Copper Azole Treated Wood Vegetable Garden

Sally brown a research assistant professor of soils at the university of washington knows her way around both food and metals.

Copper azole treated wood vegetable garden.

Raised vegetable bed with treated wood. Manufacturers of pressure treated wood with micronized copper quaternary claim that their lumber won t leach any copper into the soil and therefore it s safe for all uses including making garden beds. Soil experts disagree on using copper treated wood products in a vegetable garden. And micronized copper quaternary or mcq.

Joe mabel wikimedia commons there is a long standing controversy in the field of organic gardening. Copper azole ca. Wood that isn t pressure treated tends to rot fairly quickly in contact with the soil. It is widely used throughout the united states and canada.

Ca is a water based preservative that can be cleaned and painted. Can pressure treated wood be used as part of an organic vegetable garden. Studies have shown that arsenic from wood treated with cca leaches into the soil and that copper although much less toxic leaches from acq and copper boron azole cba a variant of ca b. Copper azole is a water based wood preservative that prevents fungal decay and insect attack.

In 2013 most pressure treated wood used copper based compounds including copper azole or ca. Copper azole treatments contain copper boric acid and tebuconazole type b does not contain boric acid. In a 2014 study wood research scientists love gardner and morrell at oregon state university found that in growing radishes carrots and potatoes in a copper azole treated douglas fir planter the copper levels were not higher in roots or tubers of radishes carrots or potatoes compared to beds constructed from untreated wood. Lamiot wikimedia commons pressured treated.

Type a contains copper boric acid and tebuconazole while type b only contains copper and tebuconazole. In a 2014 study wood research scientists love gardner and morrell at oregon state university found that in growing radishes carrots and potatoes in a copper azole treated douglas fir planter the copper levels were not higher in roots or tubers of radishes carrots or potatoes compared to beds constructed from untreated wood. Copper azole and alkaline copper quaternary contain fungicide and copper but not arsenic. The copper works to deter insects while the.

The copper deters insects and the fungicide prevents soil rotting the lumber. It is a fungicide and insecticide. Here s what i know.