Premium
Benomyl tolerance in isolates of Botrytis cinerea from tomato plants
Author(s) -
FLETCHER J. T.,
SCHOLEFIELD SUSAN M.
Publication year - 1976
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1976.tb00589.x
Subject(s) - benomyl , botrytis cinerea , biology , fungicide , botrytis , horticulture , population , botany , demography , sociology
SUMMARY Three hundred and forty‐nine isolates of Botrytis cinerea were collected from tomato crops on forty‐one nurseries and 173 (40/6 %) were found to be tolerant to benomyl. There was no obvious association between disease incidence and the occurrence of tolerance. In a fungicide comparison experiment on tomatoes in 1973, twenty of the sixty‐four (31 %) isolates examined were benomyl tolerant, the majority of these were from benomyl sprayed plants. In 1974 in a similar experiment, 384 of the 394 (97‐5 %) isolates examined were tolerant. Tolerance was monitored in two tomato experiments in relation to a spray programme in which benomyl and dichlofluanid were used in various combinations. There was no marked effect of the spray programmes on the incidence of tolerance on either site. In the experiments B. cinerea was controlled and significant increases in yield were obtained with benomyl in 1973 but not in 1974. This difference is attributed to the change in the pathogen population with a large increase in the incidence of tolerance on the experimental site in 1974.