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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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Subject: Entomology × End date: 2017 × Start date: 2017 × Type: Thesis ×
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    ThesisItemOpen Access
    EFFECT OF DIFFERENT SOURCES OF SOIL NUTRIENT APPLICATIONS ON SOIL FAUNA IN SUNFLOWER ECOSYSTEM
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-11-02) SHIVAPPA, AGADI; Kumar, N. G.
    The investigation on the effect of different sources of soil nutrient applications on soil fauna in sunflower ecosystem was carried out at the ZARS, University of Agricultural Sciences, GKVK, Bangalore, during 2016-17. Soil application of 15 t of FYM/ha + introduced consortia of soil fauna treatment documented significantly higher abundance of total mesofauna (15.08), Collembola (2.45),cryptostigmatids (3.12),other Acari (7.25) and total Acari (10.54) compared to rest of treatments during cropping season. The highest population of total soil mesofauna was noticed 90 (16.50) days after sowing. The same treatment recorded significantly higher available nitrogen (311 kg/ ha), available phosphorus (122 kg/ha), available potassium (235 kg/ha), exchangeable calcium (6.83 meq/100 g) and soil microbial biomass C (3852.05 μg/g soil) at 45 days after sowing. STCR integrated practices with introduced consortia of soil fauna treatment recorded higher grain yield (28.55 q/ha) compared to recommended package of practices alone (17.81 q/ha). Soil mesofauna was positively related with all chemical and microbial parameters. These showed 31.8 % of impact on the soil mesofaunal activity. Soil moisture and atmospheric maximum temperature showed significantly positive and negative relationship with the abundance of soil mesofauna respectively. These factors together with rainfall exhibited significant influence on the abundance of mesofauna (89.2%).
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    ThesisItemOpen Access
    STUDIES ON INSECT PESTS OF GRAIN AMARANTH (Amaranthus sp.) AND THEIR MANAGEMENT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-09-26) ANIL; Srinivas Reddy, K. M.
    The present investigation revealed nineteen insect pests on grain amaranth, namely leaf webber (Hymenia recurvalis Fab.), stem weevil (Hypolixus truncatulus Fab.), ear head caterpillar (Helicoverpa armigera Hubn.), leaf beetle (Gametis versicolor Fab.), Yellow winged grasshopper (Gastrimargus species Fab.), Brown stripped beetle (Clinteria kluge Hope.), amaranth bug (Cletus species Fab.), horned coreid bug (Cletomorpha sp Fab.), wingless grasshopper (Neorthacris acuticeps Bol.), ash weevil (Myllocerus discolor Boh.), (Myllocerus dorsatus Fab.), white spotted flea beetle (Monolepta signata Oliv.), seed bug (Spilostetchus hospes Fab.), (Graptostetchus servus Fab.), (Nysius species Dall.), mirid bug (Eurystylus sp. Stal.), Stink bug (Hyalomorpha picus Fab.) and other insect pests. The major natural enemies recorded were coccinellids, black bug, assassin bug and braconid wasp. Thirty two grain amaranth genotypes were screened for leaf webber, of which KBGA-5, RHGA-13-1, RHGA-13-2, RMA-7, MGA- 15, KBGA-4, BGA-38, BGA-43, SKGPA-75, RJAS-08-17, MGA-12, KBGA-7, IC- 032193 and IC-035713 were found tolerant. KBGA-9, BGA-7-1, BGA-29, SKKGPA-86, RHGA-11, BGA-2 and SKGPA-74 were moderately tolerant to leaf webber. Among the insecticides evaluated, emamectin benzoate 5% SG @ 0.25 g/l and indoxacarb 15.8% EC @ 0.5 ml/l were found to be more superior against leaf webber and acephate 75 SP @ 1.5 g/l and imidacloprid 17.8 SL @ 0.3 ml/l superior against coreid bug over other treatment respectively. The maximum grain yield (13.98 q/ha) with IBCR (Incremental Benefit Cost Ratio) of 26.00 was evident from the plots treated with imidacloprid 17.8 SL, followed by profenophos 50 EC with seed yield of 13.59 q/ha with IBCR Rs. 29.40.
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    ThesisItemOpen Access
    STUDIES ON FLOWER VISITORS AND THEIR FORAGING ACTIVITY ON SUNFLOWER (Helianthus annuus L.) AND NIGER (Guizotia abyssinica Cass.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-08-11) MANISHA; KHADER KHAN, H.
