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John L. Maas, John M. Enns, Stan C. Hokanson and Richard L. Hellmich

Larvae of several insects injure and kill strawberry (Fragaria ×ananassa Duchesne) plants by burrowing into and hollowing out plant crowns. Occasionally, these infestations are serious enough to cause heavy economic losses to fruit producers and nursery plant growers. In 1997 in Beltsville, Md., we observed wilting and dying mature plants and unrooted runner plants in two experimental strawberry plantings. Injury by larvae was extensive; large cavities occurred in crowns, and the central pith tissues were removed from stolons and leaf petioles. Often, insect frass was seen at entrance holes. Larvae removed from hollowed-out parts of injured plants were identified as the European corn borer (Ostrinia nubilalis Hübner) in their fifth instar stage. Their presence in this instance also was associated with a cover crop of millet [Setaria italica (L.) P. Beauv., `German Strain R'] planted between the strawberry rows for weed suppression. This is the first published report of the European corn borer attacking strawberry. Although this insect may occur only sporadically in strawberry plantings, it may become important in the future. Growers and other professionals should become aware of this new strawberry pest and recognize that its management in strawberry will be different from management of other crown-boring insects.

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Emily K. Dixon, Bernadine C. Strik, Luis R. Valenzuela-Estrada and David R. Bryla

in these affected canes and identified as raspberry crown borer ( P. marginata Harris). The presence of crown borer was assessed in August of both years by counting the number of plots in which at least one infested primocane was discovered when

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Charles Meister

The IR4 Specialty Crops Program was established to assist in the registration of pest control products for minor uses. The national program, headquartered at Rutgers University and operating through four regions with a network of scientists in every state develops lists of grower needs, prioritizes projects and develops protocols to secure EPA tolerances that lead to labels. Every year IR4 works on pest control products needed by the fruit industry. Pest control products being researched for 2006 include: Insect and disease control in tropical fruit crops: Lepadopterous larvae control in peaches with Avaunt, Danitol, and Spintor: Mite and raspberry crown borer control in blackberry: Weed control in blueberry with Sandea and Spartan: Botrytis and anthracnose control in strawberry.

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John R. Clark, Margaret Worthington and Taunya Ernst

. Raspberry crown borer ( Pennisetia marginata Harris) was controlled by a single application of a labeled insecticide in October of each year. Ratings for a range of characteristics were taken for 9 years (2010–18). Fruit ratings were taken based on a rating

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Kathleen Demchak

2001–04, and yields over the 4 years averaged the equivalent of over 25,000 lb/acre ( Table 2 ). Berry size and berry quality remained good throughout all 4 years. Unfortunately, a buildup of raspberry crown borer ( Pennisetia marginata ) in the crowns

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John R. Clark and Penelope Perkins-Veazie

differences in the data. After floricane harvest in 2008, raspberry crown borers, Pennisetia marginata (Harris), were discovered in the crowns of the plants, and the damage to plant crowns likely contributed to the uneven performance among replications and

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John R. Clark

raspberry crown borer ( Pennisetia marginata Harris) infestation was found throughout the planting on all genotypes, and this likely contributed to the yield reduction. Consistent production among years and locations is a positive reflection of yield

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John R. Clark

. Raspberry crown borer ( Pennisetia marginata Harris) was controlled by a single application of a labeled insecticide in October of each year. All plots were irrigated as needed using overhead sprinkler irrigation. Floricane fruit ratings were taken for all

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Daniela M. Segantini, Renee T. Threlfall, John R. Clark, Luke R. Howard and Cindi R. Brownmiller

a single application of liquid lime sulfur (94 L·ha −1 ) at budbreak for control of anthracnose ( Elsinoë veneta [Burkholder] Jenk.). Raspberry crown borer ( Pennisetia marginata [Harris]) was controlled by a single application of a labeled

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John R. Clark and Alejandra Salgado

fungicide applied to any plantings in any year. Raspberry crown borer ( Pennisetia marginata Harris) was controlled by a single application of a labeled insecticide in October of each year. All plots were irrigated as needed using overhead sprinkler