Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 Diseases of Fruits and Nuts 29 effect of brown rot or sliot-bole fungus. In seasons of late s})i-in<i' i-aiii, bacterial gummosis of apricots may attack tbe new growtb and produce many small, dead spots on the leaves and a shiny, black, scabby condition on the tender young shoots. The occurrence of the disease is extremely variable. In some years, there are extensive epidemics and thousands of Fig. 13.—Bacterial gummosis of apricot. trees are killed, especially in the foothill districts. During o
Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 Diseases of Fruits and Nuts 29 effect of brown rot or sliot-bole fungus. In seasons of late s})i-in<i' i-aiii, bacterial gummosis of apricots may attack tbe new growtb and produce many small, dead spots on the leaves and a shiny, black, scabby condition on the tender young shoots. The occurrence of the disease is extremely variable. In some years, there are extensive epidemics and thousands of Fig. 13.—Bacterial gummosis of apricot. trees are killed, especially in the foothill districts. During other seasons, the disease can scarcely be found. If the cankers are not too numerous or too large, they may be cut out, with care to remove all the diseased tissue and disinfect the tools and cuts with the mercuric disinfectant used in pear-blight work (p. 159). Dead or nearly dead limbs should be cut off and dead or badly crippled trees removed. Wounds should be covered with bordeaux paste (p. 157). Whitewashing the trunks of young trees in the fall may prevent some of the infection which develops abundantly during the winter in certain years. The recommendation given for plum trees (p. 109) of keeping the
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