HL Deb 07 February 1996 vol 569 c20WA
The Countess of Mar

asked Her Majesty's Government:

How many insect pest species and weeds common to the United Kingdom have developed resistance to (i) at least one commonly applied chemical and (ii) to all widely used pesticides and herbicides.

Lord Lucas:

Eleven indigenous species of insect pests and 11 indigenous species of weeds are currently recorded as having developed resistance to at least one pesticide. No species are recorded as having developed resistance to all widely used pesticides and herbicides.