Abstract
AMONG nematodes separated from soil about the roots of Grenache vines in February 1957 were females of Pratylenchus which carried eggs at their tails, outside the body but within a partly cast cuticle. Six specimens were recovered from a few pounds of soil. The life-cycle of a typical Pratylenchus 1 includes four moults from egg to adult, the first moult occurring in the egg, where the second-stage larva may be distinguished by the appearance of a well-defined buccal spear. In each of these specimens the egg contained a clearly differentiated second-stage larva. The cuticle of the nematode was detached at the head region and at the rear of the body from a point anterior to the vulva. Many normal specimens of Pratylenthus were also present, and one apparently larval female carried an egg with a second-stage larva in the oviduct.
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References
Jensen, H. J., Ph.D. dissertation, University of California Library (1950).
Sher, S. A., and Allen, M. W., Univ. Calif. Pub. Zool., 57, 441 (1953).
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SAUER, M. Development of Eggs before the Final Moult in Pratylenchus . Nature 181, 129 (1958). https://doi.org/10.1038/181129a0
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DOI: https://doi.org/10.1038/181129a0
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