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Critical issues in plant health: 50 years of research in African agriculture

Critical issues in plant health: 50 years of research in African agriculture

Dr Peter Neuenschwander | Dr Manuele Tamò | Dr Kenton Dashiell | Dr Peter Neuenschwander | Dr Manuele Tamò | Dr P. Lava Kumar | Dr James P. Legg | Dr Maria Adoyele | Dr George Mahuku | Dr Alejandro Ortega-Beltran | Dr Ranajit Bandyopadhayay | Dr Georg Goergen | Dr Danny Coyne | Dr Everlyne Wosula | Dr Livia Stavolone | Dr Eugene Terry | Dr Nilsa Bosque-Pérez | Dr Muaka Toko | Dr J. Steve Yaninek | Dr André Fanou | Dr Victor Zinsou | Dr Kerstin D. Wydra | Dr Rachid Hanna | Dr Appolin Fotso | Dr Ouorou Douro-Kpindou | Dr Kitty F. Cardwell | Dr Fritz Schulthess | Dr William Meikle | Dr Mamoudou Sétamou | Dr Peter J. Cotty | Dr Babatima Djana Mignouna | Dr Ranjana Bhattacharjee | Dr David De Koeyer | Dr Stefan Hauser | Dr Clifford Gold | Dr Cornelia Pasberg-Gauhl | Dr Friedhelm Gauhl | Dr Juliet Akello | Dr Kim Jacobsen | Dr Lindsey Norgrove | Dr Manoj Kaushal | Dr Valentine Nakato | Dr Leena Tripathi | Dr Jaindra Tripathi | Dr Léonard Afouda | Dr Harry Bottenberg | Dr Laura Cortada-Gonzales | Harun M. Murithi | Prof. Barry Pittendrigh | Dr Rachidatou Sikirou | Dr Abou Togola | Dr Ignace Godonou | Dr May-Guri Sӕthre | Dr Ghislain Tepa-Yotto | Dr Désiré Gnanvossou | Dr Koffi Negloh | Dr Cyriaque Agboton | Dr Frederick Schreurs | Dr Christiaan Kooyman | Dr Adebowale Akande | Dr Matieyedou Konlambigue | Dr Niels Van den Bosch | Dr David Chikoye | Dr Friday Ekeleme | Dr Abebe Menkir | Dr Alpha Y. Kamara | Dr Obinna Ajuonu | Hakeem A. Ajeigbe | Dr Michael Abberton | Dr Sounkoura Adetonah | Dr Brice Gbaguidi | Dr Marc Schut

(2019)

Abstract

Plant health covers topics such as the safe handling and movement of germplasm and seed, as well as the range of biotic threats faced by crops and the ways they can be managed to optimise yields and ensure safety and quality in crop production. These threats include viral, bacterial and fungal diseases as well as the impact of insect pests and weeds. This collection summarises 50 years of research on plant health by the International Institute of Tropical Agriculture (IITA) to improve the health of crops in Africa.
The first part of the book reviews general issues such as pest and disease surveillance and the range of viruses affecting key African crops. Part 2 summarises key research on improving the health of major crops such as cassava, maize, yams and cocoyams, bananas and plantains, legumes, vegetables and tree fruits. The final part of the book discusses ways of improving integrated pest management of insect pests, diseases and weeds in sub-Saharan Africa.
This unique book brings together some of the world’s leading experts on plant health in sub-Saharan Africa to review progress in dealing with the range of biotic threats faced by African farmers, and will be a standard reference on improving the management of pests and diseases in developing countries.
"With concerns about climate change, loss of biodiversity and the need to feed an ever-growing human population, the book provides a valuable reference on the need to develop IPM giving greater emphasis to the environment. This is necessary with the future of farming changing with new technology, including precision agriculture, digitalisation, robotics and new genetic engineering technology."
International Pest Control – review by Emeritus Professor Graham Matthews, Imperial College London, UK
"With concerns about climate change, loss of biodiversity and the need to feed an ever-growing human population, the book provides a valuable reference on the need to develop IPM giving greater emphasis to the environment. This is necessary with the future of farming changing with new technology, including precision agriculture, digitalisation, robotics and new genetic engineering technology."
International Pest Control – review by Emeritus Professor Graham Matthews, Imperial College London, UK
“This book, a must read for international agricultural scientists and pest management specialists, describes in meticulous detail how a group of eminent scientists have dedicated their lives to produce research that has led to stunning breakthroughs in the development of pest management strategies designed to solve the problems of African food insecurity, hunger and poverty.” Professor E. A. "Short" Heinrichs, Secretary General - International Association for the Plant Protection Sciences

