-nac gris, Marquette, and La Crescent), the only blocks left are in the Champlain region. Soluble solids on remaining blocks are running 1.4° brix lower than the (much earlier) harvest in 2018, and acids range from 10.6 (Marquette) to 15.3 g/L – 0 to 4 g/l higher than last year at harvest.

Of the traditional hybrids, only Traminette and Vidal blanc remain, with TAs comparable to last year’s numbers, but soluble solids ranging from 19.1 (Vidal blanc) to 21.8 (Tra-minette) – a gain of 1.4-1.9° brix from last week.

The two remaining Concord blocks and the Catawba block are ready for harvest at 16.2 and 16.6° brix, respectively.

Among the vinifera, most Chardonnay (except a long island and a Niagara block), all Pinot noir (except a Niagara county block), Gruner Veltliner, Lemberger, and Sauvignon blanc have been harvested. All Cabernet Franc blocks (except one Hudson Valley vineyard) are still hanging, with soluble sol-ids ranging from 19.6 to 22.1° brix and acids ranging from 4.0 to 9 g/l. A couple of blocks are lagging at 17-17.6 – a probable result of significant downy mildew activity. Long Island merlot is 4.2° brix ahead of last year (at 22.4° brix), and acids are on a par with last year’s numbers at 5.8 g/L.

Five Riesling blocks – all outside of the Finger Lakes (Hud-son valley, Lake Erie, and Long Island)– have been harvest-ed. All eight Finger Lakes blocks are remaining. Soluble solids seem to be stalled at roughly 18° brix, and acids are hovering around 9-10 g/L. Notably, soluble solids are run-ning slightly ahead of 2018, and acids are about 2 g/l higher than last year.

All signs point to harvest wrapping up in a week to 10 days.

Long Island (Alice Wise) Most businesses on Long Island are enjoying a good harvest season. It has not seemed as rushed as in previous seasons.

A review of some 2019’s highlights from Long Island.

Weather: Industry members have marveled at the good weather through most of the season, a refreshing change from previous seasons. September was especially nice, a bit cooler than 2018 and definitely a lot drier. We were very for-tunate to dodge all the tropical weather this year.

Viticulture: We elected not to use herbicides in the LIHREC (Long Island Horticultural Research and Extension Center) vineyard this year. Even on 2 acres, it was difficult to keep up with under-vine mowing and hand weeding (the mower is hard on baby vines). Hats off to the local vineyards that pull this off on 20, 50, even 100 acres. Chardonnay cl.4 again had some shriveled clusters – rachis remained green. This could possibly be classified as Sugar Accumulation Disorder, a phenomenon seen in NW vineyards. Causal factors are un-known. The LIHREC vineyard struggled with drought stress through September. Most affected were young vines, Merlot and Tocai Friulano, the poster child for drought stress in our vineyard. First time ever irrigating in September. Chardon-nay, Sauvignon Blanc and the Cabernets did well through the drought.

Disease: Surprise, downy mildew was a challenge in 2019. DM usually quiets down in dry weather but that no longer seems to be the case. We are somewhat hampered on Long Island as we have fewer registered fungicides. Despite some valiant efforts, keeping DM totally off of laterals and the top of the VSP canopy seemed impossible. Growers are increas-

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ingly frustrated with over-the-row nets as shoots are crunched up at the top and vines cannot be hedged. This allows DM to establish and thrive. Side netting is a big advantage in that regard.

There was widespread and intense expression of leaf roll virus symptoms in many blocks including ours. In one section of the LIHREC vineyard, leafroll continues to spread despite several years of MB treatments. Dis-appointing to say the least especially given the cost of treatment. We will be pulling out vines to try and limit the spread.

Thankfully, cluster rot was minimal this season. We did not see pre-veraison Botrytis infections, always an ominous sign. Damage from bird pecking was mini-mal. Bees and wasps did some damage but were fewer in number this year. The dry weather in August and September also kept things in check.

