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Japanese Knotweed

Question for Department for Environment, Food and Rural Affairs

UIN HL9707, tabled on 28 October 2020

To ask Her Majesty's Government what plans they have to advance the use of biological control of Japanese knotweed.

Answered on

11 November 2020

We continue to work closely with the Centre for Agriculture and Bioscience International (CABI) on researching and developing biological control methods for Japanese knotweed. Following extensive trials, we approved the release of the psyllid – Aphalara itadori in England to tackle Japanese Knotweed (Fallopia japonica).

We are also funding research into the fungal leaf-spot Mycosphaerella polygoni-cuspidatii, which has potential as a mycoherbicide for Japanese Knotweed.