Efficiency of Calcium Silicate and Carbonate in Soybean Disease Control

Silicon (Si) affects the susceptibility of plants to fungal attack. In plants with low Si accumulation, disease-control mechanisms involve the accumulation of phenolic compounds and Si. This study compared the effects of calcium silicate and carbonate doses on the control of soybean (Glycine max) di...

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Bibliographic Details
Published in:Journal of plant nutrition 2006-11, Vol.29 (11), p.2049-2061
Main Authors: Nolla, A, Korndorfer, G.H, Coelho, L
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Anura
Biological and medical sciences
calcium carbonate
calcium silicate
Cercospora
Control
defense to biotic stress
disease control
Economic plant physiology
fertilization
Fundamental and applied biological sciences. Psychology
fungal diseases of plants
Fungal plant pathogens
Glycine max
Mineral nutrition
Nutrition. Photosynthesis. Respiration. Metabolism
Peronospora
Phakopsora pachyrhizi
phytoalexins
Phytopathology. Animal pests. Plant and forest protection
plant nutrition
resistance mechanism
silicon
slag
soybeans
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Summary:Silicon (Si) affects the susceptibility of plants to fungal attack. In plants with low Si accumulation, disease-control mechanisms involve the accumulation of phenolic compounds and Si. This study compared the effects of calcium silicate and carbonate doses on the control of soybean (Glycine max) diseases. A sandy soil was collected from Santa Vitoria, Minas Gerais state, Brazil, of which 200 kg was placed in plastic drums in a protected, uncovered area. Calcium carbonate or silicate was applied superficially in amounts equivalent to 0, 1500, 3000, 6000, or 12,000 kg ha-1, and soybean was cultivated for 120 d. Leaf Si concentration and incidence of Cercospora sojina (Frog's eye spot), Peronospora manshurica (downy mildew), and Phakopsora pachyrhizi (Asian rust) were evaluated. Calcium carbonate did not reduce disease incidence; however, calcium silicate was effective in the reduction of downy mildew at 47 and 66 d after soybean seeding, and of frog's eye spot incidence at all dates evaluated. Asian rust was observed only at 79 d after seeding and calcium silicate was not effective in its reduction.
ISSN:0190-4167
1532-4087
DOI:10.1080/01904160600932658