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Table of Contents

Section Title Page Action Price
Critical issues in plant health:50 years of research in African agriculture i
Contents v
Series list xii
The International Institute of Tropical Agriculture (IITA) xvii
List of major IITA donors xviii
Chapter lead author contact details xix
Foreword xx
Part 1 Managing threats to plant health 1
Chapter 1 Key challenges in plant health in sub-Saharan Africa: stakeholder priorities 3
1 Introduction 3
2 Priorities in plant health: international organisations 4
3 Priorities in plant health: universities 9
4 Priorities in plant health: NARS 13
5 Priorities in plant health: BEAF – GIZ 16
6 Conclusion 17
Chapter 2 Introduction: meeting challenges in plant health in sub-Saharan Africa 19
1 The importance of plant protection in agriculture 19
2 Historical development of plant protection 22
3 History of IITA’s plant protection research and \nimplementation 25
4 Structure of this text 31
5 Where to look for further information 32
6 References 33
Chapter 3 Disease surveillance, diagnostics and germplasm health in crop protection 41
1 Introduction 41
2 Disease surveillance 42
3 Factors for emergence and re-emergence of epidemics in SSA 48
4 Tools for disease diagnostics 51
5 Early warning and response systems 57
6 Germplasm safety and preventing the spread of seed-borne pathogens 59
7 Conclusion and future trends 64
8 References 66
Chapter 4 Conserving and exploiting biodiversity in crop cultivation in sub-Saharan Africa 75
1 Introduction 75
2 Developing the insect collection at IITA 77
3 Specific examples demonstrating the importance of an accurate diagnosis 79
4 Exploiting scientific collections 86
5 New challenges and opportunities 87
6 From using to protecting biodiversity 88
7 Conclusion and future trends 89
8 References 89
Chapter 5 Viruses affecting African crops and their vectors 95
1 Introduction 95
2 Cassava virus diseases 98
3 Maize virus diseases 104
4 Banana and plantain virus diseases 109
5 Yam viruses 111
6 Cowpea viruses 113
7 Soybean viruses 117
8 Virus vectors 118
9 Emerging techniques and future perspectives for plant virus management in Africa 123
10 Future trends and conclusion 124
11 Where to look for further information 125
12 References 126
Part 2 Plant health in practice: managing threats to key African crops 137
Chapter 6 Identifying and managing plant health risks for key African crops: cassava 139
1 Introduction 139
2 The management of insect pests 141
3 Identifying and managing cassava diseases 155
4 Conclusion and future trends 159
5 Where to look for further information 161
6 References 163
Chapter 7 Identifying and managing plant health risks for key African crops: maize 173
1 Introduction 173
2 Exploratory years in maize research 175
3 Diagnostic surveys and in-country plant health analysis 176
4 Downy mildew eradication programme, southern Nigeria 1995 178
5 Biological control of stemborers 182
6 Interactions between Fusarium verticillioides \nand maize pests 185
7 Post-harvest losses 188
8 Larger grain borer and other beetles 190
9 Mycotoxins 193
10 Conclusions and future trends 199
11 References 200
Chapter 8 Identifying and managing plant health risks for key African crops: yam, taro and cocoyam 213
1 Introduction 213
2 Major threats to yam, taro and cocoyam and \nmanagement options 216
3 Status of pest and disease control measures 220
4 Conclusion and future trends 223
5 References 224
Chapter 9 Identifying and managing plant health risks for key African crops: banana and plantain 229
1 Introduction 229
2 Viruses 230
3 Banana Xanthomonas wilt 233
4 Fungal diseases 234
5 Nematodes 238
6 Banana weevil 244
7 Conclusion 249
8 Where to look for further information 250
9 References 251
Chapter 10 Identifying and managing plant health risks for key African crops: legumes 259
1 Introduction 259
2 Cowpea 261
3 Soybean 279
4 Conclusions and future trends 282
5 Where to look for further information 283
6 References 283
Chapter 11 Identifying and managing plant health risks for key African crops: vegetables 295
1 Introduction 295
2 Biotic constraints to vegetable production 296
3 Problems in pesticide use 304
4 Biological alternatives to pesticides for pest control 305
5 Conclusions 309
6 References 310
Chapter 12 Identifying and managing plant health risks for key African crops: fruit and other tree crops 317
1 Introduction 317
2 Mango mealybug 321
3 Fruit flies 323
4 Spiralling whitefly 325
5 Papaya mealybug 326
6 Phytophthora megakarya 329
7 Coconut mite 331
8 Cashew wood borer 332
9 Conclusions 332
10 References 333
Part 3 Integrated pest management: putting it all together and exchange of knowledge with farmers 343
Chapter 13 Commercial products promoting plant health in African agricul 345
1 Introduction 345
2 Green Muscle 346
3 Aflasafe 350
4 Commercialization principles 356
5 Conclusion and future trends 359
6 Where to look for further information 360
7 References 361
Chapter 14 Weeds affecting field crops and \nwater bodies in Africa 365
1 Introduction 365
2 Integrated management of speargrass (Imperata cylindrica) 366
3 Integrated management of Striga hermonthica 373
4 Role and control of Chromolaena odorata \nin the humid tropics 378
5 Weed control in plantain 380
6 Weed control in cassava systems 383
7 Floating aquatic weeds 385
8 Conclusion and future trends 389
9 Where to look for further information 390
10 References 390
Chapter 15 Making integrated pest management (IPM) work in sub-Saharan Africa 397
1 Introduction 397
2 Healthy planting material 399
3 The role of pesticides 399
4 Gender access to IPM 404
5 Improved exchange with farmers 405
6 Improved collaboration 407
7 Future trends and conclusion 407
8 Where to look for further information 408
9 References 409
Part 4 Conclusions and future challenges 413
Chapter 16 Improving plant health in sub-Saharan Africa: conclusions and future challenges 415
1 Introduction 415
2 The views of IITA clients and peers 417
3 Comparing various IITA projects and their impact 419
4 Overall assessment 443
5 IITA’s plans for the future 445
6 Recommendations 448
7 Acknowledgements 449
8 Where to look for further information 449
9 References 450
Index 457