THE ADVANTAGE OF TBZ PLUS IPRODIONE TREATMENT FOR CONTROL OF GRAY MOLD DECAY OF CELERY CAUSED BY THE HETEROGENIC SPORE POPULATION OF BOTRYTIS-CINEREA IN ISRAEL
R. Barkaigolan et al., THE ADVANTAGE OF TBZ PLUS IPRODIONE TREATMENT FOR CONTROL OF GRAY MOLD DECAY OF CELERY CAUSED BY THE HETEROGENIC SPORE POPULATION OF BOTRYTIS-CINEREA IN ISRAEL, Phytoparasitica, 21(4), 1993, pp. 293-301
A combined TBZ - iprodione treatment was mole effective in inhibiting
growth in vitro of Botrytis cinerea isolates obtained from decayed cel
ery than either of the fungicides applied separately. This was exhibit
ed for both TBZ-resistant and TBZ-sensitive isolates. TBZ at 500 mu g
ml(-1) plus iprodione at 1000 mu g ml(-1) reduced celery decay beyond
the reduction obtained by each fungicide alone. When applied prior to
inoculation, the combined treatment prevented decay by the TBZ-sensiti
ve/iprodione-resistant isolates and reduced initial decay by the TBZ-r
esistant/iprodione-sensitive isolates to 3-10% of the level without tr
eatment. Under natural infection conditions iprodione showed better de
cay control than TBZ, and at 1500 mu g ml(-1) it reduced initial decay
during prolonged storage to 3% of the no-treatment level. Although TB
Z (500 mu g ml(-1)) or iprodione (1000 mu g ml(-1)) applied separately
reduced decay significantly, the combination of lower concentrations
of each fungicide was sufficient to eliminate decay development almost
totally. The combined treatment also inhibited decay by Sclerotinia s
clerotiorum, which contributed 3% of the total soft rot in stored cele
ry.