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Growth of Picea sitchensis in old forest nurseries
Author(s) -
REDDY M. A. RAM,
SALT G. A.,
LAST F. T.
Publication year - 1964
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1964.tb01204.x
Subject(s) - biology , fungicide , sterilization (economics) , germination , pythium , seedling , thiram , horticulture , fumigation , soil water , damping off , fusarium , spore germination , pythium ultimum , botany , agronomy , biological pest control , ecology , monetary economics , economics , foreign exchange market , foreign exchange
SUMMARY The poor yield of Sitka spruce ( Picea sitchensis Carr.) seedlings in old forest nurseries at Kennington and Ringwood results from losses of seedlings during germination, and stunted growth of those that survive. Losses, which are attributed mainly to invasion by Pythium spp. and secondarily by Cylindrocarpon radicicola Wr. and Fusarium spp., were decreased by ( a ) partially sterilizing soil with formalin, dazomet or metham‐sodium, ( b ) applying the fungicides maneb and quintozene to soil, and ( c ) dressing the seed with fungicides. In contrast, only partial sterilization increased growth of the survivors. Fungicidal seed‐dressings, which did not affect growth, increased numbers of survivors most in partially sterilized soils, suggesting that soil microfloras developing after partial sterilization controlled seed‐borne pathogens no more effectively than do the microfloras of unsterilized soils. Experiments with transplants indicated that the growth stimulus from partial sterilization operated equally at all stages of seedling development, and was independent of root damage done by parasites.