Finally, the disease tolerant hybrids did well. Currently we have Itasca, NY81 and Regent. They are treated like vinifera through fruit set to ward off black rot and pho-mopsis. From fruit set on, they had a minimal spray schedule and remained clean until September when a tiny bit of DM showed up in the top of the canopy. We are planting several new hybrids in 2020.

Insects: Grape mealybug continues to flourish in lo-cal vineyards. Treatment does help to reduce popula-tions; we were able to document this in scouted blocks. However, in the LIHREC vineyard, we found that even after a well-timed treatment in mid-June, GMB’s con-tinued to thrive at the very base of the trunks. This is important of course because GMB’s are implicated in the spread of leafroll virus.

More Japanese beetles were around this summer though they did not require treatment. There were some significant outbreaks of European red mite es-pecially in Merlot. This is a tough one – hard to gauge when/if populations will explode and miticides are expensive. There was moderate grape berry moth pressure through most of season. Later on, secondary clusters were completely and totally infested by GBM, which in turn led to some Botrytis. It was strange see-ing healthy, clean fruit in the fruiting zone of the VSP while the secondaries in the top of the canopy looked like a disaster. Finally and thankfully, there were not nearly as many fruit flies as in the past few seasons.

Ripening: Veraison started as per normal in early Au-gust. It proceeded slowly until about the 3rd week; the pace accelerated at that point. Reds that were some-what sluggish seem to fully develop color over a week-end. This season the date of harvest was not dictated by cluster rot or impending horrible weather. Sauvi-gnon Blanc fruit was gorgeous, clean, rich and ripe. Chardonnay developed that golden translucence of

very ripe fruit. For both varieties, clusters were on the large side. As of this writing, reds for rose are in, even a few blocks of Merlot and Malbec for table wine. A lot of Merlot and Cab Franc will make it to the crush pad over the next few weeks. The season will finish with Cab Sauvignon and Petit Verdot. We are very much looking forward to tasting the 2019 wines..

Finger Lakes (Hans Walter-Peterson)After a relatively warm and dry September, October is behaving more like - well, October. Temperatures have been closer to normal for this time of year, and rains have become a bit more frequent again. Fortunately, we continue to get dry air and some decent wind after these showers which helps to dry off the canopies and clusters fairly quickly, which has helped to keep bunch rots from becoming a major issue to this point.

Constellation Brands wrapped up their harvest on Wednesday this week, so most of the Concord in the region has been picked by this point, but some blocks destined for Welch’s tanks and a few other small win-eries are still hanging at this point.

We are also in the heart of harvest for Riesling right now. Looking back at sample results from 2018, sug-ar accumulation at our sampling locations is not too different from where it was at this point last year, but acidity is a bit higher on average. One of the main rea-sons for this is likely the differences in nighttime tem-peratures between the two years, with last year’s being about 4°F higher than this year’s.

We have also started to see some early Cabernet Franc picked this week, primarily for rosé production, in ad-dition to Lemberger and even some Merlot. We picked Corot Noir at the Teaching Vineyard this week, leaving Vidal as the only hybrid still hanging there.

There is a frost advisory for Saturday morning cover-ing much of the Finger Lakes region. With any luck, the lakes will do their job and keep the temperatures from dipping too low, but colder pockets and low spots in some vineyards may get cold enough to cause damage to the canopies and bring the ripening period for those vines to an end. Hopefully that’s not the case, as there’s still a little ways to go in order for this year’s harvest to be wrapped up..

Lake Erie (Jennifer Russo) Concord harvest is in full swing in our region. One industry representative reported that vineyard cano-pies are holding up well for this time of the year and sugars are averaging 16 °Brix, but there are reports of fruit shelling starting to come in. Other industry representatives reported that harvest ended fast and acid numbers never really reached where they had ex-pected. The seven-day weather forecast for CLEREL

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in Portland, NY calls for rain and breezy for part of the week and mostly sunny and clear the rest. Fingers crossed the fruit can hold onto the vine through the poor conditions.

Area processors are reporting finished Niagara harvest and Concord average sugar solids between 16.27-16.4 ° Brix. The seven-day forecast depicts a chance of pre-cipitation every day in the next seven days except for Sunday. The temperatures will be seasonal.

