ISHS Acta Horticulturae 177: IV International Symposium on Flower Bulbs
GLADIOLUS ROT CONTROL EXPERIENCE |
| Authors: | Zlata K. Šmit, M. Ševar |
| Abstract:
The efficacy of gladiolus corms pre-plant dip treatment in: captan, thiram, folpet (0.2), benomyl (0.2), thiabenda zole (0.09 and 0.18), prochloraz with or without Mn complex (0.08), or the combination of first two with benomyl (0.13), active material in the suspension, in prevention of the corm rot, was investigated. Reduction of healthy plants was noticed only 3 months after planting (72.7) and 40 percent loss, compared to 93 in untreated plot. Even one single early treatment gave effective protection evident by: increase in total yield, in number of healthy corms, plant vigour, number of cormelles formed and higher incidence of a bigger corm size. The highest loss reduction was obtained with captan plus benomyl treatment 92 percent of survival and 26 percent of loss. Folpet and thiabendazole enabled 80 percent survival but 50 and 40 percent losses, respectively. Greatest yield (11.5 times to control one) of healthy corms was achieved using captan or thiram combinations. Decrease of captan at 0.2 percent in combination, 7.3 times lower yield was obtained as with folpet. The efficacy reached 72 percent only for captan plus benomyl, and 69, for prochloraz treatment. The careful survey of diseased corms indicated the highest presence of Fusarium oxysporum Schl. f. sp. gladioli (Mass.) Snyder and Hansen, high of F. moniliforme Sheld. var. subglutinans Wr. and Reink, low of Sclerotinia draytoni Buddin and Wakef and sporadical of Penicillim spp., Stromatinia gladioli (Drayt.) Whet and Septoria gladioli Passer. | |
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