Professor of Entomology. Scientific Director of Yair R&D. Investigates the interactions between insect vectors and the plant pathogens they transmit, with focus on the whitefly Bemisia tabaci-transmitted viruses in vegetable crops, and plant pathogenic bacteria transmitted by psyllids in vegetable crops and citrus, in Israel and the world. Investigates pest resistance to pesticides, development of new pesticides with the industry. Resistance monitoring and development of Integrated Resistance Management programs based on multi-year resistance monitoring results. Development and use of molecular methods for identification of pests in agriculture .