The past week’s weather for CLEREL as of 1:30 pm on Thursday, October 17th, had an average air temp of 53.3 °F, average max temperature of 62.2°F, which is 2.3 degrees lower on average than last week. The av-erage minimum temp of 45.4 °F was only 2.3 degrees lower than last week. The most precipitation occurred on October 16th, with 1.1 inches; recorded. rain can create havoc with deliveries to the processing plants..

Hudson/Champlain (Jim Meyers)

The moon drops one or two feathers into the field. The dark wheat listens.

Be still. Now.

There they are, the moon’s young, trying Their wings.

Between trees, a slender woman lifts up the lovely shadow Of her face, and now she steps into the air, now she is gone

Wholly, into the air. I stand alone by an elder tree, I do not dare breathe

Or move. I listen.

The wheat leans back toward its own darkness, And I lean toward mine.

-- James Wright, ‘Beginning’

GDD accumulation has essentially ended, leaving the GDD shortfall vs 2018 year-to-date as-is (Figures 1 & 2). As of today, Champlain Valley is the only region in eastern New York that still has Veraison to Harvest sampled fruit on the vine.

Figure 1. Difference in cumulative Growing Degree Days (GDDs) and pre-cipitation between 2019 and 2018 as of October 18th. Each colored circle represents a farm location. Local CCE offices are represented by colored squares.

Figure by Jim Meyers

Figure 2. Comparison of 2019 and historical cumulative Growing Degree Days (GDDs) in a representative vineyard from each of four sub-regions of eastern New York..

Figure by Jim Meyers

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Figure 3, comparing 2018 and 2019 Brix, indicates that all fruit from the sample blocks was harvested by this date last year.

The National Oceanic and Atmospheric Administra-tion (NOAA) 14-day temperature outlook is now pre-dicting normal temperatures. Figure 4 shows a seven day GDD forecast for representative vineyards from each of four sub-regions of eastern New York.

Figure 3. Comparison of 2019 and 2018 ripening at 13 vineyards in eastern New York. CV = Champlain Valley. HV = Hudson Valley. UHV = Upper Hudson Valley..

Figure by Jim Meyers

Figure 4. Seven day GDD forecast for representative vineyards from each of four sub-regions of eastern New York

Figure by Jim Meyers

Final 2019 Lake Erie Concord Berry Curve

(Terry Bates)The berry curve block at CLEREL was harvested this week, so this is the final berry curve for the Lake Erie region..

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Fruit Composition Report - 10/18/2019Samples were collected on Monday, October 14. Previous YAN measurements collected on Sept 30. Next sam-ples will be collected on Monday, October 21 .

Baco NoirRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Hudson Valley 9/16/2019 SW HV HARVEST Final sample 9/3/2019 Southwest HV 1.15 20.2 3.2 12.3Final Sample 9/10/2018 Southwest HV 1.18 18.4 3.38 11.0

Cabernet FrancRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 E. Seneca 1.32 22.3 3.08 8.4 40Finger Lakes 10/14/2019 W. Seneca 1.37 18.1 3.17 9.0 100Finger Lakes 10/14/2019 Cayuga 1.24 20.8 3.20 6.8 57Finger Lakes 10/14/2019 Dresden 1.23 22.2 3.09 7.3 46Finger Lakes 10/14/2019 Lansing 1.25 19.5 3.20 8.3 81Finger Lakes 10/14/2019 Keuka 1.26 21.1 3.14 8.2 57

Hudson Valley 10/14/2019 Southwest HV 1.46 21.9 3.51 4.9 111Hudson Valley 10/14/2019 East Central HV HARVEST 0

Lake Erie 10/14/2019 Portland 1.40 20.1 3.22 9.2 107Long Island 10/14/2019 1.91 22.7 3.54 5.4 95Long Island 10/14/2019 1.58 22.2 3.68 4.4 120

Niagara 10/14/2019 Niagara County 1.02 22.2 3.13 9.0 41Average 10/14/2019 1.37 21.2 3.27 7.4 71

