Navel orangeworm

Amyelois transitella

Young worms are reddish orange and later appear cream-colored, although their diet can influence coloration. They have a crescent-shaped scleriteon each side of the second body segment behind the head. As the worm matures, the head becomes reddish brown. Adult moths range from 1/2 to 1 inch (1.5-2.5 cm) long with a snoutlike projection at the front of the head. Most moths have gray forewings with black markings, though actual shades of grey vary from light grey to almost black, and the black markings (or wing scales) often rub off when moths get old or get caught in pheromone traps. Females begin egg laying about 2 nights after emergence. Eggs are laid on mummy nuts or on new crop nuts.

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