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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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1996 - 199912000 - 20051
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Subject: Plant Pathology × Author: Devappa, V ×
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    ThesisItemOpen Access
    ASSESSMENT OF YIELD LOSSES DUE TO ROOT – KNOT NEMATODE, Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 ON SUNFLOWER (Helianthus annuus L.) AND ITS MANAGEMENT
    (University of Agricultural Science, Dharwad, 1996) Devappa, V; Krishnappa, K
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    STUDIES ON PIGEONPEA CYST NEMATODE (Heterodera cajani Koshy) INFECTING DIFFERENT PULSES IN NORTHERN KARNATAKA
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD, 2005) Devappa, V; Lingaraju, S
    "Investigations were carried out under glasshouse and field conditions on pigeonpea cyst nematode Heterodera cajani infecting black gram, green gram and cowpea on different aspects concerning host parasite relations and management of the nematode in the above crops. The distribution of H. cajani in northern Kamataka revealed that a high density (> 20 cysts/250 cc of soil) was observed in Humnabad, Bidar Local, Sulepet, Nesargi, Hudli, Kombli (green gram), Janawada, Bo saga, Naganur, Hampasagar (black gram) and Gudas and Examba (cowpea). Heterodera cajani was pathogenic to black gram, green gram and cowpea. Maximum reduction in plant growth parameters was observed at 10000 J2 per plant. Maximum rate of reproduction of cyst and juveniles were recorded in plants inoculated with 100 juveniles per plant. Genotypes, viz., KU-99-4, KU-96-3, OBG-15 and RU-1-9-1 in black gram, TM-98-37, MSS-116, MH-98-1 and UPM-99-3 in green gram and CO-6 in cowpea showed a resistant reaction to H. cajani. Histochemical studies in H. cajani - infected black gram revealed low polysaccharides, nucleic acid and proteins, whereas in green gram very low polysaccharides, nucleic acids and protein concentrations were noticed. Similarly, very low concentration of polysaccharide, protein and nucleic acid was observed in cowpea, whereas healthy plants of all three hosts recorded high intensity of polysaccharides. Neem seed powder (5% w/w), Pseudomonas fluorescens (10 g/kg) and carbosulfan (8 ml/kg) as seed treatments increased the growth parameters, yield and reduced the cysts and juvenile population of H. cajani in green gram, black gram and cowpea. Neem seed powder (5% w/w) as seed treatment increased the plant growth parameters and reduced the number of cysts and juvenile population per 250 cc of soil in black gram, green gram and cowpea under field condition also."