Life Cycle: 

• The Western (WCR) & Northern (NCR) have similar life cycles
• One generation per year, with larvae hatching in late May to early June – completing three developmental stages (instars)
• Pupation occurs in mid-to late July, adults emerge shortly after
• Adults will mate and lay eggs in August/September
• Females lay 400-500 eggs in clutches of ~80 over several weeks

Injury:

• Larvae will feed on corn roots, reducing the ability to uptake water/nutrients as well as decreasing standability
• Adults will feed on silks, pollen from soybean & several weeds as well as the outer layer of corn leaves (WCR) if necessary

Control Options:

1.Crop rotation – Soybeans, alfalfa, etc.

2.Pyramided Bt trait strategy – STX, Duracade, etc.

3.Soil applied insecticide

4.Foliar adult control to reduce beetle number – timing is critical