Eurphorbia and Carpenter Bees - Knowledgebase Question

San Diego, Ca
Question by gardensmith
July 25, 2006
Do Eurphobia x Martini go dormant or die back after blooming?
Also I want to plant a Geigera (Austrailian Willow) but have Carpenter Bees in the neighborhood. Is this tree a safe choice? Is there an organic solution to the pest?
Thank you, Ann


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Answer from NGA
July 25, 2006

0

Euphorbia x Martini is an evergreen perennial. Austrailian willow will grow well in your gardening region. As for carpenter bees, they typically attack fence posts, telephone poles, etc. rather than live trees. Infestations are usually first detected by finding large amounts of sawdust droppings on the ground below the area being drilled or by observing bees going in and out of the round, circular holes in the wood affected. These bees attack all species of dried, seasoned wood, preferring softwoods such as cedar, redwood, cypress, pine and fir. Nail holes, exposed saw cuts and unpainted wood are attractive nesting sites. They may refurbish an existing tunnel instead of boring a new one or new tunnels may be constructed near old ones with infestations persisting for several years. There are no organic control measures for carpenter bees. Homeowners can use liquid sprays of carbaryl, diazinon, propoxur (Baygon), pyrethrins and resmethrin. Always read the label and follow directions and safety precautions.

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