The transgenic maize (Zea mays L.) event MON 88017 produces the Bacillus thuringiensis Berliner (Bt) toxin Cry3Bb1 to provide protection from western corn rootworm (Diabrotica virgifera virgifera LeConte) larval feeding. In response to reports of reduced performance of Cry3Bb1-expressing maize at two locations in Illinois, we conducted a two-year experiment at these sites to characterize suspected resistance, as well as to evaluate root injury and adult emergence. Single-plant bioassays were performed on larvae from each population that was suspected to be resistant. Results indicate that these populations had reduced mortality on Cry3Bb1-expressing maize relative to susceptible control populations. No evidence of cross-resistance between Cry3Bb1 and Cry34/35Ab1 was documented for the Cry3Bb1-resistant populations. Field studies were conducted that included treatments with commercially available rootworm Bt hybrids and their corresponding non-Bt near-isolines. When compared with their near-isolines, larval root injury and adult emergence were typically reduced for hybrids expressing Cry34/35Ab1 either alone or in a pyramid. In many instances, larval root injury and adult emergence were not significantly different for hybrids expressing mCry3A or Cry3Bb1 alone when compared with their non-Bt near-isolines. These findings suggest that Cry34/35Ab1-expressing Bt maize may represent a valuable option for maize growers where Cry3Bb1 resistance is either confirmed or suspected. Consistent trends in adult size (head capsule width and dry mass) for individuals recovered from emergence cages were not detected during either year of this experiment. Because of the global importance of transgenic crops for managing insect pests, these results suggest that improved decision-making for insect resistance management is needed to ensure the durability of Bt maize.
机构:
Szecheny Istvan Univ, Albert Kazmer Fac Mosonmagyarovar, Mosonmagyarovar, HungarySzecheny Istvan Univ, Albert Kazmer Fac Mosonmagyarovar, Mosonmagyarovar, Hungary
Voros, Levente
Ledone, Rita Abraham
论文数: 0引用数: 0
h-index: 0
机构:
Szecheny Istvan Univ, Albert Kazmer Fac Mosonmagyarovar, Mosonmagyarovar, HungarySzecheny Istvan Univ, Albert Kazmer Fac Mosonmagyarovar, Mosonmagyarovar, Hungary
机构:
Univ Missouri, Div Plant Sci, Columbia, MO USA
Kansas State Univ, Southwest Res & Extens Ctr, Garden City, NY USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Zukoff, Sarah N.
Ostlie, Kenneth R.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Minnesota, Dept Entomol, St Paul, MN 55108 USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Ostlie, Kenneth R.
Potter, Bruce
论文数: 0引用数: 0
h-index: 0
机构:
Univ Minnesota, Southwest Res & Outreach Ctr, Lamberton, MN USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Potter, Bruce
Meihls, Lisa N.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Missouri, USDA ARS, Columbia, MO USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Meihls, Lisa N.
Zukoff, Anthony L.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Missouri, Div Plant Sci, Columbia, MO USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Zukoff, Anthony L.
French, Lee
论文数: 0引用数: 0
h-index: 0
机构:
French Agr Res Inc, Lamberton, MN USAUniv Missouri, Div Plant Sci, Columbia, MO USA
French, Lee
Ellersieck, Mark R.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Missouri, Coll Agr Food & Nat Resources Stat, Columbia, MO USAUniv Missouri, Div Plant Sci, Columbia, MO USA
Ellersieck, Mark R.
French, B. Wade
论文数: 0引用数: 0
h-index: 0
机构:
USDA ARS, Brookings, SD USAUniv Missouri, Div Plant Sci, Columbia, MO USA
French, B. Wade
Hibbard, Bruce E.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Missouri, USDA ARS, Columbia, MO USAUniv Missouri, Div Plant Sci, Columbia, MO USA