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Abstract
The addition of 1.0% (wt/vol) ammonium peroxydisulfate to 0.125%, 0.25%, and 0.50% (wt/vol) ethephon sprays, applied before harvest to rutabaga (Brassica napus, Group Napobrassica Mill. cv. Laurentian) nearing commercial size, defoliated a greater percentage of leaves than would be anticipated from the effects of the individual components. Defoliation expressed on the logit scale was a linear function of the square root of the ethephon concentration, if ethephon was applied with or without ammonium peroxydisulfate. Chemical name used: (2-chloroethyl) phosphonic acid (ethephon).
Abstract
The rhizomes of 3 cultivars of tall bearded irises (Iris spp.)—‘Cayenne Capers’, ‘Babbling Brook’, and ‘Stepping Out’—were stored at 2°C for 9, 14, and 18 weeks and then forced to anthesis in a greenhouse. During vernalization, rhizomes were either planted into pots or placed on cooler shelves. Rhizomes of ‘Cayenne Capers’ required no vernalization to develop the flower bud, yet vernalization was required for ‘Babbling Brook’ and ‘Stepping Out’. The longer the vernalization period, the shorter the time to flower after being removed to the forcing environment. Rhizomes not planted during vernalization required more time to flower than those which were planted.