| Sign of attack/symptoms |
Control |
| Insect-pests |
|
| Aphids : They cause damage by sucking growing shoots. |
Spraythecropwithmethyldemeton
(Metasystox 25 EC) or dimethoate (Rogor 30 EC) @ 750 ml/750 L water/ha. |
| Caterpillars : They feed on plant foliage and soft stem. |
Spray the crop with methyl parathion (Metacid 50 EC) @ 750 ml/750 L water/ha. |
| Diseases |
|
| Powdery mildew : Powdery mass on leaves and stems but does not harm cones. |
Dust the crop with sulphur 5% dust. |
| Downy mildew : It affects leaves, growing tips as well as mature cones. |
- Use healthy stock and remove diseased parts.
- Spray the crop with Bordeaux mixture (5:5:50) from April onwards or Indofil Z-78 (0.3%) as soon as the disease appears.
|
| Verticillium wilt : From the soil, the fungus enters plant roots and affects leaves and stalks. |
- Remove the diseased plants.
- Adopt 4 year rotation with potato.
- Three drenches with Bavistin 50 WP (0.2%) should be done in October, April and June.
|