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University of Agricultural Sciences, Dharwad

The University of Agricultural Sciences, Dharwad was established on October 1, 1986. The University has 5 Colleges, 27 Research Stations, 6 Agriculture Extension Education Centers, 6 Krishi Vigyan Kendras and ATIC. The University has its jurisdiction over 7 districts namely Bagalkot, Belgaum, Bijapur, Dharwad, Gadag, Haveri, and Uttar Kannada in northern Karnataka. Greater diversity exists in soil types, climate, topography cropping and farming situations. The jurisdiction includes dry-farming to heavy rainfall and irrigated area. Important crops of the region include sorghum, cotton, rice, pulses, chilli, sugarcane, groundnut, sunflower, wheat, safflower etc. The region is also known for many horticultural crops. Considerable progress has been registered in the field of education, research and extension from this University.

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  • ThesisItemOpen Access
    STUDIES ON LEAF SPOT AND TWIG BLIGHT OF NEEM (Azadirachta indica A. Juss)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD, 2003) Balachandra, H C; Naik, S T
    "Results of the investigation entitled ""Studie on leaf spot and twig blight of Neem {Azadirachta indica A. Juss) revealed that August and October months were found most favorable for high incidence and severity of leaf spot and twig blight disease. Disease incidence and disease severity index were highest during September-October, 2002 in all the five nurseries compared to January-February, 2003. Shirahatti nursery had highest disease incidence (53.50%), disease severity index (2.61), mortality (55.60%) and Growth loss in collar diameter (50.32%) and height (88.15%) of seedlings. The estimated monetary loss was maximum (Rs 23,450) in Binkadakatte nursery and the rate of disease development was highest in Korlahalli nursery. In vitro studies on fungicides, plant extracts and bioagents indicated that Indofil M-45 @ 0.10, Bavistin @ 0.05, and Bordeaux mixture @ 0.5 per cent were highly effective (with 100% inhibition). Among plant extracts and bio agents tried Stryctinos nux-vomica bark extract (69.40%)and Trichoderma viride (56.95%) inhibited growth to a maximum extent. Under nursery conditions treatment with Bavistin @ 0.05 per cent showed less disease severity and Stryctinos nux-vomica @ 10 per cent. The rate of disease development and per cent increase in disease severity index were least (0.0040 and 12.19%, respectively) in Bavistin treatment @ 0.05 per cent after 150 days. Maximum increase in height and collar diameter was registered in Bavistin @ 0.05 per cent. Disease severity index increased to its maximum when the rainfall was maximum and it had negative and significant effect on collar diameter and height growth of seedlings throughout the experiment. The regression equation fitted showed that for every 1 per cent increase in disease severity index there was 0.80 cm and 1.31 cm decrease in collar diameter and height respectively, in 150 days period. Seedlings from source 2 (Bailhongal) were completely free from leaf spot and twig blight disease."