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Influence of the Environment On Development and Sex Differentiation of Root-Knot Nematodes

Influence of the Environment On Development and Sex Differentiation of Root-Knot Nematodes INFLUENCE OF THE ENVIRONMENT ON DEVELOPMENT AND SEX DIFFERENTIATION OF ROOT-KNOT NEMATODES II. EFFECT OF HOST NUTRITION 1) BY R. G. DAVIDE and A. C. TRIANTAPHYLLOU Department of Plant Pathology, University of the Philippines, College of Agriculture, Laguna, Philippines and Department of Genetics, North Carolina State University at Raleigh, North Carolina, U.S.A. The rate of development of Meloidogyne incognita was retarded in tomato plants subjected to deficiency treatments of -N, -P, -K, -N-P, -N-K, -P-K, and -N-P-K compared to plants receiving complete (NPK) nutrient. The percent of males was higher in all deficiency treatments but the differences were not very striking since male percentage was relatively low (below 10) in all cases. In most deficiency treatments, roots of infected plants showed higher concentrations of N, Ca and Mg than roots of noninfected plants of the same treatments. Also, with some exceptions, P concentration was higher and K concentration was lower in nematode infected plants. Several reports indicate that the rate of development and perhaps the sex ratio of various root-knot nematode species are influenced by the nutritional condition of the host plant. Tyler (1933) correlated low rate of development as well as increase in percentage of males of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Influence of the Environment On Development and Sex Differentiation of Root-Knot Nematodes

Davide, R.G.; Triantaphyllou, A.C.
Nematologica , Volume 13 (1): 7 – Jan 1, 1967
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529267X00995
Publisher site
See Article on Publisher Site

Abstract

INFLUENCE OF THE ENVIRONMENT ON DEVELOPMENT AND SEX DIFFERENTIATION OF ROOT-KNOT NEMATODES II. EFFECT OF HOST NUTRITION 1) BY R. G. DAVIDE and A. C. TRIANTAPHYLLOU Department of Plant Pathology, University of the Philippines, College of Agriculture, Laguna, Philippines and Department of Genetics, North Carolina State University at Raleigh, North Carolina, U.S.A. The rate of development of Meloidogyne incognita was retarded in tomato plants subjected to deficiency treatments of -N, -P, -K, -N-P, -N-K, -P-K, and -N-P-K compared to plants receiving complete (NPK) nutrient. The percent of males was higher in all deficiency treatments but the differences were not very striking since male percentage was relatively low (below 10) in all cases. In most deficiency treatments, roots of infected plants showed higher concentrations of N, Ca and Mg than roots of noninfected plants of the same treatments. Also, with some exceptions, P concentration was higher and K concentration was lower in nematode infected plants. Several reports indicate that the rate of development and perhaps the sex ratio of various root-knot nematode species are influenced by the nutritional condition of the host plant. Tyler (1933) correlated low rate of development as well as increase in percentage of males of

Journal

Nematologica – Brill

Published: Jan 1, 1967

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