Field slug

Crops affected: As polyphagous pests, they feed on a vast range of plants. Major targets include seedlings of cereal crops, vegetable crops such as lettuce, cabbage, and potatoes, as well as soft fruits like strawberries. They can cause complete destruction of young stands during germination periods.

Biology and life cycle: Field slugs are nocturnal and thrive in moist environments. They are hermaphroditic and can lay hundreds of eggs throughout the season in soil crevices or under decaying plant debris. The life cycle is heavily dependent on moisture and temperature; they remain inactive during hot and dry spells, seeking refuge in damp soil depths.

Nature of damage and harmfulness: The primary damage involves large, irregular holes in leaves, stem stripping, and scarring of tubers or fruits resting on the ground. Beyond mechanical tissue destruction, their mucous trails serve as entry points for various pathogens, leading to secondary infections and rapid decomposition of the affected plant tissue.

Protection measures: Management requires integrated strategies. Essential practices include:

• Removing weed hosts and crop residues to minimize shelter.
• Tillage practices to expose eggs to predators and desiccation.
• Application of iron phosphate-based baits which are safe for beneficial insects.
• Using traps or physical barriers around high-value crops.
• Monitoring population density during wet seasons to time chemical control.