Prev Sample 10/7/2019 1.37 20.1 3.28 7.3 93‘18 Sample 10/15/2018 1.64 19.4 3.38 6.0 161

CatawbaRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 Keuka 2.62 16.2 2.89 10.6 95Prev Sample 10/7/2019 Keuka 2.62 15.6 2.93 10.8

‘18 Final Sample 10/8/2018 Keuka 2.64 17.8 3.02 8.4

Cayuga WhiteRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/7/2019 Keuka HARVESTFinger Lakes 10/7/2019 Cayuga HARVESTFinger Lakes 10/7/2019 Dresden HARVESTFinger Lakes 10/7/2019 Ithaca HARVEST

’19 Final Sample 9/30/2019 2.16 19.4 2.99 10.0 123‘18 Final Sample 10/8/2018 3.19 19.7 3.33 7.0

ChardonnayRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 Cayuga HARVEST Finger Lakes 10/14/2019 W. Seneca HARVEST Finger Lakes 10/14/2019 Lansing HARVEST Long Island 10/14/2019 LI-03 1.83 22.0 3.49 6.3 152

Niagara 10/14/2019 Niagara County 1.66 21.9 3.13 8.3 73Finger Lakes 10/14/2019 Dresden HARVEST

Average 10/14/2019 1.74 22.0 3.31 7.3 112Prev sample 10/7/2019 1.61 19.6 3.25 7.8 113

‘18 Final Sample 10/8/2018 1.77 19.1 3.45 7.1

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ConcordRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 Keuka HARVESTFinger Lakes 10/14/2019 W. Canandaigua 3.10 17.0 3.31 5.2 157

Lake Erie 10/14/2019 Portland 3.10 16.3 3.37 7.8 304Average 10/14/2019 3.10 16.7 3.34 6.5 231

Prev. Sample 10/7/2019 3.14 16.1 3.29 6.1 128‘18 Sample 10/15/2018 2.77 16.8 3.10 6.4 181

Frontenac & Frontenac GrisRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Champlain Valley 10/7/2019 HARVEST Hudson Valley 10/7/2019 Northeast HV HARVEST

Lake Erie 10/7/2019 Sheridan HARVEST Champlain Valley 10/14/2019 1.17 22.7 2.92 16.4 329

Average 10/14/2019 1.17 22.7 2.92 16.4 329Prev Sample 10/7/2019 1.18 21.5 2.91 15.3 277

‘18 Final Sample 10/1/2018 1.21 24.0 3.08 12.6 194

Gruner VeltlinerRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 9/30/2019 Dresden HARVEST ’19 Final Sample 9/23/2019 Dresden 1.36 18.8 2.95 6.9 29‘18 Final Sample 9/17/2018 Dresden 1.79 20.3 3.33 5.5 133

La CrescentRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Champlain Valley 10/14/2019 HARVEST Champlain Valley 10/14/2019 Northern Champlain 1.28 19.3 2.95 12.4 124

Finger Lakes 10/14/2019 Geneva 1.39 21.7 3.07 12.8 145Hudson Valley 10/14/2019 Northwest HV HARVEST 0

Average 10/14/2019 1.34 20.5 3.01 12.6 90Previous Sample 10/7/2019 1.30 20.1 3.05 11.7 82‘18 Final Sample 9/17/2018 1.17 23.6 2.99 13.7 84

LembergerRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/7/2019 Keuka HARVESTFinger Lakes 10/7/2019 Dresden HARVESTFinger Lakes 10/7/2019 Wayne County HARVEST

’19 Final Sample 9/30/2019 1.78 21.0 2.99 8.6 99‘18 Final Sample 10/1/2018 2.01 20.3 3.21 7.6 143

MalbecRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Long Island 10/14/2019 2.13 22.3 3.56 6.5 158Prev. Sample 10/7/2019 LI-06 2.18 22.1 3.58 6.4 168‘18 Sample 10/15/2018 LI-06 2.33 18.7 3.74 6.1 307

