Cucumber mosaic disease (Cucumber mosaic virus)

Symptoms

• The common symptoms include irregular light and dark green or yellow patches or streaks on the leaf and floral parts.
• The symptoms are mainly seen on younger leaves.
• The affected leaves become stunted, curled, or wrinkled. And the veins may be lighter than normal or banded with dark green or yellow discoloration.
• Plants are often dwarfed, with fruit and flowers fewer than usual, deformed, and stunted.
• New growth is cupped downward, and leaves are severely mottled with alternating light green and dark green patches.
• Plants are stunted, and fruits are covered with bumpy protrusions. Severely affected fruit may be almost entirely white.

Management

• Control of the virus is largely dependent on the control of the aphid vectors.
• Use resistant varieties.
• Reflective mulches like White plastic mulch can deter aphid feeding
• Rouge out the affected plants.
• Applying sticky traps or covering the ground with an aphid deterrent material like aluminium foil boards can help in reducing the disease incidence.
• Apply neem cake in the planting pits.

Chemical Control

Extremely Toxic

Highly Toxic

Moderately Toxic

Slightly Toxic