SIR – Your readers, in particular gardeners, might be interested to learn that I have seen eight or ten yellow and black banded caterpillars hungrily eating a weed in Legrams Lane.

I first saw them on August 16 and on the same plant for the four following days.

On Wednesday’s (August 26) BBC radio PM programme there was a report about the box tree moth, whose black and yellow banded caterpillars have a devastating effect on box trees as well as a number of other plants.

These foreign invader moths are embedded in southern Britain and it seems that they are now getting a toe-hold in Yorkshire.

H Firth, Legrams Lane, Bradford