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Effect of Multiple Applications of 2,3,5‐Triiodobenzoic Acid (TIBA) on Yields of Stormproof and Nonstormproof Cotton
Author(s) -
Freytag A. H.,
Coleman E. A.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500040024x
Subject(s) - dwarfing , gossypium hirsutum , yield (engineering) , anthesis , horticulture , agronomy , biology , cultivar , rootstock , materials science , metallurgy
Field grown upland cotton ( Gossypium hisutum L.) usually matures approximately 30 to 40% of the flowers that reach anthesis. Several investigators have shown 2,3,5‐triiodobenzoic acid (TIBA) to be successful in causing the retention of buds, blooms and pods of soybeans ( Glycine max (L.) Merr.) Virtually no results have been reported on the use of TIBA to retain the 30 to 40% flower shed that occurs with cotton. Those who have applied TIBA to cotton have done so with single applications of higher rates than are reported here. This research is concerned with multiple applications of TIBA at lower concentrations. Field studies were conducted over a 2‐year period with 2,3,5‐triiodobenzoic acid (TIBA) applications to cotton in multiple foliar applications, from two to five times at concentrations ranging from 5 to 62.5 g/ha on ‘Dunn 56C’ (stormproof) and (Acala 1517BR2’ (nonstormproof). Applications commenced at first blossom and continued for a period of up to 5 weeks at weekly intervals. Seed cotton yields were increased 8 to 16% by 5.0 g/ha applied five times, 25.0 g/ha applied three times, 62.5 g/ha applied two times, 62.5 g/ha applied three times, and 58.7 g/ha applied two times. First fruiting nodes in both cultivars were generally lowered; also boll counts and boll weight were increased with most TIBA treatments that increased seed cotton yield. No morphological response of dwarfing, epinasty, or leaf crinkling were observed with any of the TIBA treatments as had been reported by other workers for other crops.