Beet Armyworm

These worms feed in thecrownof the plant and can severely stunt or kill seedlings. The potential for damage is reduced between thinning and head formation. Once heads form, beet armyworms may cause serious damage by boring in from the bottom of the head which means that damage cannot be seen from above. In the San Joaquin Valley, fall populations are much more damaging than spring populations. In the central coast, beet armyworm damage starts to appear in late summer. In the low desert valleys,