Effect of soil solarization with supplementary materials on the occurrence of lettuce [Lactuca sativa] big-vein disease in a commercial field
2008
Iwamoto, Y.(Hyogo-ken. Technology Center for Agriculture, Forestry and Fisheries, Kasai (Japan). Agricultural Inst.) | Aino, M.
Big-vein disease occurs on lettuce worldwide in temperate regions. The causal agent is transmitted from diseased to healthy plants by zoospores of the lettuce root-infecting fungus Olpidium brassicae. To enhance the suppressive effect of soil solarization on the occurrence of lettuce big-vein disease, various supplementary materials were applied to soils before solarization. All the supplementary materials tested, i.e., methionine (40 kg/10a), urea polymer (200 kg/10a), and calcium cyanamide (100 kg/10a), enhanced the suppressive effect of solarization, especially, calcium cyanamide showed the highest prevention value.
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