Chembur- As winter approaches, Survanta insects are widely seen. However, this year, they have come prior to the season which is causing the problem to the Chembur residents. This insect is harmful, as when it bites, one feels the burning sensation and skin swells as well. These are now visible at Chembur’s Ghatla village, Khardev Nagar and Chembur Camp. Residents have urged the BMC to carry out the fogging in the area.