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Show Horticultural 1 DISEASE INJUReTraspSy Attacks Canes of Plant Primarily but MV Also Spre to Leaves-Caused Leaves-Caused by Fungus. ri,H,s1",HCn0Se 1Se f tlle Be- cli.M,11SeS altackinc raspborries. "'o a ee.s bluckberrle,. bu? the in nrrlv , U,eSe Plunts is nt h l o, b 'ei'e- the disease njurp. the ennos of the phmts pri.nar- y. U may n so attack the leaves, the ems t, the,.frulls the fruit tm ' Ihe d'seased parts of the y be killed outright, or, they are not killed, the fruit may be proventod from forming, or if It does lorm, it may be rendered unfit for consumption. con-sumption. Antimu.noSe is caused by a fungus which lives for the most "part as" a mjcellura or root-like body Inside of the host. Here it feeds at the expense ex-pense of the plant tissue, with the consequence that this part of the plant dies. The disease makes its appearance ap-pearance on the lower parts of the new canes of the raspberry plants, but later It works upward. The first conspicuous con-spicuous symptom of the disease consists con-sists of small, purplish spots on the canes, but as these become older, they Increase in size and their centers become be-come grayish white. As time goes on neighboring spots may enlarge until they coalesce. Should such areas encircle en-circle a cane, girdling results. Frequently, Fre-quently, badly diseased stems become rough, scabby, and even cracked. Such canes cannot function normally and they either die or continue to survive in a weakened condition. If they produce pro-duce fruit, the berries ripen prematurely prema-turely and they are small and dry. The leaves, leaf stems and fruit stems are also affected by this fungus, the disease making its appearance here in the form of the characteristic spots described above. The life cycle of the organism causing caus-ing anthracnose Is not yet completely 1 viflVir Cluster of Autumn Fruiting Raspberry. known, but it is generally agreed that the winter is passed in the disease canes and that the disease is spread by means of spores. |