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Preliminary Studies on Lettuce Big‐vein Control
Author(s) -
Garrett R. G.,
Tomlinson J. A.
Publication year - 1967
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1967.tb00373.x
Subject(s) - biology , cultivar , inoculation , zoospore , horticulture , botany , agronomy , spore
SUMMARY In studies on the control of lettuce big‐vein disease it was found that delay in symptom expression occurred when seedlings were planted into contaminated soil while enclosed in 1 1 / 4 ‐in. sq. peat pots containing autoclaved soil. The consequent reduction in the number of affected plants at harvest was sufficient to warrant the use of the method in commercial practice. The lettuce cultivar ‘Merit’, previously reported to show some tolerance to big‐vein, became as severely affected as control cultivars when inoculated with viruliferous zoospores of a British isolate of Olpidium . Plants of ‘Lobjoit's Green’ cos lettuce showed marked differences in the time taken for symptom expression but tests of their progenies showed that these differences were caused by experimental variation and were not heritable.