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‘Guardian’ is a seedless, medium‐sized (12 m x 3 m) tree that provides a fastgrowing, vercal element to the prairie landscape. Its growth rate is similar to other columnar aspen poplars. Young trees may require some shearing to develop the desired fullness.

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Description

Disease resistance is a connuum that ranges from complete suscepbility to immunity. Bronze leaf disease (BLD) is a fungal disease, spread by wind‐blown spores, that has decimated stands of Swedish aspen and Tower poplar across the prairie provinces.

Fortunately a new contender has emerged in the bale against BLD. ‘Guardian’ columnar aspen presently offers a high level of resistance to BLD. When ‘Guardian’ was grown beside suscepble Swedish aspen under Manitoba nursery condions, the difference in disease response was obvious.

‘Guardian’ is a seedless, medium‐sized (12 m x 3 m) tree that provides a fastgrowing, vercal element to the prairie landscape. Its growth rate is similar to other columnar aspen poplars. Young trees may require some shearing to develop the desired fullness.

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