A large percentage of Bollgard cotton is treated for bollworms [Helicoverpa zea (Boddie)] with little information about economic losses from these infestations. The impact of bollworm infestations on maturity and yield of Bollgard cotton was determined. Infestations of 1-d-old bollworm larvae were established on non-Bollgard and Bollgard cottons in large field cages. Treatments included three a...

Laboratory experiments were conducted to evaluate the behavior of bollworm, Helicoverpa zea (Boddie), and tobacco budworm, Heliothis virescens (F.), larvae on meridic diet with different concentrations of the Cry1Ac and Cry2Ab proteins from Bacillus thuringiensis subsp. kurstaki Berliner. The proteins used in these experiments are the ones in commercially available Bollgard and Bollgard II cott...

1) Moth Trapping. Despite the use of Bt-transgenic cotton on over 98% of the acreage in Tennessee, bollworm and tobacco budworm still compose an important pest complex. Bollworms may cause significant economic damage to Bt cotton fields, and the bollworm/budworm can be even more damaging to non-Bt cotton. More importantly, the threat of tobacco budworm infestations results in high adoption of B...

the adoption of integrated pest management (ipm) strategy by farmers of bathinda cotton belt of punjab, india resulted in reduction of insecticidal applications. there was 3-4 times reduction in insecticidal applications in ipm villages (4.86-5.33) over the non-ipm villages (15.16-18.12). a general trend of reduced insecticidal applications of both conventional as well as new insecticides, in i...

Field experiments were conducted during 2019 and 2020 seasons in Sakh Agricultural Station Farm, Kafr El-Sheikh Governorate, to evaluate the sequences of certain insecticide six groups biocide on cotton bollworms, associated predators fields yield. Sequence  Ictafos (chlorpyrifos) organic phosphorus – Topron (chlorofluoezuron) insect growth inhibitor Cyperco (cypermethrin) pyrethroids resulted ...

Bollworms management remains one of the major constraints to higher cotton productivity in Zimbabwe. Field trials investigate efficacy Spinosad 48 SC on Diparopsis castanea (Hubner) and Herlicoverpa amigera (Hampson) were carried out for three seasons 2010/11 2013/14 at Cotton Research Institute, Kuwirirana, Umguza, Chizvirizvi A Randomised Complete Block Design with five treatments four replic...