Inhibitors of Deuterophoma tracheiphila in Citrus Varieties Resistant to "Mal Secco"

Science  23 Mar 1962:
Vol. 135, Issue 3508, pp. 1066-1067
DOI: 10.1126/science.135.3508.1066


Growth of colonies of the fungus Deuterophoma tracheiphila, the causal agent of the "mal secco" disease of lemons, is inhibited by two substances, C1 and CS2, which are found in resistant mandarin varieties but not in susceptible lemons and related species. Some properties of these substances are reported. CS2 may be naringenin, but the stronger inhibitor, C1, has not yet been identified.