Diseases and pests of rubber lead to significant crop/tree loss. Early diagnosis and timely adoption of control measures can avoid such losses. This web-based diagnostic system tries to assist the farmers in analysing their field observations systematically to arrive at the correct diagnosis of the disease/pest problem and lead them to the recommendations on the management of these problems. This system also provides facility for direct interaction of the farmer with the experts on the internet. The  observations/photographs on symptoms that are difficult to be diagnosed can be posted on the site to get  prompt diagnostic assistance and recommendations.