Effect of Application Timing of Oxamyl in Nonbearing Raspberry for Pratylenchus penetrans Management

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Journal of Nematology

Society of Nematologists

Subject: Life Sciences

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ISSN: 0022-300X
eISSN: 2640-396X

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VOLUME 48 , ISSUE 3 (September 2016) > List of articles

Effect of Application Timing of Oxamyl in Nonbearing Raspberry for Pratylenchus penetrans Management

INGA A. ZASADA * / THOMAS W. WALTERS

Keywords : Praytlenchus penetrans, postplant nematicide, root lesion nematode, Rubus idaeus, vydate

Citation Information : Journal of Nematology. Volume 48, Issue 3, Pages 177-182, DOI: https://doi.org/10.21307/jofnem-2017-025

License : (CC BY 4.0)

Published Online: 21-July-2017

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ABSTRACT

In 2012, theWashington raspberry (Rubus idaeus) industry received a special local needs (SLN) 24(c) label to apply Vydate L (active ingredient oxamyl) to nonbearing raspberry for the management of Pratylenchus penetrans. This is a new use pattern of this nematicide for raspberry growers; therefore, research was conducted to identify the optimum spring application timing of oxamyl for the suppression of P. penetrans. Three on-farm trials in each of 2012 and 2013 were established in Washington in newly planted raspberry trials on a range of varieties. Oxamyl was applied twice in April (2013 only), May, and June, and these treatments were compared to each other as well as a nontreated control. Population densities of P. penetrans were determined in the fall and spring postoxamyl applications for at least 1.5 years. Plant vigor was also evaluated in the trials. Combined results from 2012 and 2013 trials indicated that application timing in the spring was not critical. Oxamyl application reduced root P. penetrans population densities in all six trials. Reductions in P. penetrans population densities in roots of oxamyl-treated plants, regardless of application timing, ranged from 62% to 99% of densities in nontreated controls. Phytotoxicity to newly planted raspberry was never observed in any of the trials. A nonbearing application of oxamyl is an important addition to current control methods used to manage P. penetrans in raspberry in Washington.

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