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Abstract
SUMMARYBatches of onion seed were fumigated with dosages of 1,000 or 2,000 mg.hr/1. of methyl bromide at 18°C for the control of stem eelworm (Ditylenchus dipsaci (Kühn) Filipjev). The subsequent effects of these fumigations on germination and seedling vigour were tested under standard laboratory and simulated cool spring conditions. Cool spring conditions lessened germination by up to 12·4 per cent compared with a standard laboratory test, while fumigation at the lower dosage rate caused up to a further 11·5 per cent reduction but had little effect on seedling vigour. The higher dosage rate severely affected percentage germination and caused some loss of vigour.
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