Marechal FochRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Hudson Valley 9/30 HARVEST’19 Final Sample 9/23/2019 Northeast HV 1.28 21.3 3.16 10.0 66‘18 Final Sample 9/17/2018 Northeast HV 1.39 22.7 3.50 10.8 204

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MarquetteRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Champlain Valley 10/14/2019 Northern Champlain 1.42 23.1 2.95 11.4 237Champlain Valley 10/7/2019 Central Champlain HARVEST

Finger Lakes 10/7/2019 Ithaca HARVEST Finger Lakes 10/7/2019 Keuka W HARVEST Finger Lakes 10/7/2019 Dresden HARVEST

Hudson Valley 10/7/2019 Northeast HV HARVEST Hudson Valley 10/7/2019 Northwest HV HARVEST

Lake Erie 10/7/2019 Fredonia HARVEST Average 10/14/2019 1.42 23.1 2.95 11.4 39

Prev Sample 10/7/2019 1.31 22.3 2.99 10.6 172’18 Final Sample 10/1/2018 1.48 22.9 3.15 11.4 226

MerlotRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Hudson Valley 10/14/2019 East Central HV HARVEST 0Long Island 10/14/2019 1.96 22.1 3.69 4.9 107Long Island 10/14/2019 1.68 21.7 3.76 4.8 149

Niagara 10/14/2019 Niagara County 1.34 23.3 3.21 7.8 55Average 10/14/2019 1.66 22.4 3.55 5.8 104

Prev sample 10/7/2019 1.65 21.4 3.52 5.9 86‘18 Sample 10/15/2018 1.92 18.2 3.78 5.0 206

NiagaraRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Lake Erie 10/7/2019 HARVEST’19 Final Sample 9/30/2019 Portland 4.04 16.6 3.31 6.2 149‘18 Final Sample 9/17/2018 Portland 3.60 14.2 3.21 7.5 210

NoiretRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Lake Erie 10/14/2019 Sheridan HARVEST ’19 Final Sample 10/7/2019 Sheridan 1.58 16.3 3.28 8.7 211

Pinot NoirRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/7/2019 W. Cayuga HARVEST Finger Lakes 10/7/2019 E. Seneca HARVEST Finger Lakes 10/7/2019 Ontario HARVEST

Hudson Valley 10/7/2019 East Central HV HARVEST Hudson Valley 10/7/2019 Southwest HV HARVEST

Niagara 10/14/2019 Niagara County 1.13 23.0 3.18 6.9 162Niagara 10/7/2019 Niagara Escarpment HARVESTAverage 10/14/2019 Niagara County 1.13 23.0 3.18 6.9 162

Prev sample 10/7/2019 1.35 20.8 3.29 7.5 196‘18 Final Sample 10/8/2018 1.22 19.2 3.80 8.0 236

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RieslingRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 W. Seneca 1.30 17.8 2.98 11.8 95Finger Lakes 10/14/2019 E. Seneca 1.73 18.9 3.03 10.7 128Finger Lakes 10/14/2019 CL 90 Cayuga 1.40 18.7 2.95 10.1 62Finger Lakes 10/14/2019 Keuka 1.34 18.3 2.97 9.0 45Finger Lakes 10/14/2019 W. Canandaigua 1.60 18.1 2.90 10.3 95Finger Lakes 10/14/2019 Wayne County 1.47 18.8 3.09 9.0 147Finger Lakes 10/14/2019 Lansing 1.43 17.3 2.99 10.4 98Finger Lakes 10/14/2019 Dresden 1.56 17.9 2.94 9.3 69

Hudson Valley 10/14/2019 Hudson valley HARVESTHudson Valley 10/14/2019 SW Hudson Valley HARVESTHudson Valley 10/14/2019 East Central HV HARVEST

Lake Erie 10/14/2019 Portland HARVESTLong Island 10/14/2019 HARVEST

Average 10/14/2019 1.48 18.2 2.98 10.1 92Prev Sample 10/7/2019 1.49 17.7 3.07 9.4 118.0‘18 Sample 10/15/2018 1.66 17.4 3.16 8.0 161

