▪ Abstract Bacillus thuringiensis (Bt) is a valuable source of insecticidal proteins for use in
conventional sprayable formulations and in transgenic crops, and it is the most promising …

▪ Abstract The development of cotton pest management practices in China has followed a
pattern seen for many crops that rely heavily on insecticides. Helicoverpa armigera …

Evolution of pest resistance reduces the efficacy of insecticidal proteins from Bacillus
thuringiensis (Bt) used in sprays or in transgenic crops. Although several pests have evolved …

Transgenic crops producing Bacillus thuringiensis (Bt) toxins kill some key insect pests, but
evolution of resistance by pests can reduce their efficacy. The predominant strategy for …

Insecticide resistance was an important factor responsible for outbreaks of Helicoverpa
armigera (Hübner) in China in the early 1990s. Bt cotton has been adopted in China since …

Susceptibilities of bollworm, Helicoverpa zea (Boddie) and tobacco budworm, Heliothis
virescens (F.) to Cry1Ac were measured via a diet-incorporated assay with MPV II at the …

The susceptibilities of the major pests of cotton in Australia, Helicoverpa armigera and
Helicoverpa punctigera, to some insecticidal proteins from Bacillus thuringiensis were tested …

Laboratory studies were performed to characterize the lepidopteran toxicity of cotton plants
expressing two different toxin proteins from Bacillus thuringiensis (Bt), in order to assess …

Due to increasing problems occurring from massive applications of pesticides, such as
insect resistance to pesticides, the use of biotechnological tools to minimize losses from …

Transgenic crops producing Bacillus thuringiensis (Bt) toxins kill some major insect pests,
but pests can evolve resistance and thereby reduce the effectiveness of such Bt crops. The …