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Emergence of Kenaf Seedlings as Affected by Seed Fungicides

Author:
White, G. A., Adamson, W. C., Whiteley, E. L., Massey, J. H.
Source:
Agronomy journal 1971 v.63 no.3 pp. 484-486
ISSN:
0002-1962
Subject:
botany, Plant Science and Plant Products
Abstract:
Effects of four chemical seed treatments on seedling emergence of three seed lots of kenaf (Hibiscus cannabinus L.) were studied at several locations in 1969-70. No beneficial effects of chemical seed treatments were found from a late planting at Experiment, Ga. At Savannah, Ga., in 1969, significantly more seedlings emerged from an early April planting of seed treated with tetrachloroisophthalonitrile (Daconil 2787)³ — sodium p-(dimethylamino) benzenediazosulfonate (Dexon)³ + 1,4-dichloro- 2,5-dimethoxybenzene (chloroneb) and bis(dimethylthiocarbamoyl) disulfide (thiram) than from the check. for combined 1969-70 data for ‘Everglades 71’, only N- (ethylmercury)-p-toluenesulfonanilide (Ceresan M)² + chloroneb was superior to the check. At Glenn Dale, Md., chemical seed treatment was beneficial in both 1969 plantings and in an early 1970 planting. In these tests Ceresan M + chloroneb was inferior to the other chemical treatments. Equally good results were obtained from thiram, thiram + chloroneb, and Daconil 2787-Dexon + chloroneb. Thiram gave the best results in a 1969 test at College Station, Texas. Seedling emergence from ‘Everglades 41b’ seeds, that had an initial laboratory germinatiou of 83%, was enhanced by chemical treatment. In field tests at Savannah and Glenn Dale, only 65% emergence was obtained for the untreated check compared to an average of 78% for the four chemical treatments. In general, differences among chemical treatments were small and all of them except Ceresan M could be used pending registration.
Agid:
2523517