A native prickly pear cactus (Opuntia humifusa) on the left, thrives next to non-native horticultural varieties of succulent stonecrop species (Sedum or Phedimus). Photo by Bala Chaudhary.

Green roof systems are roofs that have incorporated plant material ... can significantly reduce root mealybug populations on Sedum grown in plug trays in a hoop house. Sedum is a genus of flowering ...