Savigny's desert locust

Systematic position. Pseudosphingonotus savignyi belongs to the order Orthoptera, family Acrididae. This species is a characteristic member of desert and semi-desert ecosystems, having evolved to thrive in environments with low humidity and high temperature fluctuations, which often poses a threat to adjacent agricultural lands.

Crops and damage. As a highly polyphagous insect, this locust attacks various agricultural crops including cereals, fodder grasses, vegetables, and cucurbits. The insects consume foliage, stems, and fruits, often causing total defoliation. High densities of these locusts can result in severe yield losses, negatively impacting food security and forage availability.

Biology and lifecycle. The life cycle involves incomplete metamorphosis consisting of egg, nymph, and adult stages. Females deposit eggs in the soil within protective pods. After hatching, nymphs undergo several developmental stages, during which they feed ravenously on available vegetation. Adults are strong fliers, allowing them to migrate long distances in search of fresh food sources.

Pest significance. The main threat posed by Pseudosphingonotus savignyi is its potential for explosive population outbreaks. During such outbreaks, the locusts form large swarms capable of devastating crops over extensive areas in a very short time. Constant surveillance is necessary to detect population surges before the insects reach the winged stage and become highly mobile.

Protection measures. Control strategies focus on integrated pest management (IPM). Key actions include:

• Mechanical soil cultivation to destroy egg pods.
• Monitoring of nymphal density in breeding grounds.
• Application of targeted insecticides when nymphs are in their early stages.
• Maintenance of natural barriers and monitoring of migration routes.