Japanese wood mouse

Systematic position: The Japanese wood mouse (Apodemus speciosus) belongs to the order Rodentia and the family Muridae. It is a common rodent species native to Japan, which often transitions from forest habitats into agricultural lands, becoming a significant threat to various food crops.

Damaged crops and impact: This species infests grain fields, including wheat, barley, and rice crops. They feed on seeds, seedlings, and maturing grains, causing significant yield losses. In agricultural settings, they are also known to strip bark from fruit trees, which can stunt tree growth or lead to the death of young orchards.

Biology and development: The Japanese wood mouse is highly reproductive, capable of multiple litters per year under optimal environmental conditions. They are nocturnal and create complex burrow systems, which provide protection from predators and storage space for gathered food, allowing them to survive and multiply quickly in fields.

Nature of damage: The damage caused by these mice is twofold: direct consumption of agricultural products and environmental degradation of the fields. By digging, they disturb soil structure, and by contaminating crops with droppings, they decrease the market value and safety of harvested grains stored in granaries or silos.

Protection measures: Management of this pest requires an integrated approach to reduce population density:

• Implementing crop rotation to disrupt the mice's feeding cycle.
• Using rodenticides in controlled bait stations to prevent secondary poisoning.
• Protecting young tree trunks with physical mesh guards.
• Promoting habitats for natural predators like owls and snakes in the area.