Why would planting large areas with a single crop plant expedite the adaptation and reproduction of plant parasites?

Planting large areas with a single crop, known as monoculture, creates a uniform environment that can facilitate the rapid adaptation and reproduction of plant parasites. This is because parasites, such as fungi and insects, can easily exploit the genetic homogeneity of the crop, leading to increased transmission rates and survival. The lack of biodiversity reduces the presence of natural predators or competitors that might otherwise help control the parasite populations. Consequently, this concentrated resource availability allows parasites to evolve more quickly, potentially leading to the emergence of more virulent strains.