Kumar's fortune, which is lately benefiting from a rise in commodity prices and Hindalco's prosperity, rests on a globe-girdling empire with a presence in 27 countries.
Officials are planning future beetle surveys and will try to limit the infestation with "girdling, " in which thick strips of bark are removed from around infested ash trees.
In a commentary given at the heart meeting, Bruce Rosengard of the University of Cambridge in the U.K. said the big question that remains is how big the benefit of "girdling the heart" is to patients.