longhorn beetle on Echinocereus Viridiflorus
Quick answer
If your Echinocereus Viridiflorus has longhorn beetle, the most likely cause is: Leo Chance's Cacti and Succulents for Cold Climates names the black longhorned cactus beetle (Moneilema sp.) as the worst beetle pest of succulents and states outright that it will kill Echinocereus and Opuntia; the flightless black adults spread from neighbouring infected cactus populations and chew the stems, which a small clustering Echinocereus viridiflorus cannot easily survive once beetles establish in the colony.
Start here:
- 1. Inspect neighbouring cactus stands for the flightless black adults before planting Echinocereus viridiflorus in a new garden bed, and remove or treat nearby infected Opuntia or Echinocereus populations to cut off the reservoir that Chance warns sustains the infestation.
- 2. Spray affected Echinocereus viridiflorus with neem oil or insecticidal soap, the environmentally benign contact treatments that Chance credits with controlling the beetle and similar cactus pests without harming the plant.
Why Echinocereus Viridiflorus gets longhorn beetle
Echinocereus Viridiflorus
Leo Chance's Cacti and Succulents for Cold Climates names the black longhorned cactus beetle (Moneilema sp.) as the worst beetle pest of succulents and states outright that it will kill Echinocereus and Opuntia; the flightless black adults spread from neighbouring infected cactus populations and chew the stems, which a small clustering Echinocereus viridiflorus cannot easily survive once beetles establish in the colony.
How to reverse longhorn beetle on Echinocereus Viridiflorus
- 1
Inspect neighbouring cactus stands for the flightless black adults before planting Echinocereus viridiflorus in a new garden bed, and remove or treat nearby infected Opuntia or Echinocereus populations to cut off the reservoir that Chance warns sustains the infestation.
- 2
Spray affected Echinocereus viridiflorus with neem oil or insecticidal soap, the environmentally benign contact treatments that Chance credits with controlling the beetle and similar cactus pests without harming the plant.
Keep longhorn beetle off this Echinocereus Viridiflorus
Quarantine new cactus acquisitions away from established Echinocereus viridiflorus for several weeks, keep the planting site clear of nearby infected Opuntia or Echinocereus populations, and reapply neem oil or insecticidal soap at the first sign of new damage so the flightless beetles cannot establish in the colony.