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PublicEngagementtoolsininvasivespeciesmanagement

Dr.TVSajeevScientist

ForestHealthDivisionKeralaForestResearchInstitute

Achatina fulica TheGiantAfricanSnail

Oneamongtheworlds100worstinvasives

NativetoKenyaandTanzania

Widespread

infestation

in

the

last

3years

Feedsonnearly500plantspecies

Ofextremenuisancevalue

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HowtoinvolvethepublicinmanagingIAS

Inclusion of public values and ideas into the process

Public participation is an effective method for buildingpublic support

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GiantAfricanSnail

Origin:KenyaandTanzaniaofeastAfrica.Invadedmostofsouthernhemispherecountries.

Achatina fulica

FirstoccurrenceoutsideAfricawasinBengal,Indiain1847.Pathwayofspread:trade,transport,tourismandsmuggling.

Is a macrophytophagous herbivore;feed on vast variety of food crops.

Is a hermaphrodite. Lay 1200 eggs.Hibernate for 3 years. Moistcondition is ideal for them.

Carry pathogens. Is a vector of ratlung worm

Achatinafulicawitheggs

AllexceptfourdistrictsinKeralainfested

Highimpactonhomesteadagriculture,cardamomplantations

Preventsthegerminationofplants

Highnuisanceinurbandwellings

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Thelocalselfgovernmentsinallinfestedlocationswerealertedandthecontrolmethodwascommunicated

Lookoutnotice

Allpanchayathswhichwerepronetoinfestationwasprovidedwithlookoutnotices

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Coordinates recorded with GPS

Imported to GIS

Bioclimatic variables downloaded from Worldclim dataset (version 1.4)

Elevation taken from the SRTM 30 plus data

ras er coverages resamp es o a reso u on o arc p xe s

Principal component analysis reduced the number of varables to 14

Maximum entropy modelling (Maxtent ver. 3.3.3a) ) was used to predict the

potential distribution

The model was run for 500 iterations

VARIABLECONTRIBUTION

Variable Percentcontribution

PrecipitationofColdestQuarter 23.6

MeanDiurnalRange(Meanofmonthly(maxtemp min

temp))

22.1

MaxTemperatureofWarmestMonth 16.3

TemperatureAnnualRange(P5P6) 13.1

MeanTemperatureofWettestQuarter 8.8

PrecipitationofDriestMonth 8.1

TemperatureSeasonality

(standard

deviation

*100) 4.8

MeanTemperatureofWarmestQuarter 1.3

MeanTemperatureofDriestQuarter 0.9

PrecipitationofWettestQuarter 0.8

PrecipitationofWettestMonth 0.1

Isothermality(P2/P7)(*100) 0

AnnualPrecipitation 0

Predictionmodel

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Tobaccodecoction coppersuphate mixture

Eradicationprocess startedoffinfourdistricts

Newsatellitepopulationswhichoccurredin2011eradicated

Snailsin

most

locations

are

getting

into

hibernation

GearingupforcompleteeradicationworkstartinginFebruary2012

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Controlmethods

The control method adopted initially was to bait the snail usingcabbage leaves and to spray Tobacco decoction Copper sulphatemixture (TDCS mixture)

Owing to the difficulty posed by people to make the TDCS mixture,tobacco decoction was replaced with Actara- a nicotine based

pesticide

Thankyou

Currently experiments are under way to prepare Cupric ricinoleate whichhas been reported to have molluscicide effect.