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Chapter Fourteen
Hungry Planet: Stories of Plant Diseases

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 Arable land

 C14.1. Eroded soil.
  C14.2. Weeding rice seedlings by hand (Taiwan). 
Water resources    
C14.3. Trickle irrigation reduces water loss to evaporation (strawberries).  .   C14.4. Boy irrigating rice by hand (Bangladesh).
C14.5. Hand irrigating cabbage (Philippines).  



Air pollution
C14.6. Marginal and interveinal chlorosis and necrosis on grape leaves caused by sulfur dioxide. C14.7. Marginal and interveinal necrosis on grape leaves caused by hydrogen fluoride emitted from an aluminum-processing plant.

C14.8. Forest decline of red spruce. A, Red spruce mortality, Crawford Notch, White Mountain National Forest, New Hampshire. B, Dead red spruce, Santanoni Peak, Adirondack Park, New York.  C14.9. Genetically based variation in sensitivity to ozone in white pine.  

Food crops
C14.10. Yam (Dioscorea species) storage in Nigeria. Note how the yams are spaced for drying and up off the ground. (African yam is a different plant from sweet potato, which originated in the Western Hemisphere.)

C14.11. Quinoa (Chenopodium quinoa), a grain crop in Central and South America.

C14.12. Amaranthus species produce a high-protein seed and grow well in poor soils with little water. C14.13. Taro (Colocasia esculenta), also called dasheen (large leaves near the ground), growing at the edge of a cacao plantation.

Climate change and energy

C14.14. Woman gathering firewood in Taiwan.

C14.15.  Black pod rot of cacao (Phytophthora species), showing healthy and diseased pods on the same tree. C14.16. Fruiting bodies of the witches' broom fungus (Crinipellis perniciosa) on a cacao branch and fruit.


C14.17. Symptoms of cassava mosaic disease.
C14.18. Cassava roots infected by Cassava brown streak virus.
C14.19. Polyculture: mixed cropping (seven different crops, including banana, cassava, maize, peanut, squash, and others). C14.20. Diversity of beans grown by small farmers in Latin America.