Yellow squash is one of the prettiest vegetables around, with its bright yellow skin and creamy interior. ... According to scientific research, a yellow squash gets a green interior due to a notorious plant virus called the Cucumber Mosaic Virus (CMV). CMV is a virus first diagnosed inside a cucumber in 1934.

What if my yellow squash is green?

The disease known as either yellow mosaic or squash mosaic virus turn yellow squash green, or appears as yellow and green mottling over the fruit, reveals the University of California Integrated Pest Management Program. ... Mosaic virus strains are usually spread from host plants, such as weeds, by flying insects.

How can you tell if yellow squash is bad?

When this begins to happen, use them quickly (after cutting out any damaged spots). They will soon get mushy and a thick white liquid will form on their skin, at which point your squash has gone bad and must be thrown out.