Anthracnose And Gray Bark of Red Raspberries Identification And Control
Anthracnose And Gray Bark of Red Raspberries Identification And Control
H W Harry Warren Anderson
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383 [September, These typical anthracnose lesions on the actively growing parts are sunken and the fungus extends rather deeply into the tissues of the host. They are quite different from the superficial lesions which appear later in the season on the canes which are to produce the crop the fol- lowing year. They will be referred to as "pit lesions" to distinguish them from the lesions described below. Superficial Lesions. During midsummer no new lesions are to be seen on the developing canes a...nd the pit lesions become inconspicuous. An examination of many plantations in late July, 1931, failed to re- veal any evidence of the "gray bark" disease. In late August, however, the disease was plainly evident. At this time small, rather indefinite, purplish areas were noticed (Fig. 4). These later developed into the typical gray areas described above. These lesions are quite distinct from the typical anthracnose pit lesions formed in the spring. Harris 1 has called them "superficial" lesions and this name will be used in the future to designate these late, gray, superficial areas.
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