Sauvignon BlancRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Long Island 9/23/2019 HARVEST’19 Final Sample 9/16/2019 1.49 20.2 3.29 7.2 164‘18 Final Sample 9/17/2018 LI-02 1.59 17.6 3.37 8.9 122

Seyval BlancRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 9/23/2019 Cayuga HARVESTHudson Valley 9/23/2019 Southwest HV HARVEST

Lake Erie 9/23/2019 Portland HARVEST’19 Final Sample 9/16/2019 1.93 19.7 3.17 8.4 155’18 Final Sample 9/10/2018 1.81 17.3 3.22 7.1

St CroixRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes HARVEST’19 Final Sample 9/23/2019 Geneva 2.12 20.0 3.21 8.8 171

TraminetteRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 Keuka 1.75 22.1 2.94 11.0 213Finger Lakes 10/14/2019 Ithaca HARVEST 0

Lake Erie 10/14/2019 Portland 1.63 21.5 3.16 8.5 252Average 10/14/2019 1.69 21.8 3.05 9.7 155

Prev Sample 10/7/2019 1.78 19.9 3.02 9.5 150‘18 Sample 10/15/2018 1.96 18.6 3.05 9.6 183

Vidal BlancRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/14/2019 Dresden 1.98 20.1 3.12 8.6 105Finger Lakes 10/14/2019 Geneva 2.02 18.1 3.01 10.0 28

Average 10/14/2019 2.00 19.1 3.07 9.3 67Prev Sample 10/7/2019 1.88 17.7 3.10 9.3 102‘18 Sample 10/15/2018 Dresden 1.95 22.4 3.22 8.0 118

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VignolesRegion Harvest Date Description Ber. Wt. g. % Brix pH TA g/L YAN (ppm)

Finger Lakes 10/7/2019 VSP Keuka HARVESTFinger Lakes 10/14/2019 R53V30 HARVEST Finger Lakes 10/14/2019 R62V78 HARVEST Finger Lakes 10/14/2019 R59V25 HARVEST

Lake Erie 10/7/2019 Portland HARVEST’19 Final Sample 10/7/2019 1.90 22.1 3.03 15.6 406‘18 Final Sample 9/17/2018 1.30 23.2 3.22 12.7 288

Powdery Mildew Phenotyping Robot Increases Efficiency in Evaluating Powdery Mildew Resistance in Breeding Programs

Tim Martinson and Janet van Zoeren

Senior research associate David Gadoury (L) and Post-Doctoral Associate Surya Sapkota with the powdery mildew phenotyping robot at Cornell AgriTech. The camera automatically takes images of leaf discs from different grape breeding selections that have been inoculated with powdery mildew spores. The camera cap-tures images that are analyzed to determine the extent of powdery mildew growth on the leaf discs. Evaluation is done by computer-based image processing and analsis. This method allows them to evaluate in one day what would take a technician using a microscope and counting two months to accomplish.

Photo by Janet Van Zoeren

The information, including any advice or recommendations, contained herein is based upon the research and experience of Cornell Cooperative Extension person-nel. While this information constitutes the best judgement/opinion of such personnel at the time issued, neither Cornell Cooperative Extension nor any represen-tative thereof makes any representation or warrantee, express or implied, of any particular result or application of such information, or regarding any product. Users of any product are encouraged to read and follow product-labeling instructions and check with the manufacturer or supplier for updated information. Nothing contained in this information should be interpreted as an endorsement expressed or implied of any particular product.

This newsletter was made possible with support from the New York Wine and Grape Foundation, Constellation Brands, and USDA Federal Formula funding through the Cornell and New York State Agricultural Experiment Stations.

Veraison to Harvest is a joint publication of:

Cornell Enology Extension ProgramStatewide Viticulture Extension ProgramLong Island Grape Program - Suffolk CCE

Finger Lakes Grape ProgramLake Erie Regional Grape Program

Eastern NY Commercial Horticulture ProgramCopyright 2019 © Cornell University