Virtually no results have been reported on the use of ethylene in the root zones of intact plants. This report is unique because of the increase of yield on cotton and sorghum through the use of soil‐injected ethylene.
For two consecutive years ethylene was applied to cotton (Gossypium hirsutum L.) as a soil treatment at 1.59 and 3.14 kg/ha, at three different stages of plant development and in three soil moisture tension regimes (0 to 30, 0 to 50 and 0 to 70 centibars). In the first study (1970) yield was increased 25% by ethylene treatment in the 0‐ to 30‐centibar moisture regime. While in the 0‐ to 50‐centibar and 0‐ to 70‐centibar regimes the yields from the ethylene treated plots were higher than those of the untreated plots the differences were not statistically significant. In th second study (1971) lint cotton yield was significantly increased 12% in the 0‐ to 70‐centibar moisture regime. Micronaire and staple length were not significantly affected by the ethylene treatments in the 1970 or the 1971 study.
In a similar study in 1970 on sorghum (Sorghum bicolor (L.) Moench.), ethylene was injected into the soil at a rate of 1.59 and 3.14 kg/ha at the 6 to 7‐ and 9‐ to 10‐leaf stages of growth. Although yields were higher in some cases, the differences were not significant at the 5% level of probability. The second study (1971) on sorghum gave a 13% significant yield increase when ethylene was injected into the soil at a rate of 1.59 kg/ha at the 6‐ to 7‐leaf stage.
Application of 2,3,5-triiodobenzoic acid (10 ppm) to monoecious cucumber plants at the first true leaf has produced predominately staminate flowers on treated plants while treatment with 2-chloroethylphosphonic acid (100 ppm) resulted in predominately pistillate flowers on treated plants. These 2 growth regulators applied together produced about the same effect as 2-chloroethylphosphonic acid alone.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.