Armoured bush cricket

Systematic position. Acanthoplus armativentris, commonly referred to as the armoured bush cricket, belongs to the order Orthoptera and the family Tettigoniidae. This insect is well-known for its aggressive behavior and distinctive heavy exoskeleton, which is covered with sharp spines. These physical adaptations serve as a formidable defense mechanism against predators in their native southern African habitats.

Crops damaged. As a polyphagous pest, the armoured bush cricket feeds on a wide variety of plant species. Primary agricultural targets include cereal crops like maize, millet, and sorghum. Furthermore, these insects frequently attack horticultural crops, vineyards, and fruit trees, consuming leaves, soft stems, and developing fruits, which often results in severe economic damage for local farmers.

Biology and life cycle. The life cycle of this species is adapted to arid environments. Eggs are laid deep into the soil by females and can remain dormant for extended periods during unfavorable conditions. Once environmental cues trigger hatching, the nymphs emerge and progress through several instars. Throughout their development, they gain their characteristic armor-like appearance and voracious feeding habits.

Nature of damage and pest status. The pest status of Acanthoplus armativentris is defined by their tendency to form large, swarming populations. When occurring in high numbers, they cause extensive defoliation and can strip crops bare within a short period. Their damage is not limited to leaves; they often chew through stems and stalks, causing structural damage to plants and disrupting the vascular flow of nutrients.

Control measures. Integrated Pest Management (IPM) is essential for mitigating the impact of these crickets. Recommended strategies include:

• monitoring population density during early spring;
• deep tillage of soil to disturb and destroy egg pods;
• application of perimeter insecticide barriers to prevent migration into fields;
• use of targeted bait stations containing stomach-action insecticides for effective population reduction.