Dr Hanna has 30 years of extensive research experience – 12 with the University of California, Davis and 18 with the International Institute of Tropical Agriculture in sub-Saharan Africa - in arthropod biodiversity, arthropod-host plant interactions in natural and agricultural systems, vector biology, biological control, crop agronomy, crop utilisation, and risk assessment and adaptation to climate change. He is one of IITA's scientists promoting sustainable agricultural intensification as key element in emission reduction and forest conservation.
He has conducted field research throughout tropical Africa – much of it on cassava development and integrated pest management - and has participated in numerous training programs on the identification, biology and management of numerous crops pests and diseases. He works on cassava, plantains, maize, yams and vegetables.
In his career at IITA since 1998, Dr Hanna has mentored 48 graduate students - 25 PhD and 23 MSc - and 17 undergraduates, of whom 49 were Africans and 16 were women. He has extensive experience in scientific publishing with 116 peer-reviewed journal articles and over 100 proceedings and miscellaneous articles. He can be contacted at his email email@example.com; by telephone +237 22 223 7434; or by post at BP 2008 (Messa), Yaoundé, Cameroon.