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Screening for resistance to Meloidogyne incognita (Kofoid and White) Chitwood in Aeschynomene and Desmodium spp. and herbicide effects on Aeschynomene americana L.Pasley, Sherman F. January 1981 (has links)
Thesis (Ph. D.)--University of Florida. 1981. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 68-71).
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INTERACTION BETWEEN MELOIDOGYNE INCOGNITA AND RHIZOCTONIA SOLANI IN SEEDLING DISEASE OF COTTONCarter, William Whitney, 1941- January 1973 (has links)
No description available.
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Intercropping with resistant cultivars reduces early blight and root knot disease on susceptible cultivars of tomato (Lycopersicon esculentum)Smith, Linley Joy. January 2002 (has links)
Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains viii, 77 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 71-77).
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FACTORS INFLUENCING THE RESISTANCE OF COTTON TO THE ROOT-KNOT NEMATODE MELOIDOGYNE INCOGNITAEllis, Kenneth Carl, 1943- January 1970 (has links)
No description available.
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EVALUATION AND GENETIC ANALYSIS OF TWO SOYBEAN [Glycine max (L.) Merr.] RECOMBINANT INBRED LINE POPULATIONS SEGREGATING FOR RESISTANCE TO ROOT KNOT NEMATODE (Meloidogyne incognita)Wright, Drew Welsey 01 December 2012 (has links)
One of the most economically important pathogens of US soybeans is the Southern Root Knot Nematode [(Meloidogyne incognita) (Kofoid and White) Chitwood] (Mi). Evaluation and identification of resistance is highly important to the plant breeding program at SIUC. The main objective of this study was to screen within the greenhouse two F5:7 recombinant inbred line (RIL) (n=96) from crosses between LS90-1920 or LS97-1610 (resistant parents) with `Spencer' (susceptible parent) to identify sources of resistance for Mi. Additionally, the RILs were evaluated in two locations in southern Illinois (Harrisburg and Dowell) in 2011 for several agronomic characteristics including yield performance. The phenotypic data collected from field and greenhouse experiments was used to select for superior lines within the two populations. The screening data was also used to identify single nucleotide polymorphism (SNP) markers associated with Mi resistance. Initial screening of the 5,361 SNP markers indicated four SNP markers (ss247062763, ss247064854, ss247077423 and ss247067293) highly associated with resistance to Mi. The results will help accelerating selection practices, and have provided high yielding resistant lines for the creation of resistant commercial varieties.
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IDENTIFICATION AND METABOLISM OF INDOLES IN MELOIDOGYNE INCOGNITA AND IN COTTON RESISTANT AND SUSCEPTIBLE TO MELOIDOGYNE INCOGNITALewis, Stephen Albert, 1942- January 1973 (has links)
No description available.
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The influence of Rhizoctonia solani Kuhn and of Meloidogyne incognita acrita Chitwood on the infection of cotton plants by Verticillium albo-atrum Reinke and BerthKhoury, Farid Yousef, 1937- January 1970 (has links)
No description available.
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Host specific and morphological variation of Meloidogyne incognita on Arizona cottonAkhdhar, Fawwaz Mohammed Hassan January 1979 (has links)
No description available.
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Biochemical characterization of Medicago truncatula root knots induced by Meloidogyne incognitaGuhl, Katherine Elizabeth. January 2006 (has links)
Thesis (M.S.)--University of Delaware, 2006. / Principal faculty advisor: Darla J. Sherrier, Dept. of Plant and Soil Science. Includes bibliographical references.
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Host-status and host-sensitivity of sweet potato cultivar 'blesbok' to meloidogyne javanica and related management strategies of meloidogyne inconitaMakhado, Ndemedzo Vincent January 2020 (has links)
Thesis (M.A. Agriculture. (Plant Production)) -- University of Limpopo, 2021 / Root-knot (Meloidogyne species) nematodes are host to most plant species, with the
success of most crops being dependent upon proper nematode management tactics.
Sweet potato (Ipomoea batatas L.) is highly susceptible to root-knot nematodes, with
physical damage being visible on roots. The withdrawal of highly effective fumigant
synthetic nematicides from the agrochemical markets resulted in a need to investigate
alternative strategies for managing high nematode population densities, with the use
of nematode resistance being the most preferred strategy. The objectives of this study
were (1) to establish whether sweet potato cv. 'Blesbok' would be resistant to M.
javanica under greenhouse conditions, (2) to investigate whether cucurbitacin containing phytonematicides would be comparable to Velum synthetic nematicide in
suppressing Meloidogyne species. For Objective 1, treatments comprised 0, 5, 25,
125, 625, 3125 and 15625 eggs and second-stage juveniles (J2), had six replications
and validated in time. Uniform sweet potato cuttings were transplanted in 20-cm diameter plastic pots, filled with steam pasteurised (300°C for 1 hour) loam soil. At 56
days after inoculation, plant growth, plant nutrient and nematode variables were
assessed using analysis of variance and subjected to lines of the best fit. Treatments
had significant (P ≤ 0.05) effects on eggs and highly significant (P ≤ 0.01) effects on
J2, final nematode population densities (Pf) and the reproductive factor (RF),
contributing 39, 45, 42 and 92% in total treatment variation (TTV) of the respective
variables. Treatments did not have significant effects on plant variables. Calcium, K,
Mg and Fe versus M. javanica levels each exhibited negative quadratic relations, with
the models being explained by associations from 59 to 96%. In contrast, Zn versus M. javanica levels exhibited positive quadratic relation, with the model being explained by
80 and 98% association and optimised at 125 M. javanica units. For Objective 2, four
treatments, namely, untreated control, Nemarioc-AL phytonematicide, Nemafric-BL
phytonematicide and Velum had 10 replications and also validated in time. The
plantlets with well-developed root system were transplanted under field conditions.
Data for Object 2 did not comply with the requirements for ANOVA and were therefore
subjected to Principal Component Analysis (PCA). Nemafric-BL phytonematicide
treatment in both experiments reduced eggs, J2 in roots and J2 in soil and RP of
Meloidogyne species, with the results being comparable to those of Velum synthetic
nematicide. Nemarioc-AL phytonematicide reduced J2 in roots and in soil of
Meloidogyne species, without affecting eggs in roots and RP. Nemafric-BL
phytonematicide and Velum each increased plant growth variables in Experiment 1
and Experiment 2, whereas Nemarioc-AL phytonematicide did not have significant
effects on plant growth variables. Velum chemical nematicide stimulated the
accumulation of most essential nutrient elements in leaf tissues of the test cultivar,
followed by Nemafric-BL phytonematicide, whereas Nemarioc-AL phytonematicide
had no significant effects on the accumulation of essential nutrient elements. The
study had two major outcomes, namely, (1) that the efficacy of Nemafric-BL
phytonematicide was comparable to that of Velum chemical nematicide in suppression
of population densities of Meloidogyne species in cv. ′Blesbok′ under field conditions
and (2) that cv. ′Blesbok′ was tolerant to M. javanica and therefore, it was not
necessary to investigate the mechanisms of nematode resistance. / Agricultural Research Council (ARC) and National Research Foundation (NRF)
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