Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 116 California Agricultural Extension Service [Cir. 120 finally wither and die. The trouble starts in certain spots in the orchard and keeps spreading, killing more and more trees. The characteristic, white, felty growth of the fungns is seen between the wood and bark of the roots and base of the trunk. Large clumps of light-tan toadstools come up around the base of badly affected trees in late fall. For treatment see page 144. There is a fair chance of finding a resist- Fig. 63.—Hail marks on plum.
Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 116 California Agricultural Extension Service [Cir. 120 finally wither and die. The trouble starts in certain spots in the orchard and keeps spreading, killing more and more trees. The characteristic, white, felty growth of the fungns is seen between the wood and bark of the roots and base of the trunk. Large clumps of light-tan toadstools come up around the base of badly affected trees in late fall. For treatment see page 144. There is a fair chance of finding a resist- Fig. 63.—Hail marks on plum. ant root for prune ti-ees among some of the myrobolans, strains or indi- viduals of which sliow considerable resistance. Tests are being made in many places. For furtlier information address the Division of Plant Pathology, College of Agriculture, Berkeley. Plum Pockets.—T'he fruit becomes puffy and enlai-ged to several times its natural size by the attack of the fungns, Taphrina pruni, which is similar to tliat which causes ])each leaf curl. The disease is very rai-e on cultivated species in California and seldom seen except on one of the native plums. Primus suhcordata.
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