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Triadimenol drenches and residues in tobacco seedbeds improve growth and disease control in transplants
Author(s) -
COLE J. S.,
ZVENYIKA Z.
Publication year - 1987
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1987.tb02249.x
Subject(s) - transplanting , rhizoctonia solani , sowing , biology , seedling , horticulture , nicotiana tabacum , agronomy , biochemistry , gene
Triadimenol residues in sandy and clay soils, following applications of up to 1 g/m 2 in previous seasons to tobacco seedlings 2 days before they were transplanted, had little effect on seedling emergence and growth. Residues were beneficial to transplants; they improved growth and controlled stem and root infection caused by Rhizoctonia solani and Fusarium solani. During the first 4 weeks after transplanting, stem infection was negatively correlated with log e of the pre‐sowing rate of triadimenol and with log e of the soil concentration in seedbeds at pulling. Plant growth increased linearly according to the equation l/Y=a+b/(x‐c), where Y = plant dry mass (g/plant), .x = triadimenol pre‐sowing (mg/m 2 ) and c= ‐ 1 1, determined iteratively, r 2 = 0‐94; P < 0.001. Triadimenol applications to bare soil increased the soil concentration by 1 μ/g per 50 mg/m 2 applied.