ISSN:
1365-3059
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
In an experiment in an unheated glasshouse in which tomatoes were picked for about four months, yields from annually cropped soils decreased from 4.48 to 2·71 kg/plant when soil remained untreated for a second year, the decrease being associated with increasing attack by Pyrenochaeta hcopersici. Partial sterilization in 1966 with chloro-Plcrin or methyl bromide decreased brown root rot (BRR) in previously untreated soil from 60 per csnt to 11 and 12 per cent and increased yields from 2·71 to 4·96 and 4·30 kg/plant respectively. Yields were unaffected when soils, fumigated with methyl bromide in 1965. were partially sterilized with chloropicrin or methyl bromide in 1966. When cylinders of soil 0·23 m diameter and 0·23 m deep, at planting sites within untreated plots were replaced with heat sterilized soil, BRR decreased from 60 to 11 per cent and yields increased from 2·71 to 3·70 kgplant. This effect was attributed to delayed infection of older roots within the sterilized soil, because the slow growing P. lycopersici had to extend further from surrounding infestations. The largest yields (c. 5·85 kg/plant) were obtained, irrespective of soil treatment, from cv. Potentate tomatoes grafted to KN rootstocks resisting P. lycopersici.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-3059.1969.tb00486.x
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