Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
formulated and conducted to assess the relationship between the occurrence & progress of this
disease under prevailing weather variables in the Koshi zone of Bihar.
The impact of weather variables viz., temperature, humidity, and rainfall on the development
of leaf spot disease in makhana in the Koshi Zone of Bihar has taken under investigation, while
the crop season (March-August) 2020 and 2021. The studies revealed that the maximum leaf
spot severity occurred in mid-July, 2020 and 2021, which was 16.75% and 17.67%
respectively. However, it was minimum during April 2020 and 2021. The disease severity
reached its plateau when the respective mean temperature and RH were 32.7 o C & 85.5% in
June-August 2019. Similar trends of the plateau were seen in June-August 2021 when the
respective mean temperature and RH were 35.2 o C & 86.9%. The respective average rainfall
recorded in 2020 and 2021 favoring the maximum severity were 138.5 and 148.0 mm. The
correlation of leaf spot severity with weather variables was strongly positive, which was 0.983
with the mean temperature, 0.965 with the mean relative humidity, and 0.959 with rainfall at a
1% level of significance. Regression analysis also supported the mentioned value of weather
variables as an optimum value responsible for leaf spot disease.
T5-37P-1538
Study the Effect of Different Chemical on Biochemical and Functional
Properties of Custard Apple (Annona squamosa L.) During Storage
Indraraj Ghasil 1 , N. K. Meena 2 , J. K. Balyan 1 and Hitesh Muwal 1
1 Dryland Farming research Station, Arjia, Bhilwara (MPUAT, Udaipur)
2 Department of Fruit Science, Agriculture University, Kota, Rajasthan
Custard apple (Annona squamosa L.) is a delicious fruit cultivated in tropical and sub-tropical
climate. it belongs to family Annonaceae and native of the West Indies. Custard apple is an
arid fruit crop and hardy in nature requires dry climate with mild winter. It can grow from sea
level up to 100 m above the mean sea level elevation and also drought (Singh, 1992). The
ripened fruits are consumed mainly in fresh form. There has been great demand for custard
apple in preparation of ice-cream and pudding. Custard apple contains, protein (1.6 g), fat (0.5-
0.6 g), carbohydrates (23.5g), crude fiber (0.9-6.6 g), calcium (17.6 mg), phosphorus (47 mg),
iron (1.5 mg), thiamine (0.075-0.119 mg), riboflavin (0.086-0.175 mg), ascorbic Acid (15.0 -
44.4 mg), nicotinic Acid (0.5 mg), per 100 g of edible portion of custard apple. Custard apple
is highly climacteric fruit. It ripens within 2-3 days after harvesting at commercial maturity
stage. It steadily produces ethylene in large amount and owing to that the shelf life of fruits is
very poor. At room temperature fruits remain fit for consumption only for 3-4 days after that
decay starts. Its pulp is also containing high amount of phenolics, thereof it become prone to
oxidation during air contact. Post-harvest application of oxalic acid (OA), salicylic acid (SA)
and sodium nitroprusside (SNP) could be a better solution to enhance the quality and storage
Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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