Transgenic corn, Zea mays L., hybrids expressing crystal protein endotoxin genes from Bacillus thuringiensis Berliner are an increasingly popular tactic for managing the European corn borer, Ostrinia nubilalis (Hübner), in North America. O. nubilalis populations also are often vulnerable to the ubiquitous entomopathogenic microsporidium Nosema pyrausta (Paillot). We examined the effect of feedi...

We used a mathematical model with processes reflecting larval mortality resulting from feeding on cross-pollinated ears or Bt ears of corn to analyze the risk of evolution of Cry-toxin resistance in Ostrinia nubilalis (Hübner). In the simulations, evolution of resistance was delayed equally well by both seed mixtures and blocks with the same proportion of refuge. Our results showed that Bt-poll...

Transgenic corn expressing the insecticidal toxin from Bacillus thuringiensis Berliner is gaining support as an effective control technology for use against lepidopteran pests, particularly European corn borer, Ostrinia nubilalis Hübner (Lepidoptera: Crambidae). However, there is concern that widespread adoption of transgenic plants will rapidly lead to B. thuringiensis toxin resistance. Thus, ...

J. Econ.Entomol.79: 1139-1142 (1986) ABSTRACT A Heliothis cone trap captured significantly higher numbers of male European corn borers, Ostrinia nubilalis (Hubner), than a sticky wing trap. Behavioral observations revealed that the difference in number of males captured was related to the proportion of moths approaching the traps that was subsequently captured. Cone traps baited with a 97:3 ble...

The European Corn Borer (ECB), Ostrinia nubilalis (Hübner), is a major corn insect pest. Estimates of damage in the United States due to ECB range between $1-$2 billion per year from yield loss and control costs (Russnogle). A common rule of thumb suggests that one borer per plant can cause a 5% yield loss if the attack occurs during the corn’s critical early development stages (see sidebar). T...

The European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae), is a major pest of corn, Zea mays L., in North America, Europe and Asia. Before the introduction of transgenic Bt corn targeting lepidopteran pests, the European corn borer was responsible for over $1 billion in damage and control measures annually in the U.S. alone (Mason et al. 1996). Management of this insect historically ...

Various larvae of Lepidoptera cause severe damage to maize crops. The dynamics these pests have been studied during all stages plant development. trial was carried out on the Institut National Polytechnique Houphouët-Boigny farm plots in Yamoussoukro (central Cote d’Ivoire). study aims were monitor dynamics, determine importance (frequency and abundance), assess Lepidopteran variety EV8728 SR u...

Earlier population genetic spatial analysis of European corn borer Ostrinia nubilalis (Hübner) indicated no genetic differentiation even between locations separated by 720 km. This result suggests either high dispersal resulting in high gene flow or that populations are not in migration–drift equilibrium subsequent to their invasion of the central U.S.A. in the 1940s. To discriminate among thes...