Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 Diseases of Fruits and Nuts 47 occur in other states but none have been positively recognized in Cali- fornia. They have typical characteristics of virus diseases: yellow, mot- Fig. 23.—J, Raspberry 'niibbms'; B, 'redberry' of Himalaya blackberry, caused by a blister mite. tied, deformed, or curled leaves and stunted growth. Most diseases of this kind are spread by aphids from plant to plant. Care should be taken

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