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The pathogenicity and increase of Heterodera rostochiensis on tomato cultivars, self‐rooted or grafted on to rootstocks.
Author(s) -
HESLING J. J.,
ELLIS P. R.
Publication year - 1972
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.1744-7348.1972.tb05089.x
Subject(s) - rootstock , heterodera , biology , lycopersicon , cultivar , nematode , crop , horticulture , globodera rostochiensis , agronomy , botany , ecology
SUMMARY Self‐rooted tomatoes ‘Ailsa Craig’ and ‘Kingley Cross’, and scions of ‘Ailsa Craig’ grafted on to different rootstocks, were grown in soil infested with different numbers of Heterodera rostochiensis (Mainly pathotype A). Three rootstocks (RS 4 , RSKN, ISKVF) tolerated damage from nematode populations of up to 125 eggs/g soil, but nematodes increased up to x45 on them. Two nematode‐resistant F 1 hybrid rootstocks, B66 33 (ex Lycopersicon pimpinellifolium B6 173 ) and B6 015 (ex L. hirsutum var. glabratum B6 013 ), tolerated up to 125 eggs/g soil; nematode populations declined as much as 80% under B66 33 , and increased little under B6 015 . On the self‐rooted ‘Ailsa Craig’ and ‘Kingley Cross' the numbers of nematodes increased markedly (maximum increase x40), and greatly affected growth and yield so that initial populations greater than 62 eggs/g soil caused crop failure.