Joint Control Ability of Labidura riparia (Pallas) and Sycanus croceovittatus (Dohrn) Against Ostrinia furnacalis (Guenée)

In order to clarify the control ability of Labidura riparia and Sycanus croceovittatus on Ostrinia furnacalis larvae, the predation ability and preference of L. riparia and S. croceovittatus on the 3rd instar larvae of O. furnacalis were studied in this study. The results showed that the predation ability of the two species to the 3rd instar larvae of O.furnacalis conformed to the Holling II functional response. The combination of L. riparia and S. croceovittatus had the best predation effect on the 3rd instar larvae of O.furnacalis, which was significantly higher than that of L. riparia or S. croceovittatus alone. The L. riparia showed a positive preference for the 1-3 instar larvae and a negative preference for the 4-5 instar larvae. The S. croceovittatus showed a positive preference for the 3-5 instar larvae and a negative preference for the 1-2 instar larvae. In summary, compared with the use of a natural enemy insect alone, the combined use of L. riparia and S. croceovittatus has a more significant effect on the prevention and control of O.furnacalis larvae, and can be used for biological control of O.furnacalis.