• Publications
  • Influence
Insect resistance to Bt crops: lessons from the first billion acres
Field outcomes support theoretical predictions that factors delaying resistance include recessive inheritance of resistance, low initial frequency of resistance alleles, abundant refuges of non-Bt host plants and two-toxin Bt crops deployed separately from one-t toxin BT crops.
Ecological specialization of the aphid Aphis gossypii Glover on cultivated host plants
Both genetic and experimental data suggested that plants of the genus Hibiscus may be used as refuge for the specialized clones of A. gossypii, suggesting the existence of host‐associated trade‐offs.
Potential shortfall of pyramided transgenic cotton for insect resistance management
Analysis of results from 21 selection experiments with eight species of lepidopteran pests indicates that some cross-resistance typically occurs between Cry1A and Cry2A toxins, and incorporation of empirical data into simulation models shows that the observed deviations from ideal conditions could greatly reduce the benefits of the pyramid strategy.
Insecticide resistance in field populations of Bemisia tabaci (Hemiptera: Aleyrodidae) in West Africa.
The resistance of B. tabaci to pyrethroids and OPs is certainly due to their systematic use in cotton treatments for more than 30 years, and resistance to neonicotinoids could be due to the presence of an invasive B.tabaci biotype recently detected in the region.
Tuta absoluta Meyrick (Lepidoptera: Gelechiidae): A New Threat to Tomato Production in Sub-Saharan Africa
The implementation of effective and ecologically-sound integrated pest management (IPM) strategies is needed to develop sustainable vegetable production.
Relationships between temperature, development and survival of different life stages of the tomato fruit fly, Neoceratitis cyanescens
The development and survival of female Neoceratitis cyanescens (Bezzi) from egg to complete ovarian maturation were studied in the laboratory at five different constant temperatures to understand temporal and geographical patterns of fruit fly occurrence.
Occurrence, biology, natural enemies and management of Tuta absoluta in Africa
The South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is a devastating invasive pest of tomato crops in several areas around the world including Africa. Here, we
Dynamics of insecticide resistance in the malaria vector Anopheles gambiae s.l. from an area of extensive cotton cultivation in Northern Cameroon
Objective  To explore temporal variation in insecticide susceptibility of Anopheles gambiae s.l. populations to the four chemical groups of insecticides used in public health and agriculture, in