Six core infrastructure industries grew by a disappointing 6% in September this year as against 10.6% a year ago.The growth rate during the April-September period of 2007-08 also dropped to 6.6% from 8.7% in the same period last fiscal.Among the six key infrastructure industries, which contribute 26.7% to the overall industrial growth, crude petroleum production put up the worst performance with a negative growth of 0.7% against 9.4% growth in the year-ago period.
