Does a perennial hibiscus bush need to be pinched back at this time Mine just keeps growing taller and is beginning to look spindly Also leaves are being eaten by something that eats in straight lines?

Yes, pinching back a perennial hibiscus can help encourage bushier growth and prevent it from becoming spindly. You can trim back the stems by about one-third to promote branching. As for the leaves being eaten in straight lines, it could be a sign of pests like leafcutter bees or caterpillars; inspect the plant closely and consider using insecticidal soap or neem oil to manage any infestations.