Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 13:507-510 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Succinic Acid 2,2-Dimethylhydrazide on Yield and Morphological Characteristics of Starr Peanuts (Arachis hypogaea L.)1

R. H. Brown, W. J. Ethredge and J. W. King2

Succinic acid 2,2-dimethylhydrazide (SADH) was applied to "Starr" peanuts (Arachis hypogaea L.) at the rate of 1.43 kg/ha in 1968, 1969, and 1970. Data were obtained on pod yield; stem length; peg and pod lengths; pod, stem and leaf weights; and leaflet area. The most consistent effect of SADH was a reduction of plant height. Stem lengths were reduced 30 to 40% by SADH application. Pod length was reduced by 6 to 10% in 1969 and 4% in 1970 when plants were treated with SADH. Peg length in 1970 was 2.7 cm on SADH-treated plants compared to 3.4 cm for controls.

Pod yields were increased in 1968, but not in 1969 or 1970. The increase in yield in 1968 was similar for irrigated and nonirrigated peanuts. Stem weight per plant was decreased by SADH in 1970 but not in 1969, and the pod-vegetative ratio was increased in 1969 and 1970. Specific leaf area and area of leaflets were reduced in some cases by SADH applications. Dry weight per leaflet was not affected. Reduction of top growth may be beneficial because ground machinery can be used later than usual in the season to apply insecticides and fungicides without damage to the peanut plants.

Key Words: Plant height • Pod-vegetative ratio • Pod length • Peg length

1 Contribution of the University of Georgia Agricultural Experiment Station, College Station, Athens and Southwest Georgia Branch Station, Plains. Research supported in part by Uniroyal Inc., manufacturer of SADH.

2 Professor, Assistant Professor, and Graduate Research Assistant, respectively.

Received for publication August 25, 1973.




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Copyright © 1973 by the Crop Science Society of America.