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

Abstract

In 2012, the Washington raspberry (Rubus idaeus) industry received a special local needs (SLN) 24(c) label to apply Vydate L Ò (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.

Efficacy of nonfumigant nematicides against Meloidogyne javanica as affected by soil temperature under pasteurized and natural soil conditions

“…Similar results were observed for fluensulfone on M. hapla and M. javanica J2s in vitro. 7 Other studies also have suggested that nematicide application at higher soil temperatures is more efficacious than at lower soil temperatures, 21 as at low temperatures nematodes are less active and as such less sensitive to nematicides. Several studies have shown that plant-parasitic nematodes were more insensitive to nematicides at lower temperatures resulting in higher nematicide doses to be efficacious.…”

Current Insights into Migratory Endoparasitism: Deciphering the Biology, Parasitism Mechanisms, and Management Strategies of Key Migratory Endoparasitic Phytonematodes

“…Post-plant application of the systemic nonfumigant nematicide oxamyl (Vydate ® ) has provided effective control against the root-lesion nematode, P. penetrans, in raspberries (Rubus idaeus) during field trials in Washington [132]. Another nonfumigant nematicide that has been registered in several countries for crop protection against multiple nematodes, predominantly the root-lesion, potato rot, and pine wood nematode, is the contact nematicide fosthiazate (Nemathorin ® ) [133].…”

Volunteer rapeseed infestation and management in corn

“…Rapeseed plant extracts reduce germination of Amaranthus retroflexus L., Echinochloa colonum (L.) Link, Portulaca oleracea L., Physalis angulata L., and Solanum nigrum L. by approximately 20%–60% (Uremis et al., 2009). Along with weed control, glucosinolate can also suppress other pest groups (Ban Goreta et al., 2012; Brown & Morra, 1997; Haramoto & Gallandt, 2004) including plant–parasitic nematodes (Wu et al., 2011; Zasada et al., 2009). Grass cover crop species provide greater weed suppression than brassica species (Baraibar et al., 2018), but grass species do not have a tap root system for improving soil physical properties, nor do they contain glucosinolate for suppression of pests.…”