Temporal and intra-plant variability of cry1Ac expressing in Bt-cotton and its influence on the survival of cotton bollworm
, Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera).
Mokhtar Jalali-Javaran, a member of the Biosafety Council, told the daily the seeds had been modified in Iranian laboratories to be pest resistant--mainly resistant to the cotton bollworm
, which has often afflicted Iran's cotton crops.
And if it's damaging cotton, it's called the cotton bollworm
. Smaller than the hornworm, the tomato fruit worm is 2 inches long or less.
It is noteworthy that pest pressure of the African cotton bollworm
is not mentioned as a key challenge yet, Bt cotton has been developed with public resources targeting this pest.
The pest pressure of the African cotton bollworm
is not mentioned as a key challenge because Bt cotton has been developed targeting this pest.
), one of the most serious agricultural pests affecting a wide range of crops, including soybeans, corn, cotton, tomatoes, sweet corn, and sorghum.
Helicoverpa armigera (Lepidoptera: Noctuidae) had been regarded as the most vicious of the insect pests attacking on cotton crop in Pakistan during 1990s and early2000s.
"Simultaneously, the quantity of insecticides used to control cotton bollworm
reduced by 96% from over 5,700 metric tons to as low as 222 metric tons of active ingredient in 2011."
The Old World cotton bollworm
, Helicoverpa armigera Hubner (Lepidoptera: Noctuidae), is one of the most important pests in the world, and is widely distributed, being present in Europe, Asia, Africa, and Oceania (Zalucki et al.
Pending regulatory approvals, these varieties are expected to be launched in 2012 and will offer cotton growers protection against cotton pests such as cotton bollworm
, tobacco budworm and armyworms.
In the other study, Xiao-Ya Chen and his colleagues at the Chinese Academy of Sciences in Shanghai used a similar trick to increase the cotton bollworm
's sensitivity to gossypol, a defense chemical produced by the cotton plant.
However, there are associated adverse impacts on parasitic natural enemies of cotton bollworm
. Consequently, the populations of parasitic natural enemies in Bt cotton fields are significantly reduced.