 Residents of Hinkley, Cambridge, and North Branch may see low-flying planes early in the morning all week long, part of efforts to control invasive spongy moths. The State Department of Agriculture says the planes might start flying as early as 6.30 in the morning. Authorities say the planes will be applying a substance containing pheromones that disrupt mating. As adults, spongy moths are just emerging for the summer. The treatments have no known effects on humans or animals.