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Curent Status of Maize Leathal Nicrosis Disease in Tanzania . Presented to Regional Workshop to Develop a Strategy for Maize Lethal Necrosis Disease in Eastern and Central Africa at Jacaranda Hotel. 20 th - 24th August By K. Kitenge & Maize team. Outline. Introduction

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curent status of maize leathal nicrosis disease in tanzania

Curent Status of Maize Leathal Nicrosis Disease in Tanzania

Presented to Regional Workshop to Develop a Strategy for

Maize Lethal Necrosis Disease in Eastern and Central Africa

at Jacaranda Hotel

20th - 24th August

By

K. Kitenge & Maize team

outline
Outline
  • Introduction
  • Disease identification survey
  • Survey report
  • Measures taken
    • Immediate
    • Long term
  • Way forward
1 introduction
1. Introduction
  • In the recent years reported of unknown disease affecting maize in some areas of
    • Lake zone (Mwanza, Musoma and Shinyanga)
    • Central zone (Singida)
    • Northern zone - (Manyara- Babati, Mbulu and Simanjiro)

(Arusha- Karatu, longijave, Mlangarini and Arusha)

    • Therefore there was a need of conducting a disease identification survey
slide4

Introduction..

•AreasAffected

  • *Mwanza

*

Manyara

•Mwanza

•Manyara

•Arusha

2 disease identification survey
2.Disease identification survey
  • Followingreportsofan unknowndiseaseinTanzania,CIMMYT was invitedtobecome partof ataskforce toconfirmreportsof a new maizediseasethathas beenspreadingandcausingmajor losesamong farmers
  • TheTask forcecomprised of Drs.GeorgeMahuku (Pathologist),and Dan Makumbi (MaizeBreeder)ofCIMMYT,and DrAnneWangaifromKenyaAgriculturalResearchInstitute.
  • Theteamwas joinedby Mr.IgnathRwizaof theLakeZone

AgriculturalResearchInstitute(LZARI) inMwanza,and Dr. Richard Ndondi from Suba-AgroTradingCompany(SATEC)in Arusha.

slide6

3. Surveyreport

Overa 4-dayperiod,theteamvisited8 farmsin theMwanza

regionand 4 farmsintheArusha region.

Atotalof 60 samples (30 fromArusha regionand30 from

Mwanza region)werecollectedand thesewereanalyzedfor the

presenceof thepotyvirus-sugarcanmosaic virus(SCMV)

and maizechloroticmottle virus (MCMV)usingthedot blot

assaywith antibodiesspecifictosugar canemosaicvirus

(SCMV),maizechloroticmottlevirus(MCMV).

slide7

…Surveyreport

Someofthesampleswere analyzed usingreverse

transcriptasepolymerasechainreactionRt-PCR

techniquewithpotyvirus-specificprimers.

Outthe30samplesfromMwanzaregion,sofar9

havebeenanalyzed

MCMV

and4samplestestedpositivefor

While4samples

andSCMVviruses,

bothviruses

testedpositiveforbothMCMV

andonesamplewasnegativefor

slide8

…Survey report

All samples fromtheArusha regionhavebeen tested, and

2 samples werepositiveforMCMV,8 samples forSCMVand

14 samples werepositivefor bothMCMV and SCMV.

No virus wasdetected in samples collected froma very

youngcroplabeled field13inArumeru district. Maizelethal

necrosis disease(MLND) or Cornlethal necrosis (CLN)is a

resultofinfectionofmaizeplantsbySCMVandMCMV.

Thedetectionofbothviruses, either aloneor in combination

in the samples collected confirmsthe presence of MLND in

Tanzania

slide9

…Surveyreport

Affectedplants

Affectedplants

slide10

Karatu April, 2013

Nshara – Hai, April 2013

slide11

Disease Symptoms

Season 2012,therewerea

numberof fieldsinfested with this kindof disease

During CIMMYTM & E it wasfoundthat the symptomswerethe sameas thosefound in Kenya

Theideatobring CIMMYT pathologistwas then initiated

slide12

Disease Symptomsin cont’d

Mlangalini- Arusha

Mlangalini- Arusha

measures taken
Measures taken
  • Immediate actions
    • Sensitization activities
    • Information sharing with stakeholders (emails, reports)
    • Training extension, politicians and other decision makers at district , region and national levels though their respective meetings
    • Encourage stakeholders to visit SARI to see the disease
    • Interviews to researchers made by journalists and Press releases
    • Present papers to policy makers within & outside the zone -Parliament
    • Through conducted field visits to districts in the zone
    • Production & distribution of extension materials (brochure, posters)
    • Video documentation
    • Still pictures collections
actions
…Actions
  • Writing a proposal involving multidisciplinary activities to contain the disease
    • Breeders
    • Agronomists
    • Pathologists
    • Extensionists
    • Social economists
    • Police makers
solutions what farmers should do
Solutions (What farmers should do)
  •  Use treated improved seed
  •  Proper field management
  •  Fertilizer application
  •  Field sanitation
  •  Early planting
  •  Rouging if few plants are affected
  •  Distraction of the whole field
  •  Crop rotation
  •  Reporting to their leaders
slide23

Long term &The wayforward

1.

.Screening of new material National and Regionally available for resistant to the disease

2.

Development ofnew varietiesusing

resistantparentalmaterials

3.

Releaseofresistantvarieties