The eight core sectors coal, crude oil, natural gas, refinery products, fertiliser, steel, cement and electricity grew by 9 percent in September last year. The growth stood at 5.8 percent in August this year.
Production in crude oil, natural gas, refinery products and fertiliser has registered a drop of 1.1 percent, 6.2 percent, 2.5 percent and 11.6 percent respectively in the month under review, according to the data released by the Commerce and Industry Ministry.
Expansion in coal, cement, steel and electricity too slowed down to 7.2 per cent, 3.2 per cent, 4 per cent and 3.8 percent respectively in September this year.
These sectors had registered a growth of 13.6 percent, 12.1 percent, 10.7 percent and 12.9 percent in September 2013 respectively.
Commenting on the numbers, rating agency ICRA said: "Although the core sector growth has slipped considerably in September in sequential terms, an earlier onset to the festive season is likely to have provided some boost to various sectors of manufacturing. Nevertheless, IIP growth is likely to have been subdued in September."
The eight core sectors have a combined weight of about 38 percent in the Index of Industrial Production (IIP).
In January 2014, the eight core industry index registered an overall growth of 1.6 percent. During April-September, the eight sectors grew by 4 percent, against 5 percent in the year-ago period.