Dung flies

These pests primarily target ornamental bulbs, such as daffodils, and various vegetable crops like onions and garlic. The larvae cause direct damage by mining into the plant stems or bulbs. This internal feeding activity interrupts nutrient flow and weakens the plant, making it highly susceptible to environmental stress and secondary infections.

The life cycle of the Scathophagidae involves egg, larval, pupal, and adult stages. Females lay eggs on host plants, and upon hatching, the larvae immediately begin consuming plant tissue. Depending on the species and environmental conditions, the development period can span across several weeks, often concluding with pupation in the soil.

The damage caused by these flies often results in stunted plant growth, yellowing foliage, and structural damage to the stems. As larvae burrow through the tissue, they create channels that allow bacteria and fungi to enter, frequently leading to localized rot. This type of damage is particularly problematic in nursery production and field vegetables.

Effective control measures focus on cultural and chemical practices. Growers should prioritize the destruction of infested plant material and ensure proper field sanitation to eliminate pupation sites. Additionally, rotating crops and using appropriate insecticides during peak flight periods are recommended to minimize damage and preserve crop yields.