Rubber (Hevea brasiliensis)
Powdery mildew (Oidium heveae)
Symptoms
- Prominently noticed on newly formed tender flush during the defoliation period of January-March.
- Tender leaves with ashy coating curl, crinkle, edges roll inwards and fall off leaving the petioles attached to the twigs giving a broom stick appearance.
- In later stages on older leaves white patches appear.
- Infected flowers and fruits shed.
Management
- For young plants, spray wettable sulphur (2 g/l) or carbendazim (1 g/l) at fortnightly intervals.
- For mature trees, dust with sulphur 3-5 rounds at weekly to fortnightly intervals.
- Sulphur mixed with an inert material like talc (70:30 mixture) is generally used @ 11-13 kg/ha per round.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Knapsack Sprayer (Capacity 10L) | Recommendation | Remarks | |
|---|---|---|---|---|---|---|---|---|
| Dosage/acre (200 L) | Dosage/hectare (500 L) | |||||||
| 1 | Carbendazim 50 WP | Bavistin, Benfil, Bengard, Benlate, Benmain, Bensaan, B-stin 50 WP, JK Stein 50 WP Carben, Carziim 50,Dhanustin, Dhanustin 50 Wp, Fungiguard Gancarzin 50, Glizim, Mintho Tagstin, Tiara, Zoom | Green | 1 g | 10 g | 200 g | 500 g | |
Extremely Toxic
Highly Toxic
Moderately Toxic
