Movement of Corn Rootworm Larvae (Coleoptera: Chrysomelidae) Between Border Rows of Soybean and Corn in a Strip Intercropping System

Ellsbury, M. M.; Exner, Derrick N.; Cruse, Richard M.

doi:10.1093/jee/92.1.207

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…Previous studies have demonstrated that WCR larvae are capable of moving 1 m through the soil to feed on corn roots (Strnad and Bergman 1987;Gustin and Schumacher 1989;MacDonald and Ellis 1990;Ellsbury et al 1994). In other strip plot studies, WCR root injury to outside corn rows of has been shown to be significantly higher than injury to inside rows (Ellsbury et al 1999). However, this increased root injury did not lead to significant differences in yield between interior and outer rows of corn.…”

Section: Discussionmentioning

confidence: 75%

“…The data from the current study show that WCR beetles were laid at least 6 m into soybean and winter wheat strips, which is far beyond the border rows of the plot. Ellsbury et al (1999) also observed that WCR laid eggs in soybean plots in a strip plot setting. Although rootworm feeding damage did not exceed the threshold in the first-year strips, producers who use strip cropping systems may be unable to control WCR exclusively through crop rotation alone since larvae are capable of movement through the soil.…”

Section: Discussionmentioning

confidence: 76%

See 1 more Smart Citation

Oviposition site selected by the western corn rootworm (Diabrotica virgifera virgifera Leconte) in southern Ontario strip plots

Knight¹,

Pauls²,

Sears³

et al. 2005

Can. J. Plant Sci.

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Western corn rootworm (WCR), Diabrotica virgifera virgifera L., is the most serious insect pest of corn, Zea mays L., in North America. Crop rotation had successfully controlled this pest until the late 1980s when a new biotype that lays its eggs in non-corn crops was discovered in Illinois. This biotype has spread to parts of Indiana, Michigan, and Ohio, and threatens Ontario. By using emergence cages, Pherocon Am® sticky traps and corn root ratings, egg-laying behaviour of WCR in Ontario was assessed in strip crop settings that represent typical cropping systems of southern Ontario. WCR adults were active in both soybean and winter wheat fields in July and August. Larval feeding and adult emergence in first-year corn fields following soybean and wheat were similar, confirming that oviposition did occur in both crops. These data do not, however, provide conclusive evidence for the presence of the rotation resistant WCR in Ontario because previous studies have demonstrated that WCR are capable of utilizing other crops for oviposition. Key words: Western corn rootworm, Diabrotica virgifera virgifera, strip plots, corn, soybean, wheat (winter)

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 76%

Oviposition site selected by the western corn rootworm (Diabrotica virgifera virgifera Leconte) in southern Ontario strip plots

Knight¹,

Pauls²,

Sears³

et al. 2005

Can. J. Plant Sci.

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“…Reasons for the clustering of insect distributions can be found (i) in environmentally mediated mortality factors that act on pest populations, which may change spatially as well as seasonally and (ii) in biological factors such as sex pheromones (Raemisch & Turpin, 1984;Schalk et al, 1990) or limited movement of larvae (Ellsbury et al, 1999b). In contrast to A. ustulatus , many studies at different population levels or at different scales have already reported such spatial dependencies for D. v. virgifera or other Diabroticite pests, especially from North America (Steffey & Tollefson, 1982;Bergman et al, 1983;Ellsbury et al, 1996Ellsbury et al, , 2004Darnell et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Spatial clustering of Diabrotica virgifera virgifera and Agriotes ustulatus in small‐scale maize fields without topographic relief drift

Toepfer

Ellsbury

Eschen

et al. 2007

Entomologia Exp Applicata

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The soil-living larvae of Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) and Agriotes ustulatus Schaller (Coleoptera: Elateridae) can cause economic damage to maize roots, Zea mays L. (Poaceae). This study investigated the spatial clustering of both pests in four small-scale maize fields in southern Hungary, where clustering had been observed but not expected due to the lack of topographic relief drifts and soil structuring. Between 2000 and 2002, numbers of D. v. virgifera larvae and adults and of A. ustulatus larvae were determined at four randomly chosen georeferenced maize plants in each of 24 plots per field. Soil moisture, soil bulk density, and vegetational characteristics were assessed. Moran's I test for spatial autocorrelations, semivariogram analyses, and interpolated mapping revealed that D. v. virgifera larvae and adults were spatially clustered in 67 and 50% of cases, respectively. Larvae of A. ustulatus were clustered in 75% of cases. Diabrotica virgifera virgifera larval distributions were mainly determined by increasing weed density (negative correlation), in particular with high densities of Cirsium arvense (L.) (Asteraceae), as well as by increasing soil moisture (negative correlation). Adult distributions of D. v. virgifera were mainly determined by the density distribution of flowering maize. They were moreover correlated with larval distribution and with the adult distribution of the previous year. The density distributions of male adults differed from those of females. Female density was additionally correlated with higher soil moisture and Poaceae density, e.g., with Sorghum halepense (L.) Pers. No relation was found between the larvae of A. ustulatus and D. v. virgifera . Agriotes ustulatus larval distributions were mainly determined by vegetational cover (correlation with less cover). Conclusively, male and female D. v. virgifera adults, larvae of D. v. virgifera , and larvae of A. ustulatus will display different spatial clustering even within ostensibly homogeneous habitats of flat small-scale maize fields.

