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Using color ir aerial photography to study cotton fields infested with meloidogyne incognita


, : Using color ir aerial photography to study cotton fields infested with meloidogyne incognita. Plant Disease 66(2): 105-108

Color IR photographs of cotton fields during 3 successive years of growth were used as a technique in a survey to detect infested areas. On the photographs, nematode infestation appeared as irregular areas characterized by exposed soil and dense weed vegetation. The center of a highly nematode-infested area was characterized by lack of vegetation or by thin rows of cotton, which could also be seen along the margins of the area. Photographs taken at the end of the cotton-growing season gave a better image of the infested area than photographs taken earlier in the season. The rate of nematode spread according to the photographs averaged 25-50%/yr.

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