Bihar Agricultural University, Sabour established on 5th August, 2010 is a basic and strategic institution supporting more than 500 researchers and educationist towards imparting education at graduate and post graduate level, conducting basic, strategic, applied and adaptive research activities, ensuring effective transfer of technologies and capacity building of farmers and extension personnel. The university has 6 colleges (5 Agriculture and 1 Horticulture) and 12 research stations spread in 3 agro-ecological zones of Bihar. The University also has 21 KVKS established in 20 of the 25 districts falling under the jurisdiction of the University. The degree programmes of the university and its colleges have been accredited by ICAR in 2015-16. The university is also an ISO 9000:2008 certified organisation with International standard operating protocols for maintaining highest standards in teaching, research, extension and training.VisionThe Bihar Agricultural University was established with the objective of improving quality of life of people of state especially famers constituting more than two third of the population. Having set ultimate goal of benefitting society at large, the university intends to achieve it by imparting word-class need based agricultural education, research, extension and public service.
(Department of Entomology, BAU, Sabour, 2017-07) Kunal, Gautam; Anil
The investigations on insect pests of linseed and management of D. lini were conducted at Experimental Farm, Bihar Agricultural University, Sabour during Rabi season of 2016-17. A total of nine insect pests (D. lini, Thrips palmi Karny, Frankliniella schultzei (Trybom), Agrotis ipsilon Hufnage, Helicoverpa armigera Hübner, Spilosoma obliqua Walker, Monolepta signata Olovier, unidentified aphids and wire worm) and four natural enemies (Coccinella septumpunctata L., Menochilus sexmaculatus (Fabricius), Oxyopes sp. and Paederus sp. were found to be associated with linseed. The highest population of A. ipsilon (1.00 larva/m2) and thrips (26.60 nymphs & adults/plant) were observed during 52nd and 9th SMWs, respectively. However, the highest population of aphids (2.40 aphids/plant), Helicoverpa (1.00 larvae/m2), Oxyopes (1.00 spider/plant) and coccinellids (1.0 coccinellid/plant) were observed during 8th SMW. Similarly, the maximum fresh bud fly infestation (6.12%) was also recorded during the 8th SMW. Minimum temperature had positive correlation (P=0.01) with the population of A. ipsilon, H. armigera and cumulative bud fly infestation, whereas maximum temperature showed positive correlation (P=0.01) with cumulative bud fly infestation. Minimum relative humidity and population of A. ipsilon were found to be positively correlated (P=0.01), whereas maximum relative humidity had negative correlation (P=0.01) with H. armigera and cumulative bud fly infestation. Out of 101genotypes screened for resistance against the infestation of D. lini, 12 genotypes were categorized as resistant, 65 as moderately resistant, 17 as moderately susceptible, 05 as susceptible and 02 as highly susceptible. The field trial on different dates of sowing revealed that the infestation of D. lini increased and yield decreased in all five tested varieties in
progressive manner with delay in date of sowing. The lowest mean bud fly infestation (13.39%) and highest mean yield (1385.30 kg ha-1) was obtained with the crop sown on 08.11.2016, whereas the highest mean bud fly infestation (37.46%) and lowest mean yield (177.75 kg ha-1) was obtained with crop sown on 08.01.2017. The application of insecticides showed significant reduction in bud fly infestation and increased yield over untreated check. The minimum bud fly infestation (8.25%) was recorded with the application of fenvalerate 20 EC being at par with imidacloprid 17.8 SL (8.57%) followed by spinosad 45 SC (9.87%) at 15 days after second spray. Among the insecticides/bio-pesticides, the maximum infestation (16.26%) was recorded with neem leaf extract followed by fipronil 5 SC (12.31%) and dimethoate 30 EC (10.87%). The maximum incremental yield (5.21 q ha-1) was obtained with fenvalerate followed by imidacloprid (4.54 q ha-1) and spinosad (3.29 q ha-1). However, the minimum incremental yield (0.39 q ha-1) was obtained with neem leaf extract followed by fipronil (2.05 q ha-1) and dimethoate (3.06 q ha-1). The maximum benefit-cost ratio (15.12:1) was obtained with fenvalerate followed by imidacloprid (11.47:1) and dimethoate (5.92:1). However, minimum benefit-cost ratio (0.30:1) was obtained with neem leaf extract followed by fipronil (1.42:1) and spinosad (1.86:1).