Uhler's stink bug

Systematic position: Chlorochroa uhleri is a member of the order Hemiptera and the family Pentatomidae, commonly known as stink bugs. This species is widely recognized in North America as an agricultural pest due to its feeding habits that negatively impact plant health and development across various developmental stages.

Host plants: The bug is polyphagous, meaning it feeds on a diverse range of plant hosts. Economically significant crops that are frequently attacked include wheat, barley, corn, soybeans, and various fruits and vegetables. Their ability to move between different host plants throughout the season makes them difficult to manage in diverse cropping systems.

Biology and life cycle: The life cycle consists of three primary stages: egg, nymph (with five instars), and adult. Adult bugs overwinter in protected areas, including leaf litter and field margins. Upon the arrival of warmer temperatures, they emerge to feed on wild hosts before migrating to cultivated crops, where mating and egg-laying occur in clusters on foliage.

Damage and pest status: Feeding damage is caused by the piercing-sucking mouthparts which inject enzymes into plant tissues, leading to cell death.

• Reduction in crop yield.
• Deformation of grain and fruits.
• Stunting of plant growth.
• Formation of necrotic spots on leaves.
• Increased susceptibility to plant pathogens.

Control measures: Management of Chlorochroa uhleri relies on integrated pest management (IPM) strategies. This includes regular field scouting to monitor population density and timely weed control to eliminate overwintering sites. In cases of severe infestations, targeted insecticide applications are recommended, ensuring that the timing coincides with the most vulnerable life stages of the pest.