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ARS Home » Northeast Area » University Park, Pennsylvania » Pasture Systems & Watershed Management Research » Research » Publications at this Location » Publication #110635
Title: DAMAGE TO WHITE CLOVER STOLONS CAUSED BY LARVAE OF ISCHNOPTERAPION VIRENS (HERBST), A NEW PEST OF CLOVERS IN THE NORTHEAST

Author
item Byers, Robert
item Sanderson, Matt

Submitted to: Northeast Regional Field Crops Insect Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 2/20/2000
Publication Date: 2/23/2000
Citation: Byers, R.A., Sanderson, M.A. Damage to white clover stolons caused by larvae of ischnopterapion virens (herbst), a new pest of clovers in the northeast. Northeast Regional Field Crops Insect Conference Proceedings. 2000. p. 4-5.

Interpretive Summary:

Technical Abstract: A Palearctic weevil, Ischnopterapion virens (Herbst), a pest of red clover in Europe recently has been introduced in the eastern U.S. It was first detected in 1994 in eastern Pennsylvania in pitfall traps on two dairy farms. Surveys in 1997-1999 showed it is present in seven states. We measured the level of infestation of white clover in two grazed white clover-orchardgrass pastures in Berks County, PA, during 1999. The pastures were a mixture of Pennlate orchardgrass and 'Will' white clover. An average of 70% to 80% of the primary stolons of white clover had feeding tunnels caused by I. virens. Forty percent of secondary stolons were also infested. Less than 5% of tertiary stolons had tunnels.