A thorough soaking can help to reduce drought stress. If you simply water the lawn with a sprinkler, the tree will not receive enough water. Turn the hose upside down over the holes so that it will soak into the ground. Repeat the procedure once every 3 weeks from May until late August. Needles turn red-brown in spring, fading to light brown by summer.
Cedars are particularly susceptible.
Take steps to protect the trees from the sun and wind, using screens. Entire branches or the outer ends of the entire tree may be affected. Thorough watering will help dilute the salts in the soil, though nothing practical can be done about soils with high levels of salts. Washing the tree with water will help control these insects. In severe cases, an insecticide can be used.