Disease News

Fruit Crops Pathology

Brambles Anthracnose. To control anthracnose on brambles, a delay dormant spray is needed. This is a critical spray. Liquid lime-sulfur at 20 gallons per acre should be applies when new shoots are ¼ to ¾ inches long. The spray may burn the leaves if applied after new shoots are ¾-inch long. For more information, consult the "Midwest Commercial Small Fruit and Grape Spray Guide 2003." Also, detailed information on anthracnose of brambles can be found at the website.

Apple Scab. Early season spray for control of apple scab is essential. The first spray must be applies at green tip. Primary scab spores are mature and disseminated at early bloom. In 2002, some unprecedented apple scab occurred in Illinois (see the pictures). There are several fungicides (i.e., Nova, Sovran, Flint, …) that effectively control apple scab. For more information on control of apple scab, consult "Illinois Commercial Tree Fruit Spray Guide 2003." Also, more information on apple scab is available at these websites: website-1, website-2, and website-3.

New Fungicides for Fruit Crops. Pyraclostrobin (Cabrio 20 EG), a strobilurin fungicide, is manufactured by BASF. This fungicide has been registered for the use on several crops including blackberry, blueberry, caneberry, raspberry, and cherry (sweet and tart). The label information of Cabrio is available at website.

Triflumizole (Procure 50WP), fro Uniroyal Chemical Company, Inc., has received registration for the use on cherries (sweet and tart). This fungicide is effective for control of powdery mildew, blossom blight and fruit rot (Monilinia species), and leaf spot (Blumeriella jaapii). The label information of Procure 50WP is available at website.