Flies in Lofts
February, March and early April is the time of year when people find flies in lofts or flies emerging from lofts. These are usually ‘Cluster Flies’ of which there are several types but the most common type looks slightly larger than a house fly but smaller than a Blue Bottle. It is important to understand that this type of fly will not be breeding or feeding, these flies in lofts are actually hibernating and the reason they are present at this time of year is because they are coming out of hibernation. This emergence process can take several weeks depending on the ‘natural’ weather as well as artificial sources of light and heat generated by a house. In late Spring, Summer and early Autumn the most common species of Cluster Fly is parasitic on earthworms, laying eggs in the soil which hatch into grubs that borrow into the soil and bore into an earthworm that they feed off.
Treating Flies in Lofts
PEST UK specialise in treating flies in lofts. We use either one or both of the following methods of insecticide control. 1. An insecticide is applied with a ‘fogging’ or ‘misting’ machine. This is ideal for lofts and gives a quick knockdown but the drawback is that it is not as residual as: 2. A residual surface spray. This is long lasting (up to 2 months inside on clean non porous smooth surfaces). Often both are used as loft surfaces are not really suitable for residual inside sprays. None of the treatments will eliminate the fly infestation but will reduce the fly population. As the survivors defendants come back to hibernate in the same place in the Autumn it is worth having a treatment to reduce fly numbers in the future.
Flies in Lofts
PEST UK cover a wide area of England including Berkshire, Middlesex, Surrey, Oxfordshire, Hampshire, Buckinghamshire & West London.
Flies BPCA Advice