نبذة مختصرة : This study investigated the nutritional changes and the effects of pests on the quality and development of Bael (Aegle marmelos Correa.). It has been found in the present study that there was a numbers of biochemical changes occurred during fruit development. Even, pest incidence in tender fruits on external surface and their subsequent infestation are also noted which resulted in economic loss in crop production system. The objectives of this study were to quantify different neutraceuticals compounds, their origin and pest incidence in hard fruits like bael. Results revealed that fruit weight, fruit volume, fruit length and fruit diameter, seed weight and rind weight gradually increased from fruit set to maturity. Total soluble solid contents (26.00B) and total sugars (14.07 %) were Maximum at maturity. Carbohydrates and carotene contents gradually increased up to November. Due to development in mucilage (carotene dilution) and other soluble solids carbohydrates slightly decreased in November after that it was gradually increased at harvest time. These neutraceuticals reflected double sigmoid growth curve in bael. There was no carotene development in first two months of fruit growth and its development follows the trend as that of carbohydrates. Marmalosin (850 mg/100g pulp) and even poly-phenol (4.03 g/100g pulp) content were found at the maximum in 90 days and showed resistance against pest injury and stress. The protein content of bael was gradually increased (0-4.713%) up to December after which it decreased to a considerable level (2.66%) at maturity. The pest incidence severity of bael fruit borer(Cryptophlebiaombrodelta) was 3 (6-10%) and with moisture and nutrient stress the total 40% damage was noticed under rain-fed ecosystem of Jharkhand, (Eastern) India.
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