03468nam a2200421 4500 20260817163659.0 080598 th eng .b10099402 AIT Thesis no. AE-93-25 Mohiuddin, Md. Assessment of the effects of insecticide Basudin (Diazinon) on common carp (Cyprinus carpio) in a rice based agro-ecosystems Bangkok : Asian Institute of Technology, 1993 86 leaves Thesis ; no. AE-93-25 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1993 A short term toxicity test of an organophosphate insecticide, basudin 60EC (diazinon) was carried out on Common carp (Cyprinus carpio) in laboratory condition. The LC50 at 24, 48, 96 hours exposure to diazinon were 4.42, 3.33, and 2,40 ppm respectively. The safe concentration of diazinon was calculated as 0.56 ppm from the short term toxicity test for Cyprinus carpio presumed to be harmless concentrat ion. A long term test was set up in rice field to assess the long term effects of diazinon to Common carp. Diazinon was applied at various concentrations (1.0, 2.0, 4.0, 8.0 ppm), The LC50 in field conditions is much higher than the LC50 value observed in short term toxicity test. The results clearly indicated that the lethal effects of diazinon were insignificant in rice field environment due to the effects of various environmental factors. Water quality was not affected by the insecticide spraying but temperature, suspended solids, solar radiat ions and other environmental factors was likely to influence the toxicity of diazinon. Fish yield was not significantly different between treatments but comparatively the highest yield (481 kg/ha) was in 1.0 ppm treatment associated with survival rate and growth rate. No significant differences in rice yields were observed. Based on the present study, diazinon application rate of 1.0 ppm in rice field conditions may be considered as recommended dose for rice-fish culture system. Pesticides Physiological effect Fishes Effect of pesticides on Phillips, Michael John, Chairperson Edwards, Peter, Examination Committee Little, David C., Examination Committee Government of Britain, Scholarship Donor Asian Institute of Technology. Thesis ; no. AE-93-25 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B17864 .b10099402 mnait x 240411 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003008835 CREATED : 1994-05-16 RECORD # : i1010995x LPATRON : 1018441 LCHKIN : 2006-01-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 4 Barcode : 30050002886272 CREATED : 1994-05-16 RECORD # : i10109961 LPATRON : 1023774 LCHKIN : 2012-01-08 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 7 TOT RENEW : 8 Barcode : 30