Hundreds of thousands of armyworms have attacked crops in Bataan and Batangas, affecting a huge area of agricultural land that produces rice, fruits and vegetables. In Mariveles alone, more than 10 hectares of land planted with various crops have been completely destroyed by hornworms, armyworms and cutworms. Also attacked by the worms are the towns of Morong and Limay in Batangas.
The worms have likewise destroyed grasslands making the area barren and useless for grazing.
The adult armyworm is a light brownish grey moth with a conspicuous white spot about the size of a pinhead on each front wing. When expanded, the wings are about 2 inches across. – ?