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research-article | 30-November-2019

Potential of entomopathogenic nematodes against the pupal stage of the apple maggot Rhagoletis pomonella (Walsh) (Diptera: Tephritidae)

reduced fruit quality and yield, and increased costs associated with pest management. If the pest remains untreated, it can reduce yield up to 70% in severe infestations (Prokopy et al., 1990; Howitt, 1993; Wise et al., 2009; Prengaman, 2018). Rhagoletis pomonella has one generation per year throughout its range (Dean and Chapman, 1973). Mature larvae exit the fruit, drop to the ground, and overwinter as pupae in the soil at 2 to 5 cm depth under the infested tree. The pupae overwinter in a stage of

Muhammad Usman, Sehrish Gulzar, Waqas Wakil, Jaime C. Piñero, Tracy C. Leskey, Laura J. Nixon, Camila Oliveira-Hofman, Shaohui Wu, David Shapiro-Ilan

Journal of Nematology, Volume 52 , 1–9

research-article | 11-March-2021

Morphology, development stages, and phylogeny of the Rhabditolaimus ulmi (Nematoda: Diplogastridae), a phoront of the bark beetle Scolytus multistriatus from the elm Ulmus glabra Huds. in Northwest Russia

sampling. In previous years, all trees that showed symptoms of dieback were found infected by the fungus Ophiostoma novo-ulmi Brasier, the causal agent of DED and vectored by the S. multistriatus (Marsham, 1802) beetle (Kalko, 2008, 2009). The elm bark with beetle galleries, as well as beetle larvae, imago, and pupae were sampled for nematodes in all locations. In total, 75 bark samples with live adult beetles and larvae were taken. In February 2019, additional 15 wood and bark samples were also

Alexander Y. Ryss, Kristina S. Polyanina, Sergio Álvarez-Ortega, Sergei A. Subbotin

Journal of Nematology, Volume 53 , 1–25

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