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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 × Start date: 2023 × Type: Thesis ×
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    ThesisItemOpen Access
    STUDIES ON THE BIO-ECOLOGY OF MEALYBUG, Phenacoccus madeirensis GREEN (HOMOPTERA: PSEUDOCOCCIDAE) WITH SPECIAL REFERENCE TO COTTON
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 42195) LEPAKSHI, N. M; jagadish, k .S
    The female mealybug (P. madeirensis) completed its life cycle on cotton in 48.28 days, while male completed it in 22.40 days. Female nymphs exhibited three instars, without pupal stage, while the males had two instars, with pre-pupal and pupal stages. Nineteen plant species belonging to 12 botanical families were recorded as hosts of the mealybug, majority of them belonged to families Asteraceae (4), Amaranthaceae (3), Apocyanaceae (2) and Euphorbiaceae (2). Seven species of ants (Formicidae) under three subfamilies: Formicinae, Myrmicinae and Dolichoderinae, disseminated early instar nymphs and protected the mealybug from its natural enemies. Eleven species of predators and parasitoids were recorded on P. madeirensis, out of which eight were lady bird beetles (Coccinellidae), one was a green lacewing (Chrysopidae) and one was a gnat (Cecidomyiidae), of which, the encyrtiid parasitoid, Anagyrus amnestos (Rameshkumar, Noyes and Poorani) was most predominant. Duration of life cycle of male and female A. amnestos with honey was 18.66 days in male and 26.81 days in female and without honey, it was 17.12 days for male and 19.37 days for female. Its parasitization was significantly higher in second instar mealybug nymphs (77.00 %) compared to third instar nymphs (53.00 %). Parasitoid emergence was higher in third instar (25.20 %) than in second instar nymphs (20.00 %). Parasitization by A. amnestos on P. madeirensis across locations revealed it to be highest (32.11 %) on Abutilon indicum L. at Bengaluru.
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    ThesisItemOpen Access
    STUDIES ON CHEMICAL ECOLOGY OF THRIPS, Scirtothrips dorsalis Hood (THYSANOPTERA: THRIPIDAE) ON Capsicum annum L.
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 42195) SUBHASH, S; Kamala, Jayanthi P. D
    he chilli thrips, Scirtothrips dorsalis Hood, is an important pest on various commercially important vegetable, ornamental and fruit crops. The objective of our study was to understand its interaction with the host plant, Capsicum annum L. cv. Indra. Headspace samples were collected from different growth stages (pre-flowering, flowering and fruiting) of host plants as well as from healthy and thrips infested (herbivore induced) plant of C. annum and were subjected to olfactometer bioassays, GC-MS and GC-EAD with adult S. dorsalis. A positive behavioural response was observed when adults of S. dorsalis were exposed to fruiting stage volatiles and herbivore induced plant volatiles in olfactometer bioassays. GC-EAD with adult S. dorsalis revealed eight EAD-active compounds from 'fruiting stage host plant volatiles' and six EAD-active fractions from 'herbivore induced host plant volatiles'. The EAD-active fractions from 'fruiting stage' were identified as o-Cymene, 4-methyl-2-undecane, 3,6-Dimethyl decane, ,8-Elemene, n-Dodecane, Dodecyl iodide, 2,3,5-Trimethyl decane and n-Docosane and from herbivore induced host plant volatiles were identified as b-3-Carene, Octadecane, n-Docosane, 4-Methyl-2-undecane, Dodecyl iodide and Tricosane. Synthetic samples of all these compounds were tested individually and were significantly attractive to thrips except n-Dodecane, Dodecyl iodide and Tricosane. Furthermore, synthetic blends with the same concentration and ratio as in the natural headspace samples were also found to be highly attractive (P = 0.002 for fruiting plant volatile & P = 0.003 for herbivore induced plant volatile). In a dual choice test, thrips shows equal preference for the natural samples and the synthetic blends.
