Patrick Prudent

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Transgenic cotton, Gossypium hirsutum L., producing Cry1Ac and Cry2Ab2 insecticidal proteins from Bacillus thuringiensis (Bt) was first planted in Burkina Faso (West Africa) in 2008. Here, we provide the first baseline data on susceptibility of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) populations collected in West Africa (Benin, Cameroon,(More)
Pyrethroid resistance in Helicoverpa armigera (Hübner) field populations was investigated in Benin over several years by using third- and fourth-instar larval topicalbioassays. H. armigera was resistant to pyrethroids tested as cypermethrin, deltamethrin, bifenthrin, and fenvalerate. Pretreatment with piperonyl butoxide significantly decreased the LD50(More)
A sero-epidemiologic survey about risk of hepatitis was conducted with antibody to hepatitis B core antigen in a large hospital between 1981 and 1984. Among 2363 volunteers for vaccine in health care personnel, 285 were sero-positive (12.0%). Seropositivity increases with age and duration of employment in hospital. It is also associated with occupational(More)
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