Adelaide Hills Crop Watch 171209
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CropWatchSAAdelaideHillsis aserviceprovidedbytheAdelaide HillsWineRegionInc.DJ’sGrower Servicesprovidevineyardmonitoringdata,interpretweatherdata& 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) James Hook&RichardMcGeachyunless noted.CropWatchacknow ledgesthesupport ofJamesHook&MatthewWilson inpreparingthis message. C C Cr r r r r r r r r r o o op p p p p p p p p pW W W a a a t t t t t t t t t t t t c c c h h h h h h h h h B B E E R R R R I I E E S S P P E E A A I I ZE E E E L L 3 3 1 Downy Mildew Oilspots have been found in 50% of CropWatch early this week. Oilspots can be found all throughout the district (right). Look at your vineyard now for Downy Oilspots. A Secondary Downy Mildew Event has been recorded this morning this has caused spread of Oilspots within unprotected, infected blocks. Remember once Oilspots appear they cannot be successfully killed by metalaxyl ( Ridomil, Axiom ). In what we have found this week, the majority of this secondary spread is located below the cordon or on fresh growth either up high on VSP systems or out on tips with sprawled canopies. This new growth is difficult to protect, but growers should be reminded to adjust spray coverage as the canopies develop. This season’s growth rates (relative to previous seasons), require some level of adjustment. Growers need to get a good coverage to limit the spread of Downy Mildew. Event Date 10:10:24 (Primary Event). 28 th of November Primary Oilspots. 7 th of December Warm, wet night (Secondary Event). 8 th of December Secondary Oilspots. 15 th of December Warm wet night (#2 Secondary Event) Thursday the 18 th , December If your vineyard is unprotected CropWatch advises the use of a Post Infection Downy Fungicides (e.g Ridomil or Axiom) within the next 5 days (23 rd Dec). It is recommended growers include Downy Mildew protectants with their fungicide sprays, especially as more rain is forecast for next week ending the 25 th . D owny Mildew Secondary Warm, Wet Night This message from Adelaide Hills CropWatch was This message from Adelaide Hills CropWatch was This message from Adelaide Hills CropWatch was This message from Adelaide Hills CropWatch was compiled for th compiled for th compiled for th compiled for the week ending e week ending e week ending e week ending Friday, Friday, Friday, Friday, Decem Decem Decem December ber ber ber 18 8 8 th th th th 2009 2009 2009 2009 and will be updated and will be updated and will be updated and will be updated prior to prior to prior to prior to Decem Decem Decem December ber ber ber 25 25 25 25 th th th th . More Pest and Disease information is available at More Pest and Disease information is available at More Pest and Disease information is available at More Pest and Disease information is available at www.adelaidehillswine.blogspot.com www.adelaidehillswine.blogspot.com www.adelaidehillswine.blogspot.com www.adelaidehillswine.blogspot.com
Transcript of Adelaide Hills Crop Watch 171209
8/14/2019 Adelaide Hills Crop Watch 171209
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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJ’s 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) James Hook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.
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Downy MildewOilspots have been found in 50% of CropWatch earlythis week. Oilspots can be found all throughout the
district ( right ). Look at your vineyard now for DownyOilspots.
A Secondary Downy Mildew Event has beenrecorded this morning this has caused spread ofOilspots within unprotected, infected blocks.
Remember once Oilspots appear they cannot besuccessfully killed by metalaxyl ( Ridomil, Axiom ).
In what we have found this week, the majority of thissecondary spread is located below the cordon or onfresh growth either up high on VSP systems or outon tips with sprawled canopies. This new growth is
difficult to protect, but growers should be reminded toadjust spray coverage as the canopies develop. Thisseason’s growth rates (relative to previous seasons),require some level of adjustment. Growers need toget a good coverage to limit the spread of DownyMildew.
Event Date10:10:24 (Primary Event). 28 th of November
Primary Oilspots. 7 th of December
Warm, wet night(Secondary Event).