    Abundance and diversity of pollinators was recorded in sunflower – niger cropping systems. Eleven and thirteen species of pollinators were observed in sunflower and niger respectively. The diversity of pollinators was similar both in sunflower and niger (0.22 each). In intercropping system at different ratio of sunflower and niger, diversity was maximum in 8:4 ( 0.22 ) and 5:5 (0.22). In sunflower the major pollinators were Apis dorsata (38.09%) followed by A.cerana (29.52%) and A.florea (21.58% ). In niger A.dorsata, A.cerana and A.florea constituted about 27.23%, 22.15% and 41.46% respectively. In intercropping system A. dorsata (60.72 bees) was more in 5:5 ratio on sunflower and A.florea (58.34 bees) in 6:4 on niger. Maximum activity of A. dorsata (6.63 and 6.67 bees) was observed at 9.00AM; A. cerana (6 and 5.33 bees) at 10.00AM and A. florea (3.00 and 9.33 bees) at 11.00AM in sunflower and niger respectively. Number of marked bees recaptured after releasing were more in niger (4.6 bees) compared to sunflower (3.7 bees). Intercrop movement of bees was more from sunflower to niger (0.5 bees) as compared to movement from niger to sunflower (0.3 bees). The number of filled seeds (1195), total number of seeds (1354), test weight (4.39g), volume weight (59.75g), kernel weight (4.54g), germination percent (100%), oil content (42.11%) was more in 6:4 ratio on sunflower. Number of filled seeds (21.66), total number of seeds (26.20) and volume weight (32.38g) more in 6:4 in niger.
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    ThesisItemOpen Access
    VARIATION IN THE POPULATION AGE STRUCTURE AND ITS INFLUENCE ON THE ADULT ACTIVITY IN Corcyra cephalonica (STAINTON) (LEPIDOPTERA: PYRALIDAE)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-08-08) SOWJANYA, K. C.; Thippaiah, M.
    During the present investigation, intra-generation accumulation of variation in age-structure and effect of accumulated variation on adult emergence and activity pattern in Corcyra cephalonica was studied. Variation in developmental period at different stages of Corcyra was studied using same day laid eggs. At the egg stage 5 days of variation in developmental period was noticed. Considerable variation (head capsule width) among the individuals was also noticed during the larval stage. Head capsule width was measured at every four days. Accumulated variation in head capsule width increased from 0.0009 during first sampling to 0.029 at last sampling. However, coefficient of variation was almost same throughout the larval period. Moths started emerging on 52nd day of egg inoculation. Male moth emerged first (52nd day) followed by females on 54th day, suggesting occurrence of protandry in C. cephalonica. Moth emergence continued upto 113th day of egg inoculation. In entire population 68.9% females were mated and 31.1% remained unmated. Among the mated females, 76.35 % had mated once, 16.67 % mated twice, 5.18% was mated thrice, 0.45% mated four times and 1.35% mated five times. Males completed their developmental period earlier to females, though number instars remained same among them (7 to 8 instars). Average total developmental period was 45.3 ± 2.5 in males and 48.9 ± 3.3 days in females, suggesting gender associated difference in developmental period.
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    ThesisItemOpen Access
    TEMPORAL DIVERSITY OF PARASITOIDS IN RAGI, PADDY AND SUGARCANE ECOSYSTEMS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-07-26) ABHISHEK, M. S.; Jayappa, A. H.
    A study was conducted from March, 2016 to February, 2017 at the College of Agriculture, V. C. Farm, Mandya, Karnataka to determine the parasitoid faunal complex, their abundance and temporal diversity in ragi, paddy and sugarcane ecosystems. Twenty yellow pan traps per crop were laid at fortnightly intervals. Of the 24,586 parasitoid specimens collected from the three agroecosystems, 7725 were from ragi, 8248 were from paddy and 8613 were from sugarcane. Eighteen parasitoid families occurred in ragi and paddy fields while 19 families occurred in the sugarcane field. The parasitoid families collected were Trichogrammatidae, Mymaridae, Encyrtidae, Aphelinidae, Eulophidae, Chalcididae, Eurytomide, Eupelmidae, Torymidae, Ichneumonidae, Braconidae, Scelionidae, Platygastridae, Ceraphronidae, Megaspilidae, Evaniidae, Cynipidae and Diapriidae. All families collected occurred in all three ecosystems with the exception of Perilampidae, which occurred only in the sugarcane ecosystem. Scelionidae was most abundant and richest in genera (33) in all three ecosystems, followed by Encyrtidae (30), Trichogrammatidae (25), Mymaridae (14), Aphelinidae (10) and Platygastridae (8). Of the two-functional groups of parasitoids, viz., egg and other (larval, pupal and adult) parasitoids, the egg parasitoids were more abundant in all the three ecosystems. Parasitoid abundance correlated significantly with rainfall in the paddy ecosystem; no such correlation was found in the other two (ragi and sugarcane) ecosystems. Temperature did not correlate significantly with parasitoid abundance in all three ecosystems. Parasitoid diversity (Shannon-Wiener, Simpson and Margalef’s) was higher in monsoon and winter than in other seasons but it didn’t differ significantly between the three ecossytems.