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