i) Cyclanilide Application
Cyclanilide [1-(2,4-dichlorophenylaminocarbonyl)-cyclopropane carboxylic acid] is a plantgrowth regulator that is registered for use in cotton at different stages of growth. It is used for two different purposes, and is only used in combination with other PGRs. Whencyclanilide is combined with mepiquat chloride, it is used for early season growth management,to prevent excessive vegetative growth, and produce a uniform stand. Alternatively, cyclanilideis combined with ethephon and utilized at the end of the season as harvest aid, primarily fordefoliation, boll opening and prevent vegetative re-growth.Cyclanilide, mepiquat chloride, and ethephon each have a distinct mechanism of action.Mepiquat chloride is an inhibitor of gibberellic acid (GA) biosynthesis, and was first registeredin the1980's to manage vegetative growth. In 2006, mepiquat chloride combined with cyclanilide was registered for the same use. Ethephon is an ethylene releasing agent and was firstregistered as a harvest aid in cotton in the 1980s. Cyclanilide appears to synergize or enhancethe activity of the primary growth regulator, because mepiquat chloride or ethephon alone willreduce growth or initiate defoliation, respectively. Cyclanilide used alone will block apicaldominance and enhance lateral branching in apple nursery stockandin kidney beans. The mechanism of action of cyclanilide is notknown, and the purpose of this research was to study cyclanilide’s physiologic activity.
|Appearance||White to off-white powder||Complies|
|Solubility||Soluble in acetone, chloroform and slightly soluble in water||Complies|
|Melting Point||189.5°C - 190°C||Complies|
|Acetone Insoluble||0.5% Max.||0.21%|