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The Effect of Potassium On the Rate of Development of the Root-Knot Nematodes Meloidogyne Incognita, M. Javanica and M. Hapla

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For more content, see Nematology.

Studies were made on the relationship between potassium nutrition of cucumber, Cucumis sativus, variety Burpee hybrid, and the development of the root-knot nematode Meloidogyne incognita (Kofoid & White), M. javanica (Treub), and M. hapla, Chitwood, in roots of this host plant. The rate of development of M. incognita was retarded at low levels of potassium and accelerated at high levels. Final populations of the nematode were increased significantly when excess potassium was available to the host plant. M. javanica and M. hapla were not influenced by potassium.

Affiliations: 1: Department of Botany, Ontario Agricultural College, Guelph, Ontario, and Research Station, Canada; 2: Department of Agriculture, Harrow, Ontario


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