Botrytis gray mold: Botrytis cineria
| Symptom | |
| Lack of pod setting is the first indication. Under favourable conditions, foliage shows symptoms and plants often die in patches. Shedding of flowers and leaves, covered with spore mass can be seen. Lesions on stem are 10-30 mm long and girdle the stem fully. Tender branches break off at the point where the gray mold has caused rotting. Affected flowers turn in to a rotting mass. Lesions on the pod are water-soaked and irregular. On infected plants, the pods contain either small, shriveled seeds or no seeds at all. Management Avoid excessive vegetative growth. Intercrop with linseed. Avoid excessive irrigation. Use compact varieties. Deep summer ploughing Reduce plant density and increase in air passage between the plants. Seed treatment with Carbendazim + Thiram (1:1) @ 3g/kg of seed is recommended or Spray the crop with Captan 5 - 6 kg/ha at 15 days interval./Spray of Carbendazim @ 1.5g/lit of water is recommended./Spray Mancozeb @3 g/lit of water. |
- Lack of pod setting is the first indication.
- Under favourable conditions, foliage shows symptoms and plants often die in patches.
- Shedding of flowers and leaves, covered with spore mass can be seen.
- Lesions on stem are 10-30 mm long and girdle the stem fully.
- Tender branches break off at the point where the gray mold has caused rotting.
- Affected flowers turn in to a rotting mass.
- Lesions on the pod are water-soaked and irregular.
- On infected plants, the pods contain either small, shriveled seeds or no seeds at all.
Management
- Avoid excessive vegetative growth.
- Intercrop with linseed.
- Avoid excessive irrigation. Use compact varieties.
- Deep summer ploughing Reduce plant density and increase in air passage between the plants.
- Seed treatment with Carbendazim + Thiram (1:1) @ 3g/kg of seed is recommended or Spray the crop with Captan 5 - 6 kg/ha at 15 days interval./Spray of Carbendazim @ 1.5g/lit of water is recommended./Spray Mancozeb @3 g/lit of water.