White rust, caused by the fungus Albugo candida, affects all parts of cruciferous plants except the roots. It causes powdery white or creamy yellow blister-like pustules on leaves, stems, flower stalks, and siliques. If the infection is systemic, it results in hypertrophy and hyperplasia, distorting and swelling stems and floral parts. The disease can cause yield losses between 17-37%. Management strategies include using certified seed, seed treatment, removing weeds, crop rotation, deep plowing, balanced fertilization, and fungicide sprays of mancozeb or mixtures of metalaxyl and mancozeb.

1. White Rust / White Blisters of
Crucefers
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

2. White Rust / White Blisters of Crucefers
• All crucifers pls. affected
• All parts of country
• Occurs with D. M. (Parnospora parasitica)
• Loss – 17 - 37%

3. Symptoms :
• All parts affected except roots
(1). Local infection
• Leaves, stem, flower stalk – white /creamy, yellow
blister like pustules (1-2 mm)
• Powdery growth on pls/ on lower surface of leaves
• Yellow on upper surface
• White pustules on stem & siliquae

4. (2). Systemic infection
• Systemic infection on new stem & inflorescence
• Hypertrophy
• Hyperplasia
• Swelling & distortion of stem & floral parts resulting in
hypertrophy & hyperplasia
• Known as Staghead

12. Pathogen – Albugo candida
• Survive in soil as Oospore in crop debris
• Survive in seed (primary inoculum)
• Survive on perennial weeds – horse radish
• Secondary spread by– sporangia & zoospore
• R. H. – >75%
• Tem. – 5-12° C

13. Systemic Position
Kingdom – Mycota/ Fungi
Division – Eumycota
Sub division – Mastigomycotina
Class – Oomycetes
Order – Pernosporales
Family – Albuginaceae
Genus – Albugo
Species - candidia

16. Disease Management
• Use certified seed
• Seed treatment – Metalaxyl (Apron 35 SD)- @ 6 gm/ kg seed
• Removal of weeds
• Destroy plant debris
• Crop rotation of 2-3 years
• Deep ploughing
• Early sowing
• Use balance fertilizers – no heavy use of N2
• Spray- Mencozeb (Dithane M- 45 / Indofil M-45) @ 2 kg/hec.
• Ridomil MZ 72 WP (mixture of Metaxyl 64% + Mencozeb 8%) @ 2 kg/hec.
3 sprayers at 15 days interval

17. Thank You