Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth.:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2000
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 121 S. graph. Darst. |
Internformat
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Datensatz im Suchindex
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Titel: Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and t
Autor: Rambakudzibga, Albert Mufaro
Jahr: 2000
CONTENTS
1 Introduction Pa
1.1 Information about Zimbabwe 1
1.1.1 Geographical location 1
1.1.2 Climate 1
1.1.3 Population 1
1.1.4 Agriculture 3
1.2 Cowpea and its role in the cropping systems 3
1.3 Alectra vogelii as a constraint to cowpea productivity 5
1.4 Objectives of the study 6
1.5 Outline of this thesis 7
2 Literature review
2.1 The angiospermous root-parasitic weed Alectra vogelii 8
2.1.1 Distribution and morphology 8
2.1.2 Germination and early development 10
2.1.3 Mechanisms of host defence 13
2.1.4 Control of Alectra vogelii 14
2.1.4.1 Manual 15
2.1.4.2 Trap and catch crops 15
2.1.4.3 Intercropping 17
2.1.4.4 Soil fertility amendments 17
2.1.4.5 Host plant resistance 19
2.1.4.6 Planting date 19
2.1.4.7 Herbicides 20
2.1.4.8 Biological control 21
2.2 The physiology of cowpea 22
2.2.1 The growth and development of cowpea 22
2.2.2 Effects of temperature on cowpea growth and
development 24
2.2.3 Effects of radiation on the growth and development
of cowpea 26
2.2.4 Effects of soil moisture on cowpea growth
and development 27
2.3 Host-parasite interaction with an emphasis on the
cowpea-A/ecfra vogelii association 28
2.3.1 Effects of plant parasites on host growth
and development 28
2.3.2 Mechanisms of host dry matter reduction due to
parasite infection 29
3 Materials and Methods
3.1 Greenhouse Experiment 33
3.2 Field Experiment I 34
3.2.1 Location and environmental characteristics 34
3.2.2 Cultural details 35
3.2.3 Experimental design 36
3.2.4 Sequential harvest data 37
3.2.5 Alectra vogelii data 37
3.2.6 Cowpea root-length density determination 38
3.2.7 Leaf area index data 38
3.2.8 Weather data 39
3.2.9 Soil moisture data 40
3.3 Field Experiment II 41
3.3.1 Location, cultural details and experimental design 41
3.3.2 Sequential harvest data 41
3.4 Statistical analysis 42
4 Results
4.1 Greenhouse Experiment 43
4.1.1 Alectra vogelii attachments onto host roots and dry matter
accumulation 43
4.1.2 Cowpea development and dry matter production 44
4.1.3 Dry matter partitioning in the host-parasite system 46
4.2 Field Experiment I 51
4.2.1 Climatic conditions 51
4.2.2 Developmental characteristics and grain yield of two
cowpea varieties, IT82D889 and 243/89, in the 1998/98
growing season 53
4.2.3 Canopy development, light interception and utilisation,
and grain yield of cowpea variety IT82D889 in 1997/98
and 1998/99 growing seasons 55
4.2.4 Alectra vogelii attachments and shoot counts 60
4.2.5 Cov/pea-Alectra vogelii interactions 62
4.2.5.1 Cowpea development, light interception and
utilisation, and dry matter accumulation 62
4.2.5.2 Soil moisture relations 65
4.2.5.3 Cowpea seed and Alectra vogelii dry matter relations 65
4.3 Field Experiment II 68
4.3.1 Effects of Alectra vogelii on cowpea pods maturation 68
4.3.1.1 Pod addition 68
4.3.1.2 Effects of Alectra vogelii infection on dry matter
partitioning to cowpea pods 68
5 Discussion 72
5.1 Development of Alectra vogelii 73
5.2 Development, dry matter production and yield formation
of cowpea 75
5.3 Light interception and utilisation, and dry matter
production of cowpea 76
5.4 Effects of Alectra vogelii on growth and development
of cowpea 78
5.5 Effects of Alectra vogelii on cowpea pods
dry matter accumulation 85
6 Conclusions 87
7 Summary 88
8 Zusammenfassung 92
9 References 96 |
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| spelling | Rambakudzibga, Albert Mufaro 1962- Verfasser (DE-588)122231147 aut Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. eingereicht von Albert Mufaro Rambakudzibga 2000 121 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Gießen, Univ., Diss., 2000 Parasit (DE-588)4044635-9 gnd rswk-swf Augenbohne (DE-588)4209340-5 gnd rswk-swf Alectra vogelii (DE-588)4520174-2 gnd rswk-swf Wirt (DE-588)4132477-8 gnd rswk-swf Simbabwe (DE-588)4049850-5 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Simbabwe (DE-588)4049850-5 g Augenbohne (DE-588)4209340-5 s Alectra vogelii (DE-588)4520174-2 s Wirt (DE-588)4132477-8 s Parasit (DE-588)4044635-9 s DE-188 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=021947542&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Rambakudzibga, Albert Mufaro 1962- Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. Parasit (DE-588)4044635-9 gnd Augenbohne (DE-588)4209340-5 gnd Alectra vogelii (DE-588)4520174-2 gnd Wirt (DE-588)4132477-8 gnd |
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| title | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. |
| title_auth | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. |
| title_exact_search | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. |
| title_full | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. eingereicht von Albert Mufaro Rambakudzibga |
| title_fullStr | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. eingereicht von Albert Mufaro Rambakudzibga |
| title_full_unstemmed | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. eingereicht von Albert Mufaro Rambakudzibga |
| title_short | Aspects of the host parasite association between the grain legume Vigna unguiculata L. (Walp.) and the parasitic angiosperm Alectra vogelii Benth. |
| title_sort | aspects of the host parasite association between the grain legume vigna unguiculata l walp and the parasitic angiosperm alectra vogelii benth |
| topic | Parasit (DE-588)4044635-9 gnd Augenbohne (DE-588)4209340-5 gnd Alectra vogelii (DE-588)4520174-2 gnd Wirt (DE-588)4132477-8 gnd |
| topic_facet | Parasit Augenbohne Alectra vogelii Wirt Simbabwe Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=021947542&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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