Resumo
In the State of S. Paulo, Brazil, squash plants (Cucurbita spp.) are attacked by the Javanese nematode (Meloidogyne javanica) and by M. incognita acrita. Squash belongs to that group of plants in which the root-knot nematodes break through the root surface, so that the egg-producing females protrude from the root, showing yellowish or brow nish egg masses attached to them. Washed roots show numerous small dark spots, each corresponding to an ootheca, which is adhering to a mature female. A curious abnormal female of M. i. acrita was obtained from a sample of squash roots. This female's body showed two globular parts, separated by a deep constriction. The convoluted ovaries were found to fill both portions of the body.
E. S. A. «Luiz de Queiroz»
SUMMARY
In the State of S. Paulo, Brazil, squash plants (Cucurbita spp.) are attacked by the Javanese nematode (Meloidogyne javanica) and by M. incognita acrita.
Squash belongs to that group of plants in which the root-knot nematodes break through the root surface, so that the egg-producing females protrude from the root, showing yellowish or brow nish egg masses attached to them. Washed roots show numerous small dark spots, each corresponding to an ootheca, which is adhering to a mature female.
A curious abnormal female of M. i. acrita was obtained from a sample of squash roots. This female's body showed two globular parts, separated by a deep constriction. The convoluted ovaries were found to fill both portions of the body.
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LITERATURA CITADA
Recebido para publicação em 27/6/60.
- BESSEY, E. A., 1911 - Root-knot and its control, 89 pp., U. S. Bur. Plant Ind. ed., Beltsvílle, Md.
- BUHRER, E. M., 1938 - Additions to the list of plants attacked by the root-knot nematode (Heterodera marioni). Plant Dis. Reptr. 22(12): 216-234.
- BUHRER, E. M., C. COOPER & G. STEINER, 1933 - A list of plants attacked by the root-knot nematode (Heterodera marioni). Plant Dis. Reptr. 17(7): 64-96:
- CHRISTIE, J. R., 1952- Ectoparasitic nematodes of plants. Phytopathology 42(9): 483-484.
- LORDELLO, L. G. E., 1956 - Parasitismo de Meloidogyne javanica em raízes de aboboreira (Nematoda, Heteroderidae). Rev. Agricultura, Piracicaba, 31(2): 135-138.
- MARTIN, G. C, 1954 - Nematodes. Rhod. Tobacco Jour. 6(5): 109,111 e 113.
- SASSER, J. N., 1954 - Identification and host-parasite relationships of certain root-knot nematodes (Meloidogyne spp.), 31 pp., Un. of Maryland ed., College Park, Md., U.S.A.
- STEINER, G., 1949 - Plant nematodes the grower should know, 47 pp., Dept. Agric. State of Fla. ed., U.S.A.
(Nota n.º 3) Nematódeos da aboboreira
Datas de Publicação
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Publicação nesta coleção
10 Set 2012 -
Data do Fascículo
1960
Histórico
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Recebido
27 Jun 1960