Plant Virus and Viroid Diseases in the Tropics

Chapter I - Ecology and Epidemiology of Virus and Viroid Diseases of Tropical Crops1.1 Introduction1.2 Epidemiological concepts1.3 Conditions favorable for epiphytotics1.4 Cropping systems and practices1.5 Host properties1.6 Pathogen properties1.7 ICTV recognized viruses1.8 Pathways of virus spread1.9 Dispersal and Migration of Insect vectors1.10 Factors of Vector transmission1.11 Virus Survival and spread1.12 Disease forecasting1.13 The cyclical nature of plant disease1.14 Disease progress curve1.15 Growth models for disease progress1.16 Spatial dynamics and metapopulations1.17 Disease gradients and progress curves1.18 Mathematical modeling techniques 1.19 Virus-vector population model1.20 Systems Analysis and Simulation Models1.21 ConclusionsChapter II - Management of Virus and Viroid Diseases of Crops in the Tropics2.1 Introduction2.2 Need for diagnosis of plant virus and viroid diseases2.3 Approaches for virus and viroid diseases management2.4 Use of virus / viroid-free vegetative propagules and true seed2.5 Certification schemes of crops having virus transmission through true seed2.6 Virus and viroid disease transmission through Vegetative propagules2.7 Success stories of production of virus-free plant propagules2.8 Certification schemes of economically important crops2.9 Production and use of virus-free transplants 2.10 Need for managing the virus diseases2.11 Avoidance of sources of infection / inoculums2.12 Variation of the crop cultural practices2.13 Cross-protection in crop plants2.14 Vector control2.15 Role of botanicals in plant virus management2.16 Role of oils in arthropod vector control2.17 Biological control of plant virus vectors2.18 Avoidance of vectors2.19 Role of repelling and attracting surfaces in vector control2.20 Resistance2.21 Transgenic approach2.22 Bio-safety regulations against GM Crops2.23 Induction of systemic resistance2.24 Quarantines2.25 Pest risk analysis (PRA)2.26 World Trade Organization regime and its implications2.27 Plant