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Department of Plant Sciences

UC Davis

Balanced nutrition for preventive management of disease in banana in limited resource situation

Abstract

Due to unbalanced nutrition, the disease incidence and economic loss due to them is increasing in India. Hence the profitability of some horticultural crops is decreasing. Preventive management by balanced nutrition is least understood and curative management using costly fungicides is becoming a problem. Exclusive fungicide oriented disease control has resulted in residues accumulation harmful to consuming public affecting export trade. This has also resulted in new resistant land races of pathogens . It has been established by Graham (1997) in Australia micronutrients like manganese provide resistance to take all “disease in cereals. It is well known that manganese, Boron and Copper are involved in phenol metabolism which results in lignin biosynthesis essential for disease resistance in crop plants. Micronutrient disorders of Zn, Mn, B, Cu and Fe are widespread in India (Anonymous 1995) and correction of these disorders has resulted in resistance to diseases. Panama wilt in Banana, Blossom blight in Mango and die back in citrus are important diseases reducing the yield by 15-25 percent and death of plants if not controlled. Hence study was initiated to identify the important micronutrient disorders and to study the effect of correction in panama wilt management a serious disease of the crop.

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