Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 36 California Agricultural Extension Service [Cm. 120 to the fruit (fig. 20). The disease is not common every year but occa- sionally causes serious losses in seasons when tliere is continuous wet weather during and after the blooming time of apricots. The Tilton variety is rather susceptible because the jackets hang on longer than in other varieties. Fig. rot of apricots on the tips of young fruits. A 'jacket' is still adhering on the center fruit; the rot usually starts under the jacket.
Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 36 California Agricultural Extension Service [Cm. 120 to the fruit (fig. 20). The disease is not common every year but occa- sionally causes serious losses in seasons when tliere is continuous wet weather during and after the blooming time of apricots. The Tilton variety is rather susceptible because the jackets hang on longer than in other varieties. Fig. rot of apricots on the tips of young fruits. A 'jacket' is still adhering on the center fruit; the rot usually starts under the jacket. The fungus which causes green rot is the so-called 'cottony mold' fungus, Sclerotinia sclerotiorum, a snow-white mold which develops upon mustard, vetch, alfalfa, weeds, or any thick-growing surface vege- tation and produces its spores only on the soil (p. 137), whence they are distributed by wind. These spores are produced more or less contin- uously from December to May and are probably abundant every year.
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