It is a cucumber mosaic virus symptoms on Ridgegaurd & Cucurbita family.
the diseases (virus) Spread from the Aphid. need to control the aphid population.
install blue/yellow sticky trap @50/acre, uproot the virus infected plants. Spray Thiamethoxam 25% @10 g or Imidacloprid 17.8%@5ml/10 liters of water.