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“…(Tabela 3). Ellsbury et al (1999) também constataram diferenças entre a abundância de espécies de crisomelídeos em sistemas de consorciação sojamilho. No presente trabalho, não foram determinadas as causas que possibilitaram as espécies de crisomelídeos apresentarem densidades populacionais contrastantes na soja consorciada com milho.…”

Section: Resultsunclassified

Pragas e inimigos naturais na soja e no milho cultivados em sistemas diversificados

Cividanes

Yamamoto

2002

Sci. agric. (Piracicaba, Braz.)

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RESUMO: A consorciação de culturas e o plantio direto podem influenciar a dinâmica populacional de insetos, aumentando ou diminuindo a densidade populacional de pragas e de inimigos naturais. Deste modo, avaliaramse os efeitos de sistemas de plantio direto e da consorciação soja [Glycine max (L.) Merrill] e milho (Zea mays L.) sobre as populações de insetos-pragas e inimigos naturais. Os tratamentos constituíram um fatorial 3x2 (monocultura de soja, monocultura de milho, consorciação soja-milho em plantio direto e plantio convencional). Os insetos foram amostrados pelo método do pano, rede entomológica e procura visual. No milho, a ocorrência de insetos-pragas da parte aérea e insetos predadores não foi influenciada pelo manejo do solo. Lagartas de Helicoverpa zea ocorreram em maior número (5,1) no milho em consorciação. Na soja, adultos de Anticarsia gemmatalis e do predador Cycloneda sanguinea foram mais abundantes em plantio direto, respectivamente, 0,4 e 2,4 insetos. Observou-se maior número do sirfídeo Toxomerus sp. em plantio convencional (1,3). Nas condições de consorciação, verificou-se baixo número de Diabrotica gracilenta (11,5) na soja, enquanto que Maecolaspis sp. (5,0) PESTS AND THEIR NATURAL ENEMIES ON SOYBEAN AND CORN GROWN IN DIVERSIFIED SYSTEMSABSTRACT: Intercropping and no-tillage systems can affect the population dynamics of insects, increasing or decreasing the population density of pests and natural enemies. The objective of this study was to evaluate the effects of no-tillage and strip intercropping of soybean [Glycine max (L.) Merrill] and corn (Zea mays L.) on the abundance of insect pests and their natural enemies. Plots were arranged in a randomized complete block design in a 3 x 2 factorial experiment (soybean monoculture, corn monoculture, strip intercropping of soybean-corn under no-tillage and conventional tillage). Insects were sampled using sweep net, ground cloth and by visual search. For corn, the occurrence of insect pests and predators was not affected by soil management practices. Larvae of Helicoverpa zea occurred in higher number (5.1) for corn under strip intercropping. For soybean, adults of Anticarsia gemmatalis and of the predator Cycloneda sanguinea were more abundant for the no-tillage plots, respectively, 0.4 and 2.4 insects. A higher number of the syrphid Toxomerus sp. was observed for the conventional tillage plots (1.3). Under strip intercropping conditions, low numbers of Diabrotica gracilenta (11.5) were observed, while Maecolaspis sp.

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Movement of Corn Rootworm Larvae (Coleoptera: Chrysomelidae) Between Border Rows of Soybean and Corn in a Strip Intercropping System

Cited by 10 publications

References 13 publications

Oviposition site selected by the western corn rootworm (Diabrotica virgifera virgifera Leconte) in southern Ontario strip plots

Oviposition site selected by the western corn rootworm (Diabrotica virgifera virgifera Leconte) in southern Ontario strip plots

Spatial clustering of Diabrotica virgifera virgifera and Agriotes ustulatus in small‐scale maize fields without topographic relief drift

Pragas e inimigos naturais na soja e no milho cultivados em sistemas diversificados

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