Effectiveness of aversion therapy for procrastination
From a 2014 review article on procrastination that doesn't mention aversive therapy at all, but has this to say about treatment(s) of procrastination in general:


  Even though procrastination can contribute to many adversities among those afflicted, research concerning treatment interventions is currently scarce. (Pychyl &amp; Flett, 2012) In terms of clinical trials investigating different
  treatment interventions, there is insufficient knowledge regarding their usefulness (Rozental &amp; Carlbring,
  2013). The research also lacks validated outcome measures, randomization, and long-term follow-ups, complicating
  the results. Treatment interventions stemming from cognitive behavior therapy (CBT) are often considered
  suitable for addressing problems of procrastination—interventions such as stimulus cues, time management,
  goal-setting techniques, learned industriousness, automaticity, stimulus control, modeling, performance
  accomplishments, implementation intentions, success spirals, and fusing (Steel, 2007)—but the evidence for
  their efficacy is still unclear (Pychyl &amp; Flett, 2012).