Pathogenicity of Meloidogyne hapla to
Lettuce as Affected by Inoculum Level,
Plant Age at Inoculation and Temperature |
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Authors: | T. K. Wong W. F. Mai |
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Abstract: | Pathogenicity of Meloidogyne hapla to lettuce was influenced by inoculum level, age of plant at inoculation and temperature. Top weight of ''Minetto'' lettuce was reduced 32% when 2-week-old lettuce plants were each inoculated with five egg masses. Higher inoculum levels did not further decrease top weight significantly. Inoculation at seeding reduced top growth more than inoculation of 1-, 2- or 3-week-old seedlings. M. hapla reduced growth more at the intermediate (21.1 C night and 26.7 C day), than at the low (15.5 C night and 21.1 C day) or high (26.7 C night and 32.2 C day), temperature regimes. |
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Keywords: | Root-knot nematode northern root-knot nematode Lactuca sativa |
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