Certain types of blue grass are susceptible to rust. Insecticidal soap and pesticides such as carbaryl or rotenone provide only temporary control. Applications must be repeated weekly until the bugs are gone. Thorough garden cleanup to remove overwintering sites and continual trapping or handpicking during the growing season will reduce the population. Some varieties of squash, such as zucchini, are less susceptible to squash bug damage.
Loopers are green with white stripes on their backs.
Controls for both are similar. Eggs are laid singly on the leaves. Natural parasites, predators and diseases often control them. I ve checked for lawn grubs but there are none . It may be a thatch problem that is preventing water and air from reaching the root zone.