A study used the opinions of 25 recognized experts in international extension education to identify the in-service training needs of field agents working in training and visit (T&V) systems of extension in developing countries. A pilot-tested nine-item interview schedule was used to interview 25 experts with work and/or consultation experience in international agricultural systems (preferably T&V systems). Inductive data analysis procedures were used to analyze the responses of 20 of the experts contacted. Although the technical component of T&V in-service training was considered fairly successful in transferring technical information to agents, 95% of the experts interviewed rated training in process and delivery skills as deficient. The reported availability of extension trainers and training materials, equipment, and facilities varied by country. Problems were biggest in most countries in sub-Saharan African and Asia. Extension agents' involvement in conducting and planning training sessions was rated minimal at best. Transportation was deemed the most crucial problem facing T&V systems. Role playing and hands-on activities were cited as the most effective teaching methods for in-service training. Eight implications/recommendations regarding T&V inservice training were formulated. Contains 12 references.) (MN)