Timing of injury and efficacy of soil-applied insecticides against wireworms on potato in Virginia

Kuhar, Thomas P.; Álvarez, Juan M.

doi:10.1016/j.cropro.2007.11.011

Cited by 38 publications

(35 citation statements)

References 30 publications

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“…This increase in damage occurred even though tuber size did not increase between the harvest periods, and generally occurred in all treatments in addition to the controls (Tables 2Ð 4). An increase in wireworm damage to tubers with later dates of harvest has been reported elsewhere (Parker andHoward 2001, Kuhar andAlvarez 2008), and illustrates the beneÞt of earlier harvesting whenever practical.…”

Section: Resultsmentioning

confidence: 87%

“…Although blemish control was demonstrated with neonicotinoids in these trials against A. obscurus and in trials conducted in Virginia against M. communis, C. lividus, and C. vespertinus (Kuhar and Alvarez 2008), blemish control has been inadequate in other areas of Canada (i.e., Ontario: Tolman et al 2005;and PEI: Noronha et al 2007). These differences are possibly because of the different species present in Ontario (Melanotus spp.)…”

Section: Discussionmentioning

confidence: 95%

“…Of all the treatments tested, however, these combined treatments had the lowest number of blemishes, and together would provide an acceptable alternative to the systemic standard phorate (Thimet 15G) for the broad spectrum control of subterranean (e.g., wireworms) and foliar (e.g., CO potato beetle, Leptinotarsa decemlineta Say) pests of potato. Blemish control would be achieved by the combined effects of the nonsystemic chlorpyrifos and systemic neonicotinoids, and control of above ground pests by the neonicotinoids alone (Kuhar et al 2007;Kuhar and Alvarez 2008). In B.C., where phorate has been withdrawn from use in potatoes because of wildlife concerns (Wilson et al 2002), a combination of liquid chlorpyrifos (Pyrinex 480 EC) with clothianidin-treated potato seed (Titan ST) is now commonly used for the effective control of wireworms and other above ground insects.…”

Section: Discussionmentioning

confidence: 99%

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Further Studies on Wireworm Management in Canada: Damage Protection Versus Wireworm Mortality in Potatoes

Vernon¹,

Herk²,

Clodius³

et al. 2013

jnl. econ. entom.

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The efficacy of various insecticides and application methods in protecting potatoes from wireworm (Agriotes obscurus L.) damage as well as reducing wireworm populations was studied over 5 yr in Agassiz, British Columbia. Protection from wireworm damage was measured by the number of blemishes to daughter tubers, and effects on wireworm populations were measured by sampling soil around seed potatoes and/or by bait traps the following spring. Organophosphates registered for wireworm control in the United States and/or Canada (phorate and chlorpyrifos), significantly reduced blemishes to tubers by, respectively, 92.2 and 90.2%, and populations of large (> or = 9 mm long = 'resident') wireworms by 83.4 and 71.0% relative to controls. Similar reductions in smaller (< 9 mm long = 'neonate') wireworms were also observed. Neonicotinoids (imidacloprid, clothianidin, and thiamethoxam) tested as seed piece treatments at approximately 12.5 g active ingredient/100 kg potato seed reduced blemishes by, respectively, 19.1, 71.6, and 90.6%, but resident wireworms were only reduced by, respectively, 22.0, 29.1, and 51.8%. Significant mortality of neonates was not observed with any neonicotinoid treatment. With the possible exception of thiamethoxam, where significant reduction in resident wireworms occurred, it is likely that the blemish protection provided without significant wireworm mortality with imidacloprid and clothianidin treatments was because of long-term wireworm intoxication followed by population recovery. The phenyl pyrazole, fipronil, applied as an in-furrow spray reduced blemishes by 94.3%, and resident wireworm populations could not be detected in plots the following spring. Neonates were reduced by 93.3%, indicating excellent residual conotrol had occurred with fipronil. These studies indicate that tuber protection by fipronil and currently registered organophosphates is likely because of significant early season mortality of wireworms, whereas neonicotinoids generally provide control through long-term morbidity without high levels of mortality occurring.

