Onion seed-Armyworm and cutworm

Beet armyworm (Spodoptera exigua)
Bertha armyworm (Mamestra configurata)

Western yellowstriped armyworm (Spodoptera praefica)
Black cutworm (Agrotis ipsilon)
Variegated cutworm (Peridroma saucia)

Pest description and crop damage Dark or various-color moth larvae that damage roots and bulbs by feeding.

Management-chemical control

  • azadirachtin (Neemix 4.5) at 4 to 16 fl oz/a (0.012 to 0.049 lb ai/a) for armyworm. For cutworm (Neemix 4.5) at 5 to 16 fl oz/a (0.015 to 0.049 lb ai/a). PHI 0 days. REI 4 hr. In most cases, apply at high rate. Effective on larval or immature stages only. This botanical pesticide acts slowly. Repeat in 7 to 10 days as needed. Spray early and check for effect. Some formulations are OMRI-listed for organic production.