Aulocara

Aulocara is a genus of grasshoppers belonging to the family Acrididae. These insects are well-known in the arid regions of North America, where they function as significant pests of rangeland grasses and occasionally threaten agricultural field crops.

The primary hosts for Aulocara species are various species of native grasses. By consuming large quantities of forage, these grasshoppers directly compete with livestock for grazing resources. When rangeland vegetation becomes scarce, they can move into adjacent wheat fields or other cereal crops, causing severe economic losses for farmers.

The life cycle of Aulocara is characterized by a single generation per year. Females lay their eggs in the soil, protected by a pod. These eggs undergo diapause during winter and hatch in the spring. The nymphs go through five instars, during which they feed voraciously on young vegetation before reaching the winged adult stage.

The damage caused by Aulocara is characterized by widespread defoliation. High densities of these grasshoppers can strip a field of all green cover in a matter of days. This not only results in the loss of current year's biomass but can also inhibit plant regrowth and promote soil erosion in overgrazed pastures.

Effective management strategies for Aulocara involve a combination of monitoring and preventive actions:

• Regular scouting for nymphal development during early spring.
• Application of bait or spray insecticides when threshold levels are exceeded.
• Utilizing biological control agents, such as specific fungi (e.g., Beauveria bassiana).
• Implementing range management practices to reduce favorable egg-laying habitats.
• Targeted application of reduced-rate insecticides to minimize impact on non-target species.