spotsport.blogg.se - Boxwood blight

Do not work in area if boxwoods are wet to prevent the spread of fungus. Mulch boxwoods to reduce the spread of disease to foliage from splashing water.

Choose cultivars with an open-growth habit for better air circulation.

If temperatures are over 60 degrees post-season and rain is expected, continue the fungicide treatments. Continue preventative applications throughout the growing season every one to two weeks per label instructions. Fungicides with chlorothalonil are recommended for the home gardener.

Begin preventative fungicide spray program on any susceptible boxwood.

Sanitize all tools, equipment, tarps, shoes, gloves, spray hoses and exposed areas of vehicles with either Lysol Concentrate Disinfectant (1.25 oz./gal.) or household bleach (1 part bleach/9 parts water).

Bag diseased boxwood, leaf debris and soil, and take to a landfill.

If leaf debris has been worked into the soil, remove 8 to 12 inches to help eliminate the pathogen.

(See chart for boxwood levels of susceptibility.) Do not plant susceptible boxwood varieties where the diseased boxwood was removed. However, this will not eliminate the pathogen from the area, since it can persist in the soil for five or six years.

Remove promptly any diseased plant, along with its leaf debris.

The Virginia Cooperative Extension keeps track of where outbreaks occur and the source of the diseased plant material. It is important to seek a confirmatory diagnosis because the symptoms could be mistaken for other less serious problems such as winter burn or volutella leaf blight. Take cuttings of symptomatic boxwood, double-bag them in plastic bags and take them to the county Virginia Cooperative Extension office, 12011 Government Center Pkwy, 10th fl., Fairfax.

If you suspect boxwood blight in your landscape When taking down holiday decorations, double-bag boxwood greenery and dispose of it in a landfill. Do not use boxwood greenery near landscape boxwood. Be aware: Boxwood greenery used for holiday decorations could harbor the boxwood blight pathogen.Continue to monitor all boxwood, established and new, for any symptoms.

Before planting, carefully inspect plants for symptoms: leaf spots and black streaks on stems.The nurseries are also inspected by the Virginia Department of Agriculture and Consumer Services. In this program, nurseries must follow strict management practices to minimize the spread of the pathogen. When purchasing boxwood for your home, ask nursery personnel if their producers participate in the Boxwood Blight Cleanliness Program.Brown leaf spots on pachysandra have tested positive for the boxwood blight pathogen. Infected plants of these species can introduce the disease to boxwoods in the landscape. Pachysandra terminalis (Japanese spurge), Pachysandra procumbens (Allegheny spurge), and Sarcococca species (sweetbox) which are in the same family (Buxaceae) as boxwood, are also susceptible to boxwood blight. Most resistant (recommended for new plantings)ī. Susceptibility of 24 commercial boxwood cultivars to boxwood blightī. See the chart below to learn the susceptible and resistant varieties of boxwood. After three weeks or so, symptoms may develop, especially after a period of rain that can activate the disease. According to Bordas, boxwood purchases from garden centers may at first look healthy from the use of fungicides by commercial growers. Black streaks on stemsFungicides used by commercial nurseries can mask the symptoms.