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TheDairySite Newsletter - 17 January 2014

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TheDairySite
Friday 17th January 2014.
Michael Priestley - Editor

Michael Priestley
Editor


Destructive Pasture Pest Heads West

One of New Zealand’s most serious pasture pests is on the move, this time being reported on the South Island’s west coast as parasitic controls struggle to keep up.

Clover Root Weevils (CRW) were first discovered in New Zealand in 1996 and plagued dairy pastures until an Irish wasp was released to control it in 2006.

North Island farmers, hit first by Sitona Lepidus, have reported clover losses of between 50 and 100 per cent.

The weevil, widespread in Europe and the US, causes considerable damage as an adult, particularly to white clover, leaving circular notches on leaves.

But farmers have been advised that it is the larval stage that wreaks the most damage.

Larvae feed on the nitrogen fixing nodules and roots of the clover, reducing pasture production and atmospheric nitrogen available in the soil.

Leading experts state 300 larvae per square metre can reduce clover dry matter production by 1000 kg/hectare.

Foliar insecticides can offer respite from Clover Root Weevils but Mark McNeill - a bio control expert at AgResearch New Zealand - explains this is complicated and can rely on getting chemistry to larvae in soils of high organic matter.

He also advised that seed coatings do not adequately protect and that reinvasion can occur when plants recover after an initial infestation is dealt with.

This is why scientists responded by releasing Irish Wasps microctonus aethiopoides, a small wasp with a particular preference for CRWs.

The wasp works by laying its eggs in the CRW, rendering it immediately infertile, before the eggs hatch out of the dead weevil.

So far the plan has been successful. The wasp has quickly established itself in core release areas and is spreading at 15-20 km annually.

AgResearch entomologist Dr Scott Hardwick is delighted with the wasps impact, which is now confirmed across vast swathes of dairy land.

But, he added: “We’re concerned that the weevil may be getting a jump start on the wasp further south on the West Coast. In wetter areas, clover root weevil may not fly as readily as it does in summer dry areas such as Canterbury.”

As well as climate, traffic is also affecting CRW spead.

He said: "This both limits the dispersal power of the Irish wasp, as it needs to be carried into new areas as eggs inside parasitised weevils, and leads to isolated ‘hot spots’ of CRW, which are often started by CRW hitching a ride on vehicles."


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Market Reports

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Global Dairy Industry News

   United States

Daily Dairy Trading: No Let Up in Prices, Thursday
Getting More From Your Slurry And Fewer Complaints
Daily Dairy Trading: Milk Futures Continue to Rise, Wednesday
NFU Women’s Conference Provides Skills, Guidance to Participants
Daily Dairy Trading: Class III Posts Further Gains, Tuesday
Cargill and Branhaven License Genomics Tool
Wyckoff's Weekly Cattle Outlook: Record US Cattle Prices
US Dairy Exports 'Come of Age'
Daily Dairy Trading: Butter Only Spot Market Mover, Monday
Dairy Trading Act Welcomed by Industry
Daily Dairy Trading: Butter Stays High, Class III Milk Increases Again, Friday
White Paper Highlights Complexities of Antibiotic Resistance Issues
Cattle Health: Watch Out For Wet and Windy Conditions
Competition for Farmland Changes Focus to Short-Term Fertility in 2014
USDA Reports Push Corn Sharply Higher, Soybeans Up, Wheat Sinks
Cold Snap Could Warrant Warm Baths For Newborns
Daily Dairy Trading: Little Spot Market Change After Wednesday's Big Gains
CME Group Hosts Analysts Outlook of USDA Reports
USDA Announces Speakers for 2014 Agricultural Outlook Forum

   United Kingdom

Scots To Get Rough Treatment From European Regulations
Keeping Dairy Heifers Outside Through Winter
Industry Told That 'Dairy Makes A Difference'
Protecting Our Water, Soil and Air
Fewest Calves Registered For a Decade in 2013
Farmers To Receive Help With Dairy Herd Genetics
Pig and Poultry Features at Livestock Event
Livestock Event 2014 To Offer More

   China

Large-Scale Farming to be Promoted In Northern China
Chinese Food Prices Rise With Beef Edging Higher

   New Zealand

Responsible Dairy Event Influences North Island Producers
Danone Initiates Legal Action Against Fonterra

   Ireland

New President Sets Out Key Priorities for Irish Farmers
Rising Input Costs Erode Price Gains for Irish Farmers
Irish Food and Drink Exports Approach €10 billion

   Germany

Scientists Find Fleckvieh Bull Infertility Gene

   Global

World Dairy Summit Says Dairy's Future Begins in Israel
World Food Prices Stay High, but Steady

   Argentina

National Laboratory Declared Brucellosis Reference Centre

   Russian Federation

Russia Could Place Embargoes on Norwegian Meat and Dairy

   Israel

New Foot and Mouth Confirmed Near Nazareth

   Mexico

Bid to Clear Foot and Mouth Commences

   Netherlands

Two More Companies Join Dutch Dairy Association

   Canada

New Canola Meal Website, Canolamazing.com, Launched

   Norway

New Publication Could Help Unravel Babesiosis Upsurge

   Denmark

Cow Fertility Could be Blamed on Breeding For Milk Yield

   Italy

Bluetongue Continues to Sweep Along Italy's West Coast

Events/Promotions

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