In the cultivation process of lemongrass, disease management is quite very importan. That's where this powerpoint presentation comes into importance.

1. LEMONGRASS

2. DISEASES OF LEMONGRASS
PRESENTED BY
ABHINANDAN KUMAR
B.Sc.(Hons) Agriculture
18042600148
QUANTUM UNIVERSITY

3. LEMONGRASS
(Cymbopogon flexuosus)
Family - Poaceae
Common Diseases infecting
Lemongrass-
• Long Smut (Fungal infection)
• Red Leaf Spot (Fungal pathogen)
• Leaf Blight (Fungal pathogen)
• Rust (Fungal infection)
• Little Leaf / Grassy Shoot (Fungal pathogen)

4. Long Smut
(Tolyposporium christensenii)
• SYMPTOMS-
 Flowers in the inflorescence are transformed into
slender, tubular to conical cream-colored sori.
 These sori flake off at maturity, starting from the
tip and hang in shreds.
• CONTROLS-
 Prolific spraying of Dithane Z-78 @ 0.2% just
before flower initiation.
 Treating the seeds with Cersan (0.2%) or Emisan-6
@ 1g/kg of seed before sowing.

5. Red Leaf Spot
(Colletotrichum graminicola)
• SYMPTOMS-
 Brown spots with concentric rings in the centre
appearing on the lower surface of the leaves.
 The spots may be formed on leaf sheaths and midrib.
 Later the spots merge to form bigger patches and the
affected leaves dry away.
• CONTROLS-
 Two sprays of Bavistin 0.1% just after the appearance
of the disease at an interval of 20 days.
 Three sprays of Dithane M-45 (0.2%) at an
interval of 10-12 days.

6. Leaf Blight
(Curvularia andropogonis)
• SYMPTOMS-
 Minute, circular, reddish brown spots mostly on the
margins and tip of the leaves.
 Later, merge to form elongated reddish brown necrotic
lesions resulting in premature drying of leaves.
 Older leaves are more susceptible to infection.
• CONTROLS-
 Spraying Dithane Z-78 (0.2%) or 0.3% Copper
oxychloride at an interval of 12-15 days.

7. Rust
(Puccinia nakarishikii)
• SYMPTOMS-
 Discrete, linear brown uredinia appear on the lower surface
of the leaves associated with chlorotic streaks.
• CONTROLS-
 Spray Dithane Z-78 (0.2%) or Copper oxychloride (0.3%)
or Plantavax (0.1%) at an interval of 10-12 days.

9. Little Leaf / Grassy Shoot
(Balansia sclerotica)
• SYMPTOMS-
 Stunted growth.
 Little leaf formation in place of normal inflorescence.
• CONTROLS-
 Spraying Dithane Z-78 (0.3%) just before flowering
stage at an interval of 10-12 days.
 Use of fresh seedlings for plantation and crop rotation.

10. REFERENCES
• http://nhb.gov.in/bulletin_files/aromatic/lemongrass/lem002.pdf
• http://nhb.gov.in/report_files/lemongrass/LEMON%20GRASS.htm
• https://www.gardeningknowhow.com/edible/herbs/lemongrass.htm