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The area under citrus in India is 1.078 million ha with a production of 11.14 million tonnes and average productivity of 10.3 tones/ha. The traditional mandarin growing areas of Arunachal Pradesh experience humid subtropical climate with high rainfall in monsoon (summer) and low temperature during winter months. Common rootstocks used for budding of mandarin oranges are Trifoliate Orange, Kharna Khatta, C. latipes and C. jambhiri. Long spells and Heavy rainfall, Soil erosion, Lack of desirable planting materials, Lack of application of amendments in acidic soils, Nutrient deficiencies, Lack of proper orchard management, No control of insect pests and diseases, Lack of marketing facilities, Lack of processing and Lack of extension support are the major problems for citrus decline in the state. Strategies like proper site selection, Suitable method of planting, disease free elite planting material, Soil and nutrient management, Proper orchard management, Management of insect-pests and diseases and Extension services can be adopted for rejuvenation of old orchards. A suitable road map covering integrated approaches can be formulated for management of decline orchards.

Key words: Decline orchards, Insect-pests management &Road map.