survey for diabrotica extension and management in france · usual trap device= 100 catches extended...

Survey for Diabrotica extension

and management in France

Marc DELOS1, Maria MANNINO 2,

Bertrand HUGUET3

1 SRAl - DRAAF Midi-Pyrénées - TOULOUSE

2 Direction Générale de l'Alimentation – PARIS

3 SRAl – DRIAAF –CACHAN

Ministry of agriculture, agro-food and forestry- FR

Diabrotica situation

in 2009In relation with motorways

– Italy distance and maize

monocrop

Management PerspectivesSituation

We suspected that Diabrotica which

were mainly an air borne pest (by

plane) 2002 to 2006 became a road or

rail borne pest (by truck or by train)

Milan

400 km

Milan

300 km

First since 2002 to 2006

Eradicated since 2007

0

500

1000

1500

2000

2500

3000

3500

4000

4500

2006 2007 2008 2009 2010 2011 2012

July added in august

Traps number evolution in France


Diabrotica

situation in 2012

and previous

years

sum 2009 sum 2010 sum 2011 sum 2012

catches 294 99 1458 1940

corrected 294 99 708 1870

Corrected : usual trap device

(without catches added in CULOZ)

We verified that Diabrotica which

were mainly an air borne pest (by

plane) became a road or rail borne

pest ( by truck or by train)

Milan

300 km

Milan

400 km

Ante 2012

2012


0

20

40

60

80

100

120

140

26

July

(27) 28 29 30

August

(31) 32 33 34

Sep

t (35

)36 37 38

Alsace

RA

2011

0

50

100

150

200

250

300

350

400

26

July

(27) 28 29 30

August

(31) 32 33 34

Sep

t(35

)36 37 38

Alsace

RA

2012

In 2012

6 weeks of significant catches

later than in 2011

Catches and time in the year


Diabrotica

situation in RA

area in 2011 and

previous years

sum 2009 sum 2010 sum 2011 sum 2012

84 53 1104 986

294 99 354 917

Trap Map distribution and positive trap

http://draaf.rhone-

alpes.agriculture.gouv.fr/IMG/pdf/carte_des_pieges_et_captures_30_aout_cle4b321

2.pdf

An increase risk close to industries

truck park in Culoz (788 catches)

Corrected : usual trap device

(without catches added in CULOZ)


http://draaf.rhone-alpes.agriculture.gouv.fr/IMG/pdf/carte_des_pieges_et_captures_30_aout_cle4b3212.pdf




Usual trap device= 100 catches

Extended trap device = 650 for a

late survey

Culoz case in 2011

An usual trap device limited catches

to 100 along the main road.

Main catches close to the city and

industries

under evaluated because late traps

deploymentManagement PerspectivesSituation

Diabrotica situation in

RA area in 2012

Soil effect on final population

2009 2010 2011 2012

catches 84 53 1104 986

corrected 294 99 354 917

Trap Map distribution and positive trap

http://draaf.rhone-

alpes.agriculture.gouv.fr/IMG/pdf/carte_des_pieges_et_captures_30_aout_cle4b3212.pdf

Culoz : soil very dam land

2011 -> 789 catches

2012 ->69 catches Aiton: Soil healthy clay

2011->57catches

2012->241catches

Blyes : healthy loam and stone soil

2011 ->30 catches

2012 ->227 catches

Under 110 mm

rainfall in may

( 1st larvae stage)





Diabrotica situation in 2011

in Alsace, French Rhine

side and previous years


Diabrotica situation in 2012

in Alsace, French Rhine

side and in previous years.

sum

2009

sum

2010

sum

2011

sum

2012

catches 206 29 339 882


Change in Diabrotica status

in France after summer 2009:

• Small populations but established in several

outbreaks, particular in Alsace and Rhône-Alpes

where eradication seemed no longer possible with

measures on small areas (R=1 km focus + R=5 km

safety)


• In these regions containment was considered more

effective than eradication to prevent the spread of

Diabrotica: measures lighter but implemented on larger

areas.

Possible strategies in France

studied for economic and phytosanitary impact

Implemented in Alsace and Rhone Alpes

area since 2010

Eradication

safety zone 0 catches 1 to 29 catches >29 catches

R0T0 R2T0 R3T0 R6T3 R6T4 R=1 km R3T1 R=1km

Year 1 maize maize maize maize maize maize

Year 2 maize Rotation maize maize Maize + larvicide Maize + larvicide

Year 3 maize maize Rotation Maize + larvicide Maize + larvicide Rotation

Year 4 maize Rotation maize Maize + larvicide Maize + larvicide maize

Year 5 maize maize maize Maize + larvicide Maize + larvicide Maize + larvicide

Year 6 maize Rotation Rotation Rotation Rotation Rotation

containment


Social and economical side

- Cost for farmers

- Cost for national ecoomy

8,4

11,2

13,0

16,3 16,4

13,313,2

10,5

9,0

6,7

11,211,1

8,8

7,5

5,6

0,0

2,0

4,0

6,0

8,0

10,0

12,0

14,0

16,0

18,0

20,0

AL40 + RH40 AL60 + RH60 AL80 + RH80 ALfront + RHreg ALreg + RHreg

Scenarri for areas

ME

UR

R2

R3+larv

R3+st7

R3+st14

R3+st21

R4+larv

R6+larv+st7

R6+larv+st14

R6+larv+st21

R6+larv

Global cost for farmers(Millions EUR/Year - actualisation on 12 year at 4%/year)

