Influence of Corn Phenology on Adult Western Corn Rootworm (Coleoptera: Chrysomelidae) Distribution

Darnell, Stephanie J.; Meinke, Lance J.; Young, Linda J.

doi:10.1603/0046-225x-29.3.587

Cited by 44 publications

(62 citation statements)

References 33 publications

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“…Also, A. palmeri weed growth can dominate patches of calcareous soil and bloom late in the growing season. Because the WCR is highly attracted to maize or weed pollen and younger plant tissues (Darnell et al 2000;Campbell and Meinke 2006), the phenological contrast between maize and weeds in calcareous soils and surrounding maize can act as a sink for immigrating beetles causing densities to rise in calcareous soil patches later in the season (Wangila 2016). Trap crop situations can lead to greater oviposition and higher larval densities the following season (Hill and Mayo 1974).…”

Section: Discussionmentioning

confidence: 99%

Influence of calcareous soil on Cry3Bb1 expression and efficacy in the field

Wangila

Wang

et al. 2017

Transgenic Res

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Greater than expected injury by western corn rootworm (WCR) (Diabrotica virgifera virgifera LeConte) to Cry3Bb1 expressing maize hybrids (Zea mays L.) has been reported in southwestern Nebraska. Affected areas of some fields are often associated with high pH calcareous soils where maize growth is poor and iron chlorosis is common. As part of a comprehensive study to understand potential causes of unexpected injury, experiments were conducted during 2013 and 2014 to ascertain whether the calcareous soil conditions and associated poor maize growth negatively affect the expression of Cry3Bb1. Quantitative determination of Cry3Bb1 protein expression levels in root tissues was carried out on plants at V5-V6 growth stage using the enzyme-linked immunosorbent assay. Cry3Bb1 and non-Bt near isoline maize hybrids were artificially infested with Cry3Bb1-susceptible WCR eggs to measure survival and efficacy of Cry3Bb1 maize in calcareous and noncalcareous soils. Results showed that there was not a significant difference in expression of Cry3Bb1 protein between plants from calcareous and non-calcareous soils (18.9-21.2 μg/g fresh weight). Western corn rootworm survival was about sevenfold greater from the non-Bt isoline than Cry3Bb1 maize indicating that Cry3Bb1 performed as expected when infested with a Cry3Bb1 susceptible rootworm population. When survival from calcareous and non-calcareous soils was compared, no significant differences were observed in each soil. A significant positive correlation between soil pH and expression of Cry3Bb1 protein in roots was detected from samples collected in 2014 but not in 2013. No such correlation was found between soil pH and survival of WCR. Results suggest that Cry3Bb1 expression levels were sufficient to provide adequate root protection against WCR regardless of soil environment, indicating that lowered Cry3Bb1 expression is not a contributing factor to the greater than expected WCR injury observed in some southwestern Nebraska maize fields.

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Section: Discussionmentioning

confidence: 99%

Influence of calcareous soil on Cry3Bb1 expression and efficacy in the field

Wangila

Wang

et al. 2017

Transgenic Res

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“…The authors wanted to say that the movement of the WCR adults was low during silking. The directional movements of beetles towards pollinating corn and the associated semiochemicals could be inferred from both 1994 and 1995 data analyses (Darnell et al 2000). It was found (Pierce & Gray 2006), that the adult captures increased in soybean plots after the maize developed past the maize R2 stage of development (Ritchie et al 1993).…”

Section: Discussionmentioning

confidence: 99%

Seasonal dispersal of the Western corn rootworm (Diabrotica virgifera virgifera) adults in Bt and non-Bt maize fields

Cagáň¹,

Roşca²

2012

Plant Prot. Sci.

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“…Complete male development requires a minimum temperature threshold of 9.2°C and 403 DD, and female development requires a minimum temperature threshold of 8.2°C and 466 DD. Adult male WCR begin to emerge before females, and the peak (50%) cumulative male emergence also occurs earlier than the peak female cumulative emergence (Darnell et al 2000). Ávila et al (2002) evaluated adult WCR occurrence according to the soil SET measured at a depth of 0.10 m and air temperature measured at 2 m. Similarly, Derron et al (2005) evaluated soil SET at depths of 0.05 and 0.10 m, Ellsbury et al (2005) evaluated soil SET at a 0.10 m depth under a grass stand, and Schaafsma et al (1991) evaluated soil SET at 0.05 and 0.10 m in field conditions, etc.…”

Section: Methodsmentioning

confidence: 97%

Prediction of adult western corn rootworm (Diabrotica virgifera virgifera LeConte) emergence

Středa¹,

Vahala²,

Středová³

2013

Plant Prot. Sci.

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Středa T., Vahala O., Středová H. (2012): Prediction of adult western corn rootworm (Diabrotica virgifera virgifera LeConte) emergence. Plant Protect. Sci., 49: 89-97.The sum of effective temperatures (SET) of adult western corn rootworm (WCR) occurrence was determined based on several criteria. The risk of WCR occurrence was mapped, and the areas of continuous reproduction of WCR in the Czech Republic were identified. The daily soil SET was observed until the initial adult WCR occurrence, and it ranged from 414 degree days (DD) when the lower threshold temperature (LTT) was 12.5°C at 0.02 m depth to 719 DD (LTT of 10°C at a depth of 0.05 m). The daily air SET ranged from 415 DD (LTT 12.5°C at a height of 2 m) to 726 DD (LTT of 10°C at a height of 0.05 m).

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Influence of Corn Phenology on Adult Western Corn Rootworm (Coleoptera: Chrysomelidae) Distribution

Cited by 44 publications

References 33 publications

Influence of calcareous soil on Cry3Bb1 expression and efficacy in the field

Influence of calcareous soil on Cry3Bb1 expression and efficacy in the field

Seasonal dispersal of the Western corn rootworm (Diabrotica virgifera virgifera) adults in Bt and non-Bt maize fields

Prediction of adult western corn rootworm (Diabrotica virgifera virgifera LeConte) emergence

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