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    ThesisItemOpen Access
    INFLUENCE OF ABIOTIC FACTORS ON THE INCIDENCE OF LEAF FOLDER, Cnaphalocrocis medinalis (GUENEE) (LEPIDOPTERA: PYRALIDAE) IN CAUVERY COMMAND AREA AND BIOCHEMICALS ASSOCIATED WITH RESISTANCE IN RICE
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 41100) VANITHA, B K
    of rice n a larval population during the crop growth period varied from 0.00 to 0.81 larvae per hill. The maximum activity of larvae observed during August-September with significant ion with sunshine hours. The per cent leaf damage varied from 0.00 to 18.20 per cent. Maximum leaf damage of 18.20 per cent w relative humidity and significant negative correlation with sunshine hours. Of the 10 showed highly resistant reaction, 21 genotypes reacted as resistant and in and total free amino acids were higher in all susceptible varieties. Higher amount of total -1 recorded lowest larval population and per cent leaf damage, and also, acephate is the best in June, 2012 Department of Entomology (C. T. Ashok Kumar) THESIS ABSTRACT Investigation on the impact of weather parameters, field evaluation genotypes, biochemical basis for resistance and chemical control aspects of rice leaf folder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera:Pyralidae) were conducted in V.C. Farm, Mandya during kharif 2011 and Gandhi Krishi Vignana Kendra, University of Agricultural Sciences, Bangalore. Seasonal incidence of leaf folder i popular variety Tanu revealed that, the negative correlat as recorded during second fortnight of September. Per cent leaf damage exerted a significant positive correlation with morning 0 genotypes screened under field conditions one genotype (NP-218) 78 genotypes showed moderately resistant reaction. None of the genotypes screened are susceptible. Biochemical basis for resistance revealed that the amount of total sugars, crude prote phenol was observed in all the resistant genotypes compared to susceptible varieties. Among the insecticides evaluated for their bioefficacy revealed that acephate 75 SP @ 675 g a.i. ha secticide in getting highest net profit and cost benefit ratio.
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    ThesisItemOpen Access
    ISOLATION, CHARACTERIZATION AND EVALUATION OF DIPTERA (HEXAPODA: INSECTA) SPECIFIC Bacillus thuringiensis Berliner FROM DIFFERENT SOILS
    (University of Agricultural Sciences GKVK, Bangalore, 39884) SMITHA, GEORGE; KUMAR, A R V
    Bacillus thuringiensis Berliner (Bt) based pesticide formulations are being used extensively for the control of insect pests. The genes responsible for the toxin production have been isolated and introduced into the crop plants to protect them from insects. In both the cases, there is chance of development of resistance. New isolates with novel toxin genes are therefore, necessary for solving this type of problem. In the present investigation an attempt was made to isolate some local strains of Bt active against some important dipteran pests. The soil samples were collected from different parts of India, namely, Kerala, Meghalaya and Mizoram. A total of 80 Bacillus isolates were obtained. The microbiological characteristics of these isolates were observed. Most of them have similar morphological appearance and were capable of producing crystalline protein inside the cell. The test insects, Bactrocera cucurbitae (Coquillet) (Diptera: Tephritidae) and Musca domestica L. (Diptera: Muscidae) bred well in the laboratory on artificial diets. Insecticidal effects of 80 isolates were detected. These results showed that some isolated bacteria were highly effective on Ba. cucurbitae and M. domestica. Among the eighty isolates studied using bioassay techniques, eight were found to be toxic to Ba. cucurbitae and seven to M. domestica. Five isolates were found to be common for the two test insects. The toxic isolates were subjected to PCR analysis. Six isolates showed amplification for cry2Aa gene for at least two primer pair combination. Three isolates showed amplification for cry11Aa gene for one primer pair. Cloning and sequencing of the last-step amplicons only can tell exactly the presence of genes. The study in essence demonstrated a great diversity of Bt isolates in the soils from different parts of India, that are active against Diptera. This is the first study from India to identify Bt cultures active against agriculturally important Diptera.
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    ThesisItemOpen Access
    STUDIES ON BIOLOGY OF CASTOR SHOOT AND CAPSULE BORER, Conogethes punctiferalis GUENEE (LEPIDOPTERA : PYRALIDAE) AND ITS MANAGEMENT
    (University of Agricultural Sciences GKVK, Bangalore, 40628) GANESHA; MOHAN I. NAIK
    Influence of weather factors on the larval density revealed that, capsule borer density had a significant negative correlation with maximum temperature of the same fortnight, significant positive correlation with morning and evening relative humidity of one fortnight before and non-significant relationship with any weather parameters of two fortnight before. Hence capsule borer population was less during January to February when there was high temperature range. Studies on the biology of C. punctiferalis revealed that eggs were oval, translucent, with incubation period of 2.66 ± 0.17 days. First, second, third, fourth and fifth instar larval occupied duration of 2.35 ± 0.87, 2.30 ± 0.65, 2.10 ± 0.85, 2.30 ± 0.92 and 2.60 ± 0.59 days, respectively. Pupal period lasted for 10.51 ± 0.85 days. Male and female had longevity of 8.61 ± 0.52 and 9.41 ± 1.97 days, respectively with fecundity ranging from 80-110 eggs per female. The loss in yield due to capsule borer was assessed by protecting the crop with varied level of crop protection after capsule formation. A maximum yield loss (55.66%) was recorded in control over the treatment which was covered with nylon net followed by one spray with chlorpyriphos and two sprays with chlorpyriphos with 36.45 per cent and 15.99 per cent loss, respectively. However, a minimum (8.31 %) yield loss was recorded when the crop was protected on need basis. The newer insecticides were in general, superior over the untreated checks. Chlorpyriphos sprayed at twice resulted in the high reduction in per cent capsule damage. The next to follow was the neem oil, the next best were NSKE and acephate. The highest damage observed in indoxacarb. The maximum cost-benefit ratio (10.84) was registered in chlorpyriphos followed by neem oil with B:C ratio of 9.16, acephate (3.15), profenophos (2.41), NSKE (2.02), imidacloprid (1.26) and spinosad (1.04).
