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  Ineffectiveness of Different Sticky Traps for Monitoring Cranberry Tipworm, Dasineura oxycoccana (Johnson), Adults in Cranberry Fields, Vaccinium macrocarpon Aiton, in New Brunswick

C.M. Maund and R.J.A. Tremblay

Abstract: Three types of sticky traps, ("large rectangular yellow trap in a V-shape with the yellow side pointed downward", "small vertical yellow", "small vertical blue") were evaluated for their effectiveness to trap the adult stage of the cranberry tipworm, Dasineura oxycoccana (Johnson), [Cecidomyiidae] at a commercial cranberry, Vaccinium macrocarpon Aiton, farm and at an adjacent unsprayed area in Sunbury county, New Brunswick. Traps were placed above three cranberry varieties (Pilgrim, Stevens, Ben Lear) on the farm and one variety (Stevens) at an adjacent area. Traps were inspected approximately every seven to ten days from early-June to mid-August 2008. Traps were inspected for wings similar to that of the cranberry tipworm. Only two suspected cranberry tipworm adults were trapped, one on each of a small vertical yellow trap and a small vertical blue trap. The presence of the cranberry tipworm and degree of infestation on cranberry plant tips was evaluated at four sites by visually inspecting plant tips for cranberry tipworm maggots and damage and rearing cranberry tipworm adults from plant tips. Infestation rates of the cranberry tipworm were determined by collecting 50 plant tips from each of four sites after traps had been removed. Infestation rates ranged from 26% to 70%. All traps were ineffective at trapping cranberry tipworm adults from cranberry plants in areas where cranberry plants were obviously infested with noticeable levels of the cranberry tipworm at three sites in a commercial cranberry farm where pesticide control measures had been applied for typical cranberry insect pests and at an adjacent area where pesticides had not been applied.

Agriculture, Aquaculture and Fisheries
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