Wilt of arhar

SLIDE OF WILT OF ARHAR DISEASE.

1. Wilt of arhar.

2. INDEX Introduction. Symptoms. Classifiaction Pathogen Disease management.

3. Introduction Reported by Bulter in 1906. Most dangerous disease of pigeon pea. Caused in all arhar growing state in India. Loss of crop about 50%

4. Symptoms Generally takes 5-6 week day but can cause at any stage. Symptoms appear after rainy season. Plant affected patially or completely cause blackening on stem near soil & upward several feet. Cortex filled with white/white pinkish mycelial growth. Wilting and dying of plant.

5. Systemic Position . Kingdom- Mycota/Fungi Division- Eumycota Sub division- Deuteromycotina Class- Hypomycetes Order- Hypomycetales Family- Dematiaceae Genus- Alternaria Species- solani

6. Pathogen Fusarium udum (perfect stage) Gibberella inica (imperfect stage) Vascular tissue- filled with mycelium survive as macroconidia & chlamydospore Fav. temp : 17-19 degree celsius macroconidia- form in sporodochia, 3-4 septa(15-50 micro metre)diameter microconidia- form on mycelium (6-11*2-3 micro metre) chlamydospore- form on mycelium (5-10 micro metre )diameter asospore- 8(60-80*6-10 micro metre)

7. Diease Management Crop rotation of 4-5 years mixed cropping - Jower + arhar 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.