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Disease Identification and Control

Figure 8. Dodder, when left uncontrolled, tends to spread farther and farther outward, smothering host plants. When this occurs, host plants are further weakened by multiple vines with penetrating haustoria and an increase in shade caused by dense vine growth. Source: www.gardeningknowhow.com

  

Dodder, a Parasitic Vine Weed

By Bruce Wenning

Not all plant diseases are caused by parasitic microbes, some are caused by parasitic weeds.  The dodder vine is one of those weeds.  Dodder attaches itself to healthy plants and makes them more vulnerable to other diseases and insect pests. Find out all about the dodder lifecycle and best practices for ridding your landscape of this fascinating but noxious vine.

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Sudden Oak Death

by Janice Alexander A plant disease commonly known as sudden oak death is killing trees in the coastal forests of western North America and portions of the United Kingdom and is an emerging threat in other areas. The disease is caused by the exotic, quarantine pathogen Phytophthora ramorum. While sudden oak death has killed a…

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Boxwood Blight Found in Massachusetts

Information provided by UMass Extension, Nursery, and Urban Forestry. In December 2011, the UMass Extension Plant Diagnostic Lab working with samples collected by MA Dept. of Agricultural Resources (MDAR) inspectors positively identified boxwood blight (Cylindrocladium pseudonaviculatum) in Massachusetts. Beginning in early December, MDAR inspectors performed trace forward surveys of nurseries and garden centers identified by…

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