Sand termite

Systematic position: The sand termite (Psammotermes hybostoma) belongs to the order Isoptera and the family Rhinotermitidae. It is a social insect species highly adapted to arid and semi-arid environments across North Africa and the Middle East, where it constitutes a major economic challenge for agricultural development.

Crops affected: As a polyphagous pest, this termite attacks a wide range of agricultural commodities. Significant damage is reported in cotton, sugarcane, and various cereal crops. Furthermore, it poses a severe threat to young orchard plantations, particularly date palms, as it aggressively attacks root systems and the base of tree trunks in search of cellulose.

Biology and life cycle: The species operates through a complex caste system comprising workers, soldiers, and reproductives. Psammotermes hybostoma thrives in sandy soils, where it constructs extensive subterranean tunnel networks. These galleries allow the colony to expand over large areas and access moisture and food sources while remaining protected from extreme surface temperatures and predation.

Damage and pest status: The damage is primarily caused by worker termites that feed on roots, stems, and sometimes even the pith of growing plants. The infestation is often cryptic, meaning plants may show signs of wilting or death long after the termites have destroyed the root architecture. This delayed discovery often leads to massive economic losses, exacerbated by the introduction of opportunistic pathogens through the wounds caused by the termites.

Control measures: Effective management of Psammotermes hybostoma is challenging due to its subterranean nature. Agronomic strategies include:

• Seed treatment with systemic insecticides to prevent early-stage damage.
• Installation of chemical soil barriers around vulnerable crops.
• Field sanitation by removing plant debris and dead wood that serves as a food reservoir.
• Regular monitoring of soil activity and the use of insect growth regulators (IGRs) within baits to suppress colony growth.