Rice grasshopper

Hieroglyphus anulicornis is a significant insect pest belonging to the order Orthoptera and the family Acrididae. Known primarily as the rice grasshopper, this species is a major threat to agricultural productivity in various parts of the world, particularly in South and Southeast Asia.

The primary host plants for this species include rice, sugar cane, maize, and several other cereal crops. Both nymphs and adults are voracious feeders, consuming leaves and tender stems. Their feeding habit causes severe physiological stress to the plants, reducing grain yield and biomass production significantly.

Regarding its biology and life cycle, the insect typically undergoes one generation per year. Females deposit their egg pods in the soil, often near the edges of fields or in uncultivated areas. The eggs remain in diapause through the dry season and hatch synchronously when moisture levels increase, leading to mass emergence.

The nature of damage consists of leaf tissue removal, which can vary from minor shredding to complete defoliation. High population densities of Hieroglyphus anulicornis can lead to total crop failure, as they strip fields bare. This makes them a critical concern for smallholder farmers and large-scale agricultural enterprises alike.

Integrated Pest Management (IPM) is essential for controlling this grasshopper. Effective strategies include:

• mechanical destruction of egg pods via post-harvest plowing
• managing alternate weed hosts around irrigation ditches
• utilizing biological control agents or chemical insecticides applied at the early nymphal stages for maximum efficacy