Calephorus compressicornis

Calephorus compressicornis is a species of grasshopper belonging to the family Acrididae, order Orthoptera. This insect is recognized as a specialized pest that thrives in humid environments, particularly in wetlands and irrigated agricultural landscapes, making it a significant concern for rice producers.

The primary host crops for this species include rice (Oryza sativa) and various semi-aquatic grasses found near irrigation canals. The pest is specifically adapted to these conditions, allowing it to maintain stable populations in areas where moisture levels remain consistently high throughout the growing season.

The biology of Calephorus compressicornis follows a hemimetabolous development cycle. Eggs are typically laid in the soil or in dense plant debris near water sources, where they overwinter. After hatching, the nymphs go through several molting stages, gradually developing into winged adults, while maintaining a constant need to feed on vegetation.

The damage caused by this pest is primarily characterized by the consumption of leaf blades. Nymphs and adults feed on the rice foliage, causing ragged leaf margins and, in severe cases, complete defoliation. This reduction in leaf area significantly impairs the plant's ability to photosynthesize, resulting in stunted growth and reduced grain yield.

Effective management requires an integrated approach to pest control. Recommended strategies include:

• Removal of weeds and host grasses from irrigation infrastructure.
• Strategic flooding of rice fields to disrupt the life cycle.
• Monitoring of nymphal density to determine the necessity of treatment.
• Targeted use of systemic or contact insecticides when population thresholds are exceeded.