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K.H. Wang, A.R. Kuehnle and B. Sipes

Burrowing nematode, Radopholus similis, reduces flower-yield-infected anthurium fields. Genetic resistance is one alternative to chemical control of the disease in anthurium. Seventeen commercial anthurium varieties, established in vitro on anthurium nutrient medium, were inoculated with burrowing nematodes to screen for tolerance. Three months after inoculation, plant responses were compared by number of nematodes recovered and by symptom index and plant weight loss with respect to non-inoculated plants. Results show that `Mauna Kea' and `Flamingo' anthuriums are among the most tolerant, while `Ozaki' is one of the most susceptible. These results are consistent with grower field evaluation. Nematode count is positively correlated with symptom index and weight loss. The mechanism of tolerance or resistance of anthurium toward burrowing nematode is unclear. However, due to the fact that burrowing nematode is a migratory endoparasite, a preinfectional resistance or tolerance mechanism is more likely to take place.

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Andrew P. Nyczepir, Alexis K. Nagel and Guido Schnabel

-knot nematode and a migratory ectoparasite such as the ring nematode. Meloidogyne spp. penetrate at the root tip, become sedentary within the root, and form feeding sites called giant cells within the vascular cylinder region. These endoparasites remain

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Inga A. Zasada, Thomas W. Walters and John N. Pinkerton

( USEPA, 2009 ). Therefore, the red raspberry industry is at a time when long-term, economically viable plant-parasitic nematode management strategies must be developed. The root lesion nematode (RLN) is a migratory endoparasite that moves between soil and

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Thomas W. Walters, John N. Pinkerton, Ekaterini Riga, Inga A. Zasada, Michael Particka, Harvey A. Yoshida and Chris Ishida

–parasitic nematode species are of importance in red raspberry production in the Pacific northwestern United States: root lesion nematodes and the dagger nematode species Xiphinema bakeri and X. americanum ( McElroy, 1992 ). RLN is a migratory endoparasite that

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Rachel E. Rudolph, Thomas W. Walters, Lisa W. DeVetter and Inga A. Zasada

, including posts and wire, is then put in place. One of the primary production challenges red raspberry growers confront is soilborne diseases, which includes root lesion nematodes ( Zasada et al., 2015 ). This migratory endoparasite moves between soil and