8/14/2019 Adelaide Hills Crop Watch 270809

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CropWatch SA Adelaide Hills is a service provided by 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. Always seek professional advice specific to your vineyard. All photos (c) James Hook,Richard McGeachy & Peter Magarey unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.

Growth Stage Frost DamageTemp.

Dormant -4.5C

Woolly Bud -3.5C

Greentip -1.1C

Shoots up to 150mm -0.5C

Shoots over 150mm 0.0C

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More Pest and Disease informationMore Pest and Disease informationMore Pest and Disease informationMore Pest and Disease information isisisis available atavailable atavailable atavailable at

www.www.www.www.adelaidehillswineadelaidehillswineadelaidehillswineadelaidehillswine.com.com.com.com.au.au.au.au

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Welcome to CropWatch for the2009/10 growing season.

An early budburst is expected acrossthe region due to warmer than averageweather conditions for July and August.Our neighbouring warmer climateregions, The Barossa Valley andMcLaren Vale are running two weeksearlier than last season.

This is significantly earlier than the longterm average dates.

This trend of early season budbursttrend is expected to continue as thewarmer vineyard sites in the Adelaide

Hills move past 50% Greentip (EL 4) inthe next two weeks.

Frost Risk and Weatherdamage

We are now entering the period wherecold temperatures can affect developingbuds and shoots in grapevines.

There has been some bud movementseen generally in stressed vines near

trees. Watch out for frost alerts in thecoming weeks if you have a history ofdamage.

The good news is the best defenseagainst frost is wet soil and windyweather. This week has seen moresignificant rainfall and kept soils atsaturation. A moist vineyard-floor withslashed weeds or cover crop storesmost heat and helps protect againstfrost.

Make sure any frost protection systemsyou have are working correctly. Checkany frost alarms and fix your irrigationsystems.

Above Early season winddamage.

Below Frost affected budscan later burst in a mosiacpattern.

Early Budburst in the Adelaide Hills

8/14/2019 Adelaide Hills Crop Watch 270809

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CropWatch SA Adelaide Hills is a service provided by 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. Always seek professional advice specific to your vineyard. All photos (c) James Hook,Richard McGeachy & Peter Magarey unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.

Beneficial Insects

Beneficial insects are either predators or parasites. Predatorshunt and feed on vine pests, while parasites hatch inside or on a

pest, and then they eat the pest as they grow.

The most common types of beneficial insects in your vineyardare:

Lacewings,Ladybirds, Predatory mites, Predatory wasps,& various types of spiders.

Some of these predators & parasites can be purchased forrelease in the field, but often they are expensive and ineffective.Your best bet is to conserve the beneficial insects already in yourvineyard. Keeping these bugs alive may help to keep pestproblems at an acceptable level through the year without having

to take any further action.

Different cover crop systems and management have differenteffects on beneficial insects. Other factors can also help maintainthe habitat of beneficial insects by leaving crop residue on theground and preserving woodlots, windbreaks, fencerows, andunmowed grassy ditch banks and waterways.

Left:Lacewing eggs are found on bark, or even trellis posts, theyare also found in your covercrop or volunteer weeds. After Budburst occurs popultions of Junk bugs the juvenille Lacewinglarvae will live inside your canopy eating soft bodied insects like

Light Brown Apple Moth.

Cover Crop System Technique Suitability for beneficial insects

Mono-culture ofAnnual cover cropEg. Cereals

Discing in Low

Slash/Throw Low-Moderate

Every second row retained Moderate

Mono-culture of permanent cover crop. EgRyegrass

Slashed Moderate

Every second row kept longevery Spring

Moderate-Good.

Volunteer cover crop. No cover crop planted, weedsslashed.

Moderate

Mixed cover cropEg. Ryegrass/Clover, Triticale/Vetch

Discing in Low-Moderate

Slash/Throw Moderate

Every second row retained intoSpring

Moderate- Good

Insectary Blends. Specialist cover crop thathave high pollen production- eg. IndianMustard,Buckwheat.

Flowering cover crop retainedinto Summer.

Good