What field hero can attack up to 40% of bertha armyworm per year?
Answer: Banchus flavescens
Parasitism of bertha armyworm by Banchus flavescens may exceed 40% in some years.
Source: Wylie, H.G., and Bucher, G.E. 1977. The bertha armyworm, Mamestra Configurata (Lepidoptera: Noctuidae). mortality of immature stages on the rape crop, 1972–1975. The Canadian Entomologist. 109: 823-837.