Wilt of Red gram/Pigeon pea/Arhar

DR. RAJBIR SINGH Assistant Professor

Department of Plant Pathology Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India Affiliated to Ch. Charan Singh University, Meerut (UP), India

Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com

Cell No. 91-9456613374

Wilt of Red gram/Pigeon pea/Arhar

• Reported by Butler in 1906

• Most dangerous disease of pigeon pea

• All arhar growing states of India

• Loss – 50%

Symptoms• Generally 5-6 weeks DAS but at any stage

• Symptoms appear after rainy season

• Appear in patches

• Plant affected partially or completely

• Blacking on stem near soil & upward several feet

• Cortex filled with white/ white pinkish mycelial growth

• Wilting & dieing of plants

Systemic Position

Kingdom – Mycota/ Fungi

Division – Eumycota

Sub division – Deuteromycotina

Class – Hypomycetes

Order – Hypomycetales

Family – Dematiaceae

Genus – Alternaria

Species - solani

Pathogen: Fusarium udum - Perfect stage

Gibberella inica – Imperfect stage

• Vascular tissues – filled with mycelium

• Survive as macroconidia &chlamydospore • Fav. Tem. – 17-19° C

• Microconidia- form on mycelium (6-11 x 2-3 µm)

• Macroconidia–form in sporodochia, 3-4 septa (15-50 x 3-5 µm)

• Chlamydospore – form on mycelium (5-10 µm) diameter

• Asospore – 8 (60-80 x 6-10 µm )

Macro conidia of Fusarium oxysporium

Macro and Micro conidia of Fusarium oxysporium

Chalamydospore of Fusarium oxysporium

Disease Management

• Crop rotation of 4 – 5 years

• Mixed cropping – Jower + Arhar

Jower ---- HCN

• Green Manuring – Neem & Jatropha

• Soil treatment – 1 part Formalin + 400 parts water

• Disease resistant varieties – C- 11, KWR-1, S-103,

Pusa 853, Pusa 855 etc.

Thank You