About Lesson
Necrosis
- Spots: Leaf spot of broad leaf mustard ( Alternaria brassicae)
- Anthracnose: Mango anthracnose ( Colletotrichum spp.)
- Canker: Citrus canker (Xanthomonas citri)
- Blight: Late blight of potato (Phytophthora infestans)
- Damping off: Pythium spp.
- Rots: root rot (Rhizoctonia solani).