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Tolerance of aggressive and non‐aggressive isolates of Ceratocystis ulmi to organotin fungicides
Author(s) -
Eng George,
Acholonu Alexander D W
Publication year - 1991
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590050211
Subject(s) - ceratocystis , chemistry , moiety , dutch elm disease , fungus , fungicide , stereochemistry , botany , biology
Abstract The effect of triorganotin compounds, R 3 SnX, on the growth of three wild strains of Ceratocystis ulmi (C. ulmi) fungus, two aggressive and one non‐aggressive strains, was evaluated in shake culture. In all cases, the triphenyltins were the more effective organotins for the inhibition of C. ulmi in vitro . The anionic group, X, did not have a significant role in the inhibition, suggesting that the species involved in the inhibition is the triphenyltin moiety (Ph 3 Sn + ) or the hydrated triphenyltin moiety (Ph 3 Sn(H 2 O) + 2 ). It is further suggested that the triphenyltin species Ph 3 SnOH and Ph 3 SnOAc are the preferred compounds for the control of Dutch elm disease. The tolerance of aggressive isolates to fungitoxins appears to depend more on the nature of the fungicide than on the type of fungus.