Bean, dry-Wireworm

Ctenicera spp. and Limonius spp.

Pest description, crop damage and life history

See:

Pest monitoring Test for wireworms before planting susceptible crops, especially where fallow land is being returned to production.

In the Midwest, bait stations are used widely to monitor for wireworms. An average of one wireworm per bait station might indicate the need for a preventive wireworm treatment. Ask your Extension agent for more information on bait stations. A pheromone is available for the Pacific Coast wireworm.

Management-cultural control

In fields known to contain wireworm larvae, fallowing during the summer with frequent tillage (springtooth or disk) can help. Seriously damaged stands of seedlings may need to be replanted. Use crop rotations to nonhost plants. Do not plant a susceptible host crop following a crop that has had a heavy infestation of wireworm without fallowing/tilling or applying a pesticide. Flooding a field for several weeks may reduce wireworm populations.

Management-chemical control: HOME USE

  • bifenthrin
  • pyrethrins (often combined with other ingredients)-Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin

Management-chemical control: COMMERCIAL USE

  • dichloropropene (Telone II)-Preplant.
  • chlorpyrifos (Lorsban 50WSP) at 8 to 12 fl oz/cwt as slurry treatment.
  • imidacloprid (Gaucho 480F)-Seed treatment. See label for instructions.
  • thiamethoxam (Cruiser 5 FS) seed treatment at 1.28 fl oz per 100 lb of seed. Refer to label for complete instructions.

See: