Indole-3-acetic acid is the most common used auxin for stimulation of plant body development. I am interested about the use and quantification of effective amount of IAA for crops. Thank you for the answers.
IAA is an unstable auxin hormone which can't be applied directly. Usually IBA is used as a rooting hormone for rooting of stem cutting. 16 ppm IBA is usefull for rooting on soft wood cutting.
IAA is a naturally occurring auxin and in plant tissues.easily destroyed by various enzyme systems ,in particular I AA oxidase and IAA peroxidase which normally control IAA concentrations , so i do not recommend using IAA, accordingly, i suggest using the auxin I BA, which also occurs naturally in many plants, and widely used for exogenous application. The range of concentrations is10-25mg-L. you could also use the synthetic auxin,N A A, at similar concentrations,but I BA is preferred for safety of human consumption of treated plant materials.
Minimum concentration of IAA could be anywhere 5-10 mg/litre , but per hectare basis , it again depends on the type of plant , you are using , annual or perennial . In perennials , canopy size is a function of plant age . According to plant canopy , you can judge the amount to be given on per plant basis so that whole canopy is drenched , and then , using the simple mathematics, how many plants are accommodated in one hectare , you can easily calculate the IAA on per hectare basis. I hope , this will suffice .
Thank you very much for your assistance. We produce natural vermicompost tea and have complete analysis of fytohormones. We would like to predict the effect of this coctail on different crops. I ;d liket o know which BBCH phase is the most suitable for application. We applicate approximately 0,1 mg IAA per hectare foliarly, could be this concentration effective on yield?
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