Thumbnail Image

Kerala Agricultural University, Thrissur

The history of agricultural education in Kerala can be traced back to the year 1896 when a scheme was evolved in the erstwhile Travancore State to train a few young men in scientific agriculture at the Demonstration Farm, Karamana, Thiruvananthapuram, presently, the Cropping Systems Research Centre under Kerala Agricultural University. Agriculture was introduced as an optional subject in the middle school classes in the State in 1922 when an Agricultural Middle School was started at Aluva, Ernakulam District. The popularity and usefulness of this school led to the starting of similar institutions at Kottarakkara and Konni in 1928 and 1931 respectively. Agriculture was later introduced as an optional subject for Intermediate Course in 1953. In 1955, the erstwhile Government of Travancore-Cochin started the Agricultural College and Research Institute at Vellayani, Thiruvananthapuram and the College of Veterinary and Animal Sciences at Mannuthy, Thrissur for imparting higher education in agricultural and veterinary sciences, respectively. These institutions were brought under the direct administrative control of the Department of Agriculture and the Department of Animal Husbandry, respectively. With the formation of Kerala State in 1956, these two colleges were affiliated to the University of Kerala. The post-graduate programmes leading to M.Sc. (Ag), M.V.Sc. and Ph.D. degrees were started in 1961, 1962 and 1965 respectively. On the recommendation of the Second National Education Commission (1964-66) headed by Dr. D.S. Kothari, the then Chairman of the University Grants Commission, one Agricultural University in each State was established. The State Agricultural Universities (SAUs) were established in India as an integral part of the National Agricultural Research System to give the much needed impetus to Agriculture Education and Research in the Country. As a result the Kerala Agricultural University (KAU) was established on 24th February 1971 by virtue of the Act 33 of 1971 and started functioning on 1st February 1972. The Kerala Agricultural University is the 15th in the series of the SAUs. In accordance with the provisions of KAU Act of 1971, the Agricultural College and Research Institute at Vellayani, and the College of Veterinary and Animal Sciences, Mannuthy, were brought under the Kerala Agricultural University. In addition, twenty one agricultural and animal husbandry research stations were also transferred to the KAU for taking up research and extension programmes on various crops, animals, birds, etc. During 2011, Kerala Agricultural University was trifurcated into Kerala Veterinary and Animal Sciences University (KVASU), Kerala University of Fisheries and Ocean Studies (KUFOS) and Kerala Agricultural University (KAU). Now the University has seven colleges (four Agriculture, one Agricultural Engineering, one Forestry, one Co-operation Banking & Management), six RARSs, seven KVKs, 15 Research Stations and 16 Research and Extension Units under the faculties of Agriculture, Agricultural Engineering and Forestry. In addition, one Academy on Climate Change Adaptation and one Institute of Agricultural Technology offering M.Sc. (Integrated) Climate Change Adaptation and Diploma in Agricultural Sciences respectively are also functioning in Kerala Agricultural University.

Browse

20191
Reset filters
Subject: Agricultural Entomology × Author: Aura Senson × End date: 2019 × Start date: 2019 × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Insecticide resistance in spiralling whitefly,aleurodicus dispersus russell(hemiptera:aleyrodidae) and its management
    (Department of Agricultural Entomology, College of Agriculture, Vellayani, 2019) Aura Senson; KAU; Ambily Paul
    A study on “Insecticide resistance in spiralling whitefly, Aleurodicus dispersus Russell (Hemiptera: Aleyrodidae) and its management” was done at College of Agriculture, Vellayani and farmer’s field at Kalliyoor during 2018 to 2019. Tokassess thehinsecticide resistance in the fieldhpopulation of spiralling whitefly, A. dispersus and to evaluate the efficacy of new generation insecticides against resistant population of A. dispersus were the objectives of the study. Bioassaykwas carriedLout to assess the insecticideHresistance in field population of A. dispersus collectedUfromHthree different locations (location ISreekaryam, location II-Vellayani and location III-Kalliyoor) based on the intensity of insecticide application. A series of concentrations of three insecticides viz., quinalphos, fenvalerate and imidacloprid were prepared in aqueous solution and leaf dip bioassay was done using the field population of whiteflies collected from three locations. Results revealedDthatkpopulation collected from location-I (Sreekaryam) was foundhto begsusceptible to insecticides with resistance ratio-1 for all three insecticides, which was considered as reference strain. Population collectedgfrom location-II (Vellayani) showed higher resistance with resistance ratio of 2.60, 2.90 and 1.85 and population from location-III (Kalliyoor) was found to be moderately resistant with resistance ratio of 1.14, 1.62 and 1.28 with respect to quinalphos, fenvalerate and imidacloprid respectively. Laboratoryyexperiments were conductedutotevaluateethedefficacy ofdnew generationdinsecticides viz. buprofezin 25% SC @ 75 g.a.i ha-1, clothianidin 50% WDG @ 20 g,a.i ha-1, cynantraniliprole 10.26% OD @ 90 gfa.i ha-1, dinotefuran 20% SG @ 25 g a.i ha-1, flonicamid 50% WG @ 75 g a.i ha-1, thiamethoxam 25%WG @ 50 g a.i ha-1 and thiamethoxamt12.6% + lambdadcyhalothrin 9.5% ZC @ 33+15.75 g a.i ha-1against resistant population of A. dispersus in tomato plants. The results revealed that significantly higher mortality was observed in A. dispersus treated with thiamethoxamg12.6% +hlambda cyhalothrin 9.5% ZC @ 33+15.75 g a.i ha-1 (100%), followed by clothianidin 50% WDG @ 20 g a.i ha-1 (80%) and flonicamid 50% WG @ 75 g a.i ha-1 (66.67%) after 0.75 hours of treatment. Field experiment was conducted by using tomato plants (var. Vellayani Vijay) at Vellayani from where resistant population was collected with three effective insecticides selected from laboratory along with control. No whiteflies were seen in thiamethoxamt12.6% + lambdatcyhalothrin 9.5% ZC @ 33+15.75 g a.i ha-1 treated plants followed by clothianidin 50% WDG @ 20 g a.i ha-1 (9.20) and flonicamid 50% WG @ 75 g a.i ha-1(11.80) after one day of spraying. Studies on the dissipation of residues of effective insecticides viz., thiamethoxam 12.6% + lambda cyhalothrin 9.5% ZC @ 33+15.75 g a.i ha-1, clothianidin 50% WDG @ 20 g a.i ha-1 and flonicamid 50% WG @ 75 g a.i ha-1 were conducted in tomato plants at farmer’s field at Kalliyoor. Tomato fruits collected at 0,1,3,5,7,10,15 and 30 days after application of insecticides at recommended dose and results showed that insecticides dissipated within 10 days with half- lives of 4.05, 3.42, 8.92 and 7.82 days respectively. The risk assessment studies also proved the safety of insecticides for the end users. The present study revealed the development of insecticide resistance in the field population of A. dispersus against fenvalerate and quinalphos. Thiamethoxam 12.6% + lambda cyhalothrin 9.5% ZC @ 33+15.75 g a.i ha-1 followed by clothianidin 50% WDG @ 20 g a.i ha-1 and flonicamid 50% WG @ 75 g a.i ha-1 could be recommended against the resistant population of A. dispersus in tomato. Dissipation and risk assessment studies also supported the result by establishing their safety to consumers. Further studies have to be taken up to develop and popularize Insecticide Resistant Management strategies against A. dispersus by developing Good Agricultural Practices on efficient use of insecticides and to conserve the ecosystem for sustainable pest management.