Brassica pod midge

Common Name:

Dasineura brassicae is commonly known as the cabbage gall midge.

Appearance:

Adults: The adult cabbage gall midge is a small fly, measuring only a few millimeters in length. It typically has a black or dark brown coloration.
Larvae: The larvae are maggot-like and are the primary damaging stage. They are tiny and legless, with a pale color.

Host Plants:

Dasineura brassicae primarily infests plants in the Brassicaceae family, which includes cabbage, broccoli, cauliflower, and other cruciferous crops.

Life Cycle:

The life cycle of Dasineura brassicae typically involves multiple generations per year. The adult female lays eggs on or near the developing buds of host plants. The hatching larvae then feed on the plant tissue, causing the formation of galls (abnormal growths) that protect and house the larvae. The larvae pupate within the galls, and the adults emerge to continue the cycle.

Damage:

The larvae of Dasineura brassicae cause damage by feeding on the developing buds and causing the formation of characteristic galls. This feeding activity can lead to distorted and stunted plant growth, affecting the quality and yield of the crop.

Management: Management of cabbage gall midge infestations involves integrated pest management (IPM) strategies. Some common approaches include:

Cultural Practices: Crop rotation and removing crop residues can help reduce the buildup of cabbage gall midge populations.
Biological Control: Natural enemies, such as parasitic wasps, can play a role in controlling cabbage gall midge populations. Conservation of natural enemies is often encouraged.
Chemical Control: Insecticides may be used to control cabbage gall midge infestations, but careful consideration should be given to the timing of applications and the potential impact on beneficial organisms.
Resistant Varieties: Planting cabbage varieties that are less susceptible to cabbage gall midge infestations can be an effective preventive measure.