Rubber (Hevea brasiliensis)
Pink disease (Corticium salmonicolor)
Symptoms
- Trees in the age group 3-12 years are highly susceptible.
- The seat of infection is usually at the fork region.
- White or pink coloured cob web mycelial growth form on the surface of the bark with streaks of latex oozing out from the lesion; resulting in rotting, drying up and cracking up of the affected bark.
- The distal portions of affected branches dry and dried leaves remain on these branches.
Management
- In high disease prone areas, the highly susceptible clones can be treated as a prophylactic measure with Bordeaux mixture or Bordeaux paste.
- In the early stages of infection, apply Bordeaux paste up to 30 cm above and below the affected region.
- Thiram (7.5 g/l) in pidivyl, china clay and water mixed in the proportion 1:2:4 by volume is very effective for control.
- Thiram (0.75 per cent) mixed in petroleum wound-dressing compounds like rubberkote, sopkote etc. is also effective.
- Regular inspection of trees during July to September for detecting the infection is recommended.
- In severe cases, prune off and burn the dried up branches.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Recommendation | Remarks | |
|---|---|---|---|---|---|---|---|
| Dosage/acre (200 L) | Dosage/hectare (500 L) | ||||||
| 1 | Hexaconazole 5 EC | Alert Creeper, Contaf, Corazole, Danzole, Force 5C, Hexaan, Hexacone, Hexadhan, Hexamax, Hexan, Hexazole, Mainex EC, Sitara, Strike, Titan, Topper, Topper plus EC, Xantho | Blue | 5 ml/ kg of rubber kote | 1000 ml | 2500 ml | Very effective as rainwash is prevented |
| 2 | Propiconazole 25 EC | Bumper, Dhan, Pinade, Propiguard, Propik Final, Radar, Result, Tilt, Tilt Albu, Zetox | Blue | 5 ml/ kg of rubber kote | 1000 ml | 2500 ml | |
| 3 | Thiram 75 WP | Hexathir, Tagithram, Thiram 75 DS, Thiride, Vegfru Thiram | Blue | 10 g / kg of rubber kote | 2000 g | 5000 g | |
Extremely Toxic
Highly Toxic
Moderately Toxic
