Genetically engineered corn and cotton that produce insecticidal toxins derived from the
bacterium Bacillus thuringiensis (Bt) have been used to manage insect pests in the United …

This chapter reviews knowledge of the role that floral odors play in insect-flower
associations, with special emphasis on empirically obtained evidence; the circumstantial …

▪ Abstract Annual cropping systems consist of a shifting mosaic of habitats that vary through
time in their availability and suitability to insect pests. Agroecosystem instability results from …

The authors review a selection of key references to studies on the disperal and movement of
insect pests that have been published since the review by CG Johnson in 1969. The 3 main …

The taxonomic history of Helicoverpa armigera (Hübner) and Helicoverpa zea (Boddie) is
discussed. Heliothis stombleri Okumura and Bauer is a new synonym of H. zea. The best …

Data have been lacking on the proportion of Helicovera zea larvae that develop on
noncotton host plants that can serve as a refuge from selection pressure for adaptation to …

Recent trends in pest management show an increased shift from insecticidal sprays towards
the use of transgenic crops with insecticidal properties. This shift is partly due to the …

Transgenic varieties of field corn that express the Cry1Ab B. thuringiensis (Bt) toxin in ear
tissue present the potential of reducing ear feeding by the corn earworm, Helicoverpa zea …

Age of insect eggs can have considerable effects on their acceptability and suitability for
parasitoids. In this context, we evaluated the extent to which age of Helicoverpa zea …

A simulation model is developed to examine the role of spatial processes in the evolution of
resistance in Helicoverpa zea populations to Bt corn and Bt cotton. The model is developed …