wilt of chickpea, lentil and arhar
TRANSCRIPT
Wilt of Chickpea,
Lentil & ArharPresented by
Janjit AdhikariB.Sc. AgricultureIAAS, Paklihawa
Campus
Etiology
Scientific name Disease
Fusarium oxysporum f.sp. ciceris Wilt of Chickpea
Fusarium oxysporum f.sp. lentis Wilt of Lentil
Fusarium udum Wilt of Arhar
Pathogen BiologyDivision : Ascomycota
Order : HypocrealesFamily : Nectriaceae
Genus : FusariumSpecies : F. oxysporum
Soil Inhabitants, have ability to exist as saprophytes Pervasive Plant Endophytes ,can colonize roots.
Symptoms
The symptoms of wilts in Chickpea, Lentil and Arhar are very much similar.
The disease may appear from early stages of plant growth (4-6 week old plant) upto flowering and podding.
Common Wilting SymptomsFlaccidity of leaves and
succulent shoots
Discoloration and Chlorosis(Yellow) of leaves
Dessication & Drooping of leaves
Symptoms extend to other plant parts
Plant wilts, collapses and dies
Fig : Uprooted plant of chickpea showing typical yellowing symptom of Wilt
Fig 2(a) : Field view of Wilted lentil plants
Fig 2(a) : Screening of lentil germplasm in wilt-sick field
When the stem is split open, Browning or blackening of the xylem tissues is seen.
Fig 3 : Wilt at different stages of Chickpea. Seedling(left) & Mature (right)
Disease Cycle
The disease is seed and soil borne. Primary infection is through chlamydospores,
which remain viable upto next season. Secondary spread is through conidia by
irrigation water, cultural operation and
implements.
Disease ManagementMethods PracticesCultural Physical & Mechanical
Destruction of crop debris Deep ploughing Green Manuring/Well rotten FYM Intercropping with Sorghum : Root of sorghum exudates HCN which is phytotoxic to Fusarium Wilt-resistant Varieties
Chemical Seed treatment with Bavistin @ 2g/kg seed or Carbendazim
Biological Seed treatment with Trichoderma viride @ 4 gm/kg or Pseudomonas fluorescens @ 10 gm/kg
THE END