Lesser bandicoot rat

Systematic position: The lesser bandicoot rat (Gunomys gracilis), also classified as a subspecies of Bandicota bengalensis, belongs to the family Muridae and the order Rodentia. It is a highly destructive rodent species primarily known for its extensive burrowing habits and significant impact on agricultural productivity in its native range.

Crops affected: This rodent poses a severe threat to major staple crops, including rice, wheat, maize, and sugarcane. Its ability to feed on various plant parts, from germinating seeds to mature grain, makes it a year-round threat in intensive agricultural landscapes, causing economic losses both in the field and during post-harvest storage.

Biology and life cycle: These rats are primarily nocturnal and live in complex burrow systems that provide refuge from predators and extreme climate conditions. They are prolific breeders, with the capacity to reach maturity quickly. Under optimal feeding conditions, the population can expand rapidly, supported by multiple litters per year, ensuring their survival even under control pressure.

Damage and pest status: The damage is characterized by extensive tunneling, which disrupts irrigation channels and physically weakens plant root systems. By cutting stems and hoarding grains inside their nests, they reduce crop yields significantly. Furthermore, their presence on farmland is associated with the spread of zoonotic diseases, creating additional risks for agricultural workers.

Control measures: Integrated Pest Management (IPM) is essential to mitigate the impact of this species:

• Regular destruction of burrow entrances through deep plowing and tilling.
• Implementation of poison baiting programs using safe and effective rodenticides.
• Keeping field edges and irrigation canals free from dense weeds.
• Promoting the presence of natural predators, such as birds of prey and snakes, within the farming ecosystem.