Swollen petiole/leaf base

Swollen petiole/leaf base

Broccoli Bacteria Rot  Broccoli Bacteria Rot

Broccoli Blind Head  Broccoli Blind Head

Broccoli Head Scar  Broccoli Head Scar

Broccoli Malformed  Broccoli Malformed

Broccoli Multi Shoot  Broccoli Multi Shoot

Broccoli Petiole Scar  Broccoli Petiole Scar

Broccoli Pucker  Broccoli Pucker

Broccoli Scar  Broccoli Scar

Broccoli Swolen Buds  Broccoli Swolen Buds

Broccoli Swolen Petioles  Broccoli Swolen Petioles

Brussels Sprouts Pucker  Brussels Sprouts Pucker

Canola  Canola

Canola Pods  Canola Pods

Cauliflower Pucker  Cauliflower Pucker

Cauliflower Scar Head  Cauliflower Scar Head

Collard Puckering  Collard Puckering

Green Cabbage Scar Head  Green Cabbage Scar Head

Green Cabbage Pucker  Green Cabbage Pucker

Red Cabbage Multi Head  Red Cabbage Multi Head

Red Cabbage pucker  Red Cabbage Pucker

Symptoms on Crops

Swede Midge Damage on Crops

For full size images click thumbnails to the bottom left side of this page

• Puckered and crinkled leaves

• Leaf puckering can give a drawstring effect

• Swollen tissue of leaf petioles/bases

• Brown scarring at the growing point

• Distorted growing points including twisting

• Presence of secondary bacterial rots

Swede midge damage increases:
  • as the number of larvae feeding per plant increases
  • the earlier in development that the plant is infested (i.e. damage pre head formation is more damaging because it could result in blind heads)
  • later in the season as the population builds
  • in sheltered areas near hedgerows, buildings, treelines, etc. where populations tend to build



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