Nematicide effects on non-target nematodes in bermudagrass

Waldo, Benjamin D.; Grabau, Zane J.; Mengistu, Tesfamariam; Crow, William T.

doi:10.21307/jofnem-2019-009

Cited by 29 publications

(38 citation statements)

References 25 publications

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“…This is in contrast to data reported from Florida where fluopyram proved effective against sting (Belonolaimus longicaudatus), root-knot, ring, and other plant-parasitic nematodes (Crow et al, 2017). The nematicide also had striking impacts on many other nonparasitic nematodes such as bacterivores, fungivores, and omnivores (Waldo et al, 2019). In the California trials, fluopyram applications were most likely not able to move past the putting greens' thatch layer and into the soil to significantly influence the plant-parasitic nematode populations.…”

Section: Discussionmentioning

confidence: 98%

Fluopyram Controls Shoot-galling Caused by Pacific Shoot-gall Nematode and Improves Turf Quality in Annual Bluegrass Putting Greens

Petelewicz

Orliński

Schiavon

et al. 2020

hortte

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Golf courses in coastal regions of northern California are often faced with severe injury caused by pacific shoot-gall nematodes (Anguina pacificae) on their annual bluegrass (Poa annua) host in putting greens. For years, fenamiphos was used for mitigating disease outbreaks until its registration was withdrawn in 2008. An alternative product containing azadirachtin was intended for nematode suppression. Still, it required repeated applications throughout the year with questionable efficacy, making attempts to lessen the impact of the pathogen costly. This study evaluated fluopyram as a novel nematicide for control of pacific shoot-gall disease. Various application frequencies and rates were tested at several golf courses affected by the nematode. Results revealed that fluopyram applied once at 0.22 lb/acre reduced the number of new shoot-galls and improved annual bluegrass appearance for several months. Increased rates and application frequency occasionally improved the efficacy further. Although the visual quality of turf treated with this plant protection compound was tremendously enhanced, and the number of new shoot-galls was reduced, rarely a significant effect was observed on the population density of several soil-dwelling plant-parasitic nematodes, including pacific shoot-gall nematode. It is hypothesized that fluopyram did not move significantly past the thatch layer and into the soil. However, it effectively reduced the ability of pacific shoot-gall nematode juveniles to induce new shoot galls. Due to its long half-life, it likely protected against both new nematode infections and dissemination of pacific shoot-gall nematode when the shoot-galls decomposed.

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Section: Discussionmentioning

confidence: 98%

Fluopyram Controls Shoot-galling Caused by Pacific Shoot-gall Nematode and Improves Turf Quality in Annual Bluegrass Putting Greens

Petelewicz

Orliński

Schiavon

et al. 2020

hortte

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show abstract

“…The impact of fluopyram applied to the soil as a nematicide or fungicide on non-target organisms has been little studied. Fluopyram was found to reduce the number of free-living nematodes for a long period (up to 238 days after application), especially bacterivores, fungivores, and omnivores, and to have the potential to affect all nematode feeding groups [66]. In peanut fields, 0.24 kg ha −1 fluopyram did not affect any free-living nematode trophic groups or individual genera, although the same treatment also did not reduce the population of Meloidogyne arenaria [90].…”

Section: Toxicity and Impact On The Environmentmentioning

confidence: 91%

“…In the same study, fosthiazate was found not to affect the free-living nematodes' density, but it did affect their diversity. Similarly, free-living nematodes in the turfgrass soil were much less affected by fluensulfone compared to abamectin or fluopyram, although the latter two improved the turfgrass green cover [66].…”

Section: Toxicity and Impact On The Environmentmentioning

confidence: 93%

From Old-Generation to Next-Generation Nematicides

Oka

2020

Agronomy

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The phaseout of methyl bromide and the ban on, or withdrawal of, other toxic soil fumigants and non-fumigant nematicides belonging to the organophosphate and carbamate groups are leading to changes in nematode-control strategies. Sustainable nematode-control methods are available and preferred, but not always effective enough, especially for cash crops in intensive agriculture. A few non-fumigant nematicides, which have a relatively high control efficacy with a low toxicity to non-target organisms, have been released to the market or are in the process of being registered for use. Fluensulfone, fluopyram, and fluazaindolizine are the three main and most promising next-generation nematicides. In this paper, several aspects of these non-fumigant nematicides are reviewed, along with a brief history and problems of old-generation nematicides.

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“…Further, fluensulfone has less toxicity to Caenorhabditis elegans, a free-living nematode, than to M. javanica [25]. Recently, it was reported that fluensulfone had less impact to non-target nematodes in turfgrass, while its damage control of ground cover was limited [36]. For field crops, fluensulfone's efficacy on other free-living nematodes as well as M. incognita has not been tested until now.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Nematicidal Activity of Fluensulfone against Non-Target Free-Living Nematodes under Field Conditions

et al. 2019

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The use of nematicides with reduced toxic side-effects against non-target free-living nematodes is a favorable option for farmers to control plant-parasitic nematodes. The nematicide fluensulfone was registered in several countries for the control of the root-knot nematodes, Meloidogyne spp. among other plant-parasitic nematodes. This study aimed to evaluate the nematicidal activity of fluensulfone against non-target nematode fauna in four field experiments, each under different conditions (soils types and plant hosts). Nematodes extracted from soil samples were classified and counted based on their morphological characters. Fluensulfone significantly reduced damage caused by root-knot nematodes to tomato and sweet potato plants, while overall non-target free-living nematode population densities were maintained at the same level as those in control. Different diversity indices (e.g., Shannon-Wiener H’, Simpson’s D, species richness, evenness J’, maturity indices) and principal component analyses in the four experiments showed that fluensulfone treatment kept a similar diversity level of non-target free-living nematode fauna to that of the non-treated control. The results suggested that fluensulfone may have minimal impact to free-living nematode fauna in both population density and diversity when the nematicide was applied to control Meloidogyne spp.

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Nematicide effects on non-target nematodes in bermudagrass

Cited by 29 publications

References 25 publications

Fluopyram Controls Shoot-galling Caused by Pacific Shoot-gall Nematode and Improves Turf Quality in Annual Bluegrass Putting Greens

Fluopyram Controls Shoot-galling Caused by Pacific Shoot-gall Nematode and Improves Turf Quality in Annual Bluegrass Putting Greens

From Old-Generation to Next-Generation Nematicides

Evaluation of Nematicidal Activity of Fluensulfone against Non-Target Free-Living Nematodes under Field Conditions

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