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Invasive Plant Program

Images of Biocontrol Success

Biological Control Agent on Target Plant Biological Control Agent on Target Plant
Agapeta zoegana on: Spotted knapweed Cyphocleonus achates on: Spotted Knapweed
Aphthona cyparissiae on: Leafy spurge Longitarsus jacobaeae on: Tansy Ragwort
Aphthona nigriscutis on: Leafy spurge Mecinus janthinus on: Dalmatian toadflax
Chrysolina hyperici on: St. John's wort Mogulones cruciger on: Hound's - tongue


Success of Agapeta zoegana on Spotted knapweed

Agapeta zoegana release on August 11, 1993.
Cyphocleonus achates added in 1996 and 1997; Larinus obtusus added in 2000.

Vertical image of release point, August 11, 1993 Vertical image of release point,
June 29, 2000
South aspect, August 11, 1993 South aspect, June 29, 2000

Success of Aphthona nigriscutis and A. cyparissiae on Leafy Spurge

Aphthona nigriscutis 1994 release on Leafy Spurge at Campbell Creek, Kamloops.

1994 June 5, 1998
1998 sign

Aphthona cyparissiae (July 21, 1989) and Aphthona nigriscutis (July 27, 1990) releases made on Leafy spurge near Juniper Heights.

July 31, 1991 August 5, 1998
July 31, 1991 August 5, 1998

Success of Chrysolina hyperici on St. John's wort

Chrysolina hyperici release made on July 13, 1952 near Fruitvale

Photo credit: Peter Harris, Agriculture Canada, July 13, 1952 July 9, 2001

Success of Cyphocleonus achates on spotted knapweed

Cyphocleonus achates release made in 1988 on spotted knapweed at Cinnamon Ridge, Kamloops.

MoFR staff collecting Cyphocleonus achates, August 28, 1992. September 1996

Cyphocleonus achates 1989 and 1999 release at 9 Mile West.

(Supplemented with Agapeta zoegana in 1992 and 1994 and Larinus minutus in 1996.)
1993 1997

Success of Longitarsus jacobaeae on Tansy Ragwort

Longitarsus jacobaeae release made on November 18, 1988 on Vancouver Island.

Ministry of Agriculture and Lands Ministry of Agriculture and Lands
Summer 1990 Fall 1997

Success of Mecinus janthinus on Dalmatian toadflax.

Mecinus janthinus release on Dalmatian toadflax at Morrissey Creek, release date April 5, 1994.

June 13, 1996 June 18, 1998

Mecinus janthinus release made near Williams Lake in 1994.

1997 June 11, 1998

Success of Mogulones cruciger on Hound's-tongue.

Mogulones cruciger release made on May 3, 2001 near Princeton

June 28, 2003 June 23, 2004
June 20, 2005 June 20, 2006

Mogulones cruciger treatment on hound's-tongue. Released on April 21, 1999 at Robbins Range, near Kamloops.

Mogulones cruciger treatment on hound's-tongue-before treatment Mogulones cruciger treatment on hound's-tongue-after treatment
June 7, 2000 July 9, 2001

Mogulones cruciger release on May 12, 1998 on Adams Lake Road.

Mogulones cruciger treatment on hound's-tongue-before treatment Mogulones cruciger treatment on hound's-tongue-after treatment
May 12, 1998 June 28, 2001



"Healthy, functioning BC ecosystems, free of the impacts of invasive plants."