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Section: Resultsmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Further Studies on Wireworm Management in Canada: Damage Protection Versus Wireworm Mortality in Potatoes

Vernon¹,

Herk²,

Clodius³

et al. 2013

jnl. econ. entom.

View full text Add to dashboard Cite

show abstract

“…lividus is present throughout the southeastern United States and north along the east coast into Pennsylvania, Delaware, and New Jersey (Thomas 1940, Jewett 1946, Guthrie et al 1963, Herbert et al 1992, Kuhar and Alvarez 2008. The larva is a known pest of corn and occasionally tobacco (Deen and Cuthbert 1955, Kulash and Monroe 1955, Guthrie et al 1963, Herbert et al 1992.…”

Section: Discussionmentioning

confidence: 98%

“…It occurs throughout the eastern and midwestern United States. The larva is an important pest of corn, sugarcane, potato, and celery (Apium graveolens L.), but it also may attack tobacco and peanut (Thomas 1940, Kulash and Monroe 1955, Riley and Keaster 1979, Jansson and Lecrone 1989, Jansson et al 1989, Jansson and Lecrone 1991, Herbert et al 1992, Cherry 2007, Kuhar and Alvarez 2008. Larval populations in southern Florida are known to increase following early-planted sorghum (Sorghum L.) (Seal et al 1992b).…”

Section: Discussionmentioning

confidence: 99%

Influence of Preceding Crop on Wireworm (Coleoptera: Elateridae) Abundance in the Coastal Plain of North Carolina

Willis¹,

Abney²,

Holmes³

et al. 2010

jnl. econ. entom.

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Three studies were conducted to determine the effect of preceding crop on wireworm (Coleoptera: Elateridae) abundance in the coastal plain of North Carolina. In all three studies, samples of wireworm populations were taken from the soil by using oat, Avena sativa L., baits. Treatments were defined by the previous year's crop and were chosen to reflect common crop rotations in the region. Across all three studies, eight wireworm species were recovered from the baits: Conoderus amplicollis (Gyllenhal), Conoderus bellus (Say), Conoderus falli (Lane), Conoderus lividus (Degeer), Conoderus scissus (Schaeffer), Conoderus vespertinus (F.), Glyphonyx bimarginatus (Schaeffer), and Melanotus communis (Gyllenhal). The effect of corn, Zea mays L.; cotton, Gossypium hirsutum L.; fallow; soybean, Clycine max (L.) Merr.; sweet potato, Ipomoea batatas (L.) Lam.; and tobacco (Nicotiana spp.) was evaluated in a small-plot replicated study. M. communis was the most frequently collected species in the small-plot study and was found in significantly higher numbers following soybean and corn. The mean total number of wireworms per bait (all species) was highest following soybean. A second study conducted in late fall and early spring assessed the abundance of overwintering wireworm populations in commercial fields planted to corn, cotton, peanut (Arachis hypogaea L.), soybean, sweet potato, and tobacco in the most recent previous growing season. C. lividus was the most abundant species, and the mean total number of wireworms was highest following corn and soybean. A survey was conducted in commercial sweet potato in late spring and early summer in fields that had been planted to corn, cotton, cucurbit (Cucurbita pepo L.), peanut, soybean, sweet potato, or tobacco in the most recent previous growing season. C. vespertinus was the most abundant species, and the mean total number of wireworms per bait was highest following corn.

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New Chemistry Pesticides for Management of Potato Pests

Kuhar

McCullough

2022

Sustainable Management of Potato Pests and Diseases

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Timing of injury and efficacy of soil-applied insecticides against wireworms on potato in Virginia

Cited by 38 publications

References 30 publications

Further Studies on Wireworm Management in Canada: Damage Protection Versus Wireworm Mortality in Potatoes

Further Studies on Wireworm Management in Canada: Damage Protection Versus Wireworm Mortality in Potatoes

Influence of Preceding Crop on Wireworm (Coleoptera: Elateridae) Abundance in the Coastal Plain of North Carolina

New Chemistry Pesticides for Management of Potato Pests

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