8 th of December
Secondary Oilspots. 15 th of December
Warm wet night(#2 Secondary Event)
Thursday the18 th , December
If your vineyard is unprotected CropWatch advisesthe use of a Post Infection Downy Fungicides (e.gRidomil or Axiom) within the next 5 days (23 rd Dec).
It is recommended growers include Downy Mildewprotectants with their fungicide sprays, especially asmore rain is forecast for next week ending the 25 th.
Downy Mildew Secondary Warm, Wet Night
This message from Adelaide Hills CropWatch wasThis message from Adelaide Hills CropWatch wasThis message from Adelaide Hills CropWatch wasThis message from Adelaide Hills CropWatch was
compiled for thcompiled for thcompiled for thcompiled for the week endinge week endinge week endinge week ending Friday,Friday,Friday,Friday, DecemDecemDecemDecember ber ber ber
11118888 thththth 2009200920092009 and will be updatedand will be updatedand will be updatedand will be updated prior toprior toprior toprior to DecemDecemDecemDecember ber ber ber
25252525 thththth ....
More Pest and Disease information is available atMore Pest and Disease information is available atMore Pest and Disease information is available atMore Pest and Disease information is available at
www.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.comwww.adelaidehillswine.blogspot.com
8/14/2019 Adelaide Hills Crop Watch 171209
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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJ’s 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) James Hook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.
Bunch ClosureRemember varieties on an open trellis and bunches with an open configuration develop less rot in wetconditions. They have better airflow and lower canopy humidity after rain. A good canopy structure is akey part in botrytis control. High quality Pinot Noir and Shiraz that is picked in late March has a low riskof developing a significant level of botrytis before it is picked- without chemical application!
Sauvignon Blanc and Chardonnay and most other tight bunched varieties have a higher risk. These arepassing through bunch closure now the only fungicides available after the completion of bunch closure ifneeded are the dicarboximides eg. Rovral ™ . Never apply Rovral Liquid with sulfur as this mix can burnwith high temperatures. Water based formulations are considered a safer option.
LBAM insecticides Avatar ® , Entrust ® , Proclaim ® & Success ® all have a withholding period of Peasize (EL31). In some vineyards berries have grown past Peasize (EL 31). From next week in Chardonnay in thewarmer parts of the Adelaide Hills, only the biological insecticide BT’s will be able to be used.
Above: A good guy – this predatory shield bugfeed on your caterpillars. Click here for morebeneficial insect pictures .
Beneficial insects can be your most effective toolin controlling LBAM in the lead up to harvest. A‘hungry’ predator population will eat apple mothand keep them from eating berries.
Below right: The life of apple moth. EggmassLarvae ( Caterpillars ) Pupae ( Cocoon ) Moth.
Here an apple moth cocoon is shown. The applemoth emerges from this and mates before layingan eggmass and starting the cycle again.
Withholding Periods
GRAPEVINE PRODUCTS THAT CANNOT BEUSED AFTER BERRIES PEASIZE (EL 31).Name Withholding Period Target
Proclaim,Avatar
Peasize - EL 31, nolater than 56 daysbefore harvest.
LBAM
Success 2,Entrust
Peasize - EL 31. LBAM
Flint 500WG,Cabrio
Peasize - EL 31 Powdery &Downy Mildew
Switch Peasize - EL 31 (beforebunch closure) but nolater than 60 daysbefore harvest.
Botrytis
Topas100EC
EL 31, no later than 60days before harvest.
PowderyMildew
Legend EL 31, no later than 42days before harvest.
PowderyMildew
8/14/2019 Adelaide Hills Crop Watch 171209
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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJ’s 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) James Hook & 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 this week. Flag-shoots have been detected in non-CropWatchblocks within the district. Cleistothecia infections have developed further with large, shaded, humidcanopies aiding the development and spread of the disease.
If there is any sign of Powdery in your vineyard, apply two sprays of a suitable registered fungicide at 10-day intervals in attempt to stop the disease increasing. For Powdery protection avoid spraying wettablesulfur at high temperatures (>35 0C) when the humidity is >70% within 24 hours of spraying. Growers canopt to use Legend tm in hot weather to avoid sulfur burning. This allows them to keep up the protection on
their vineyard.
