Plant Virus and Viroid Diseases in the Tropics

<p>Chapter I - Ecology and Epidemiology of Virus and Viroid Diseases of Tropical Crops.- 1.1 Introduction.- 1.2 Epidemiological concepts.- 1.3 Conditions favorable for epiphytotics-. 1.4 Cropping systems and practices.- 1.5 Host properties.- 1.6 Pathogen properties.- 1.7 ICTV recognized viruses.- 1.8 Pathways of virus spread.- 1.9 Dispersal and Migration of Insect vectors.- 1.10 Factors of Vector transmission.- 1.11 Virus Survival and spread.- 1.12 Disease forecasting.- 1.13 The cyclical nature of plant disease.- 1.14 Disease progress curve.- 1.15 Growth models for disease progress.- 1.16 Spatial dynamics and metapopulations.- 1.17 Disease gradients and progress curves.- 1.18 Mathematical modeling techniques .- 1.19 Virus-vector population model.- 1.20 Systems Analysis and Simulation Models.- 1.21 Conclusions.- Chapter II - Management of Virus and Viroid Diseases of Crops in the Tropics.- 2.1 Introduction.- 2.2 Need for diagnosis of plant virus and viroid diseases.- 2.3 Approaches forvirus and viroid diseases management.- 2.4 Use of virus / viroid-free vegetative propagules and true seed.- 2.5 Certification schemes of crops having virus transmission through true seed.- 2.6 Virus and viroid disease transmission through Vegetative propagules.- 2.7 Success stories of production of virus-free plant propagules.- 2.8 Certification schemes of economically important crops.- 2.9 Production and use of virus-free transplants .- 2.10 Need for managing the virus diseases.- 2.11 Avoidance of sources of infection / inoculums.- 2.12 Variation of the crop cultural practices.- 2.13 Cross-protection in crop plants.- 2.14 Vector control.- 2.15 Role of botanicals in plant virus management.- 2.16 Role of oils in arthropod vector control.- 2.17 Biological control of plant virus vectors.- 2.18 Avoidance of vectors.- 2.19 Role of repelling and attracting surfaces in vector control.- 2.20 Resistance.- 2.21 Transgenic approach.- 2.22 Bio-safety regulations against GM Crops.- 2.23 Induction of systemic resistance.- 2.24 Quarantines.- 2.25 Pest risk analysis (PRA).- 2.26 World Trade Organization regime and its implications.- 2.27 Plant biosecurity.- 2.28 Role of IPGRI and NBPGR in germplasm maintenance and exchange .- 2.29 Role of FAO / IBPGR in germplasm exchange.- 2.30 Methods of testing at quarantine stations.- 2.31 Important cases of introduction.- 2.32 Important diseases restricted to some countries .- 2.33 Effective methods of plant importations.- 2.34 General principles for the overall effectiveness of quarantines .- 2.35 Need for networking for the developing countries.- 2.36 Integrated approach.- 2.37 Challenges for the future.</p>