The study looked at how mosaic viruses affect the physical properties of bottle gourd plants in the Western Himalayas. They found that different isolates of mosaic diseases caused mild and severe symptoms in the plants. Bottle gourd, a popular vegetable in India, can be affected by various viruses, with 10 different viruses reported worldwide. The researchers focused on Lagenaria siceraria, a type of bottle gourd, to understand how these viruses impact the plant's growth and health.