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    ThesisItemOpen Access
    STUDIES ON THE ENDOPHYTIC PROPERTIES OF ENTOMOPATHOGENIC FUNGI, Beauveria bassiana (Balsamo) AGAINST BANANA PSEUDOSTEM WEEVIL, Odoiporous longicollis (Oliv.)
    (University of Agricultural Sciences GKVK, Bangalore, 41124) PRABHAVATHI, M K; THYAGARAJ, N E
    Banana (Musaceae) is an important fruit crop commonly grown in tropical and subtropical parts of the world (Tiwari et al., 2006). It is the fourth most important crop after rice, wheat and maize (INIBAB, 2000; Padmanaban et al., 2001). Out of the 40 million tonnes of fruits produced in India, banana occupies the number one position with an annual output of 14.0 MT 4, 00,000 ha (Osmark, 1974 and Nahif et al., 2003). Musa species is cultivated in a wide range of environments and have varied human uses, ranging from the edible bananas and plantains of the tropics to cold-hardy fibre and ornamental plants. Banana is a staple food of the human diet since the dawn of the recorded history. Banana is high in vitamin B6, which helps fight infection and is essential for the synthesis of iron containing part of haemoglobin. They are also rich in potassium and are a great source of fibre. In recent years, considering the adverse impact of indiscriminate use of chemicals, new trend for organic production of banana is increasing in the country. A new name, i.e. "Green Foods" has been coined. Various insect pests, diseases and nematodes hinder the production of banana. Of them, insect pests play a major role in reducing its yield and quality. More than 180 species of insect pests have been recorded on banana world over (Simmonds, 1966), out of which 30 species infest banana in India (Wadhi and Batri, 1964). Nineteen species infest banana in India ( Padmanaban et al., 2002a). Among the insect pests of banana, the pseudostem weevil Odoiporus longicollis (Olivier) (Coleoptera: Curculionidae) is one of the serious, monophagous pest (Padmanaban and Sathiamoorthy, 2001) limiting the production and productivity of bananas (Visalakshi et al., 1989).
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    ThesisItemOpen Access
    ANTHER CULTURE STUDIES IN RICE (Oryza sativa L.)
    (University of Agricultural Sciences GKVK, Bangalore, 41124) DALPAT, LAL; ASHOK, T H
    Rice (Oryza sativa L., 2n=24), a member of the family Poaceae is the most important cereal food crop in the world and feeds over half of the global population. Anther culture is useful technique in rice breeding programs, as production of haploid plants speeds up the breeding cycle by fixing homozygosity in one generation. The investigation was conducted to standardize culture media for callus induction and regeneration from anther derived callus of Azucena (O. sativa subsp. japonica) and Budda (O. sativa subsp. indica) rice varieties. Anthers from the panicle, with a distance of 11cm and 8 cm length between the subtending leaf and the flag leaf in Azucena and Budda respectively, were selected for the study. At this length, anthers contained uninucleate pollen grains. Before inoculation of the anthers, a cold pretreatment of 50C for 8 days was given to the selected panicles. Callus induction frequency in different media combination ranged from 0.66% to 6.66% was observed in N6 medium supplemented with 1.0 mg l-1 2, 4-D, 2.0 mg l-1 NAA and 0.5 mg l-1 Kinetin. In Azucena variety, highest callus induction (6.66%) while no callusing was found in Budda variety. Highest shoot regeneration (0.33%) from callus was observed in MS medium supplemented with 0.5 mg l-1 BAP, 0.5 mg l-1 Kinetin and 80 mg l-1 adenine sulphate. But all the regenerated shoots were albinos. Root formation was observed in MS medium without any growth regulator.