Grain lost harvest(% global harvest 2008-09 due to rotation)

12%

16%

19%

24% 24%

6%

8%9%

12% 12%

4%

5%6%

8% 8%

0%

5%

10%

15%

20%

25%


Scenarri for areas

% g

lobal

har

vest

ré

duc

tion

20

08

-09

R2

R3+larv

R3+st7

R3+st14

R3+st21

R4+larv

R6+larv+st7

R6+larv+st14

R6+larv+st21

R6+larv

314

420

490

633 637

319317

245

210

157

212211

163140

105

0

100

200

300

400

500

600

700


Scenarri for areas

x 1

00

0 t

ons

R2

R3+larv

R3+st7

R3+st14

R3+st21

R4+larv

R6+larv+st7

R6+larv+st14

R6+larv+st21

R6+larv

Production decrease maize for grain(x 1000 tons/year)

Depending from

scenario

Depending from

soil conditions

More ? Contact: [email protected]


200

9=

2009=206

catches

2009=209

catches

2011=

339 catches

For 1000

traps2011=

6020

catches for

487 traps

French strategy starts after an open discussion with german colleagues in 2009

1/17

1/1

2009 2011


200

9=

2012=882

catches

For 1000

traps

2012=

5803

catches

2011=

339 catches

For 1000

traps2011=

6020

catches for

487 traps

French strategy starts after an open discussion with german colleagues in 2009

1/17

1/7

2012 2011

cypermethrine

2012

in furrow

=

performance

decrease on

early sowing?

tefluthrine 2011

in furrow

=

Performance

correct?


Agronomy on larvae: rotation: the cornerstone but in a larger area to bemore efficient. In a such surface, ½ and even 1/3 too difficult for growers,sillage production in the big milk crisis. Volunteers and poacea in spring crops may affect rotation efficacy.No physical separation between fields: affect efficacy of rotation.

Chemical on Adults: insecticides sprayed, pyrethroids, on adults risk tohave partial repellent effect, if dose decrease-what about other a.i as indoxacarbe ?-what about with attractive (cucurbitacin) ?

- what about side effect of insecticide on Ostrinia nubilalis (ECB)?


Chemical on larvae: trials in Italy and Magyar -> interesting efficacy ofpyrethroids granules (tefluthrine) in furrow :

60 –70% regular reduction adult emergence on established population

Efficacy better in case of delayed sowing date or lower population.-> delay sowing date to mid may improve efficacy and reach 80-90% andmore with low infestations.

Diabrotica virgifera virgifera:

Rotation efficacy is considered 98 % efficacy but…

Arvales: Digitaria sanguinalis, Panicum capillare, Setaria faberi, and Setaria

viridis …secondary host less efficient for larval survival.

Alternatives Hosts in field rotation

Zea mays volunteers in spring crops.

Good management but to undertake in patatoes, beets and sunflower.

Management impossible in sorghum, in soybean due to prohibition of

trifluraline.

Negative impact of those topics:

May reduce greatly rotation efficacy.

Has been observed in France by catches in fallows, soybeans ( 2007,

2008, 2009,2011) close to maize volunteers.


Most effective/pest

0,00 500 1 000 1 500 2 000

Wheat

Barley

Maize (G+F)

OSR

Sunflower

peas

Sugarbetts

patatoes

grass land

FallowsUsual crops following

corn in France:

food contaminant impact

DON-ZEA

(x1000ha)

2011 study on contaminants

in human alimentation EAT2

DON contamination is more

awareness than pesticide

residues in food in Francehttp://www.anses.fr/index.htm


Maize price in 2010 , 2011 and 2012

Maize price is the

main parameter for

economic prospective

on containment and

eradication costs

Volatility will increase

greatly in the future

for agriculture

commodities

P Chalmin

How to deal with ???

2011

2010

2012

2011


Monitoring and current spread of Diabrotica virgifera in France:

An increasing economic problem: Yes

Pest not yet present at the damage threshold

Cost is surveillance and spread prevention

Management conclusionSituation

Need of sustainable complementary tools for control and feasible solutions for farmers

French experience in control strategies against Diabrotica virgiferawere built with partnerships with Germans, Magyars and Italians

Cooperation between authorities responsible for plant health, experts and professionals allowed to share objectives and measures

consistent with sustainable agriculture.

This led to significant changes in farming practicesover very large portions of French territory.

Thank you for your attention

The end of THE world:

Certainly not

The end of A world:

Perhaps

A world of limited ressources :

Certainly

a world of limited resourcesa world of limited resources

The end of THE maize crop in EU:

Certainly not

The end of A way to grow maize:

Perhaps

A world of limited options :

Certainly

But maize crop contributes to solve A world with limited ressources.

Sustainability for this crop is the key.

We have to share it.

2012 Diabrotica

survey for diabrotica extension and management in france · usual trap device= 100 catches extended...

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