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  1. Vol. 13 No. 5, p. 507-510
     
    Received: Aug 25, 1973
    Published: Sept, 1973


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doi:10.2135/cropsci1973.0011183X001300050005x

Influence of Succinic Acid 2,2-Dimethylhydrazide on Yield and Morphological Characteristics of Starr Peanuts (Arachis hypogaea L.)1

  1. R. H. Brown,
  2. W. J. Ethredge and
  3. J. W. King2

Abstract

Abstract

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.

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