8/14/2019 Adelaide Hills Crop Watch 241209
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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJs Grower Services provide vineyard monitoring data, interpret weather data &compile the messages. Information is general in nature and should not be relied upon. Always seek professional advice specific to your vineyard. All photos (c) JamesHook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.
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MMMMore Pest and Disease information is available atore Pest and Disease information is available atore Pest and Disease information is available atore Pest and Disease information is available at
www.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.com
A Secondary Downy Mildew Eventdid not occur this morning. Good
news.
The region only received a very smallamount of rainfall in the 4 hoursbefore dawn and humidity did not getto 98%. This means Downy Mildewwill not sporulate and spread.
Event Date
10:10:24 (PrimaryEvent).
28th ofNovember
Primary Oilspots. 7th of
DecemberWarm, wet night(Secondary Event).
8th ofDecember
Secondary Oilspots. 15th ofDecember
Warm wet night(Secondary Event)
18th ofDecember
Where growers have taken actionDowny Mildew levels have largelyremained steady with little secondaryspread. Generally the warnings have
been heard and acted upon in anadequate period.
The main disease issues have beenseen in vineyards that have not beenadequately protected (left). Thesevineyards now have a significant levelof Downy Oilspots and in some rarecases bunch loss (below left).
It is strongly recommended growersinclude Downy Mildew protectants
with their remaining fungicide sprays.The late season options are captan,copper or mancozeb.
8/14/2019 Adelaide Hills Crop Watch 241209
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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJs Grower Services provide vineyard monitoring data, interpret weather data &compile the messages. Information is general in nature and should not be relied upon. Always seek professional advice specific to your vineyard. All photos (c) JamesHook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.
Powdery Mildew
Powdery Mildew has also been spreading again this week. Warm, dewy mornings increase humidity inyour canopy which helps the spread of the disease. Upper leaf infections and bunch infections have
been found this week in CropWatch blocks. Look out for the symptoms of bunch Powdery shown below.
Weed growthWeeds levels have also increased as recent rainfall and dews keep plants fresh and actively growing.Wireweed, especially has thrived in the humid, shaded environments.
Withholding Periods
Berry development is progressing steadily. Shiraz at Meadows and Balhannah has berries that aretouching Pre-Bunch closure (EL 32). Chardonnay, Pinot Noir and Sauvignon Blanc are also at or pastBunch closure.
GRAPEVINE PRODUCTS THAT CANNOT BE USED AFTER BERRIES PEASIZE (EL 31).
Name Withholding Period Target
Proclaim,Avatar
Peasize - EL 31, no later than 56 days before harvest. LBAM
Success2,Entrust
Peasize - EL 31. LBAM
Flint 500 WG,Cabrio
Peasize - EL 31 Powdery & Downy Mildew
Switch Peasize - EL 31 (before bunch closure) but no later than60 days before harvest.
Botrytis
Topas 100EC EL 31, no later than 60 days before harvest. Powdery Mildew
Legend EL 31, no later than 42 days before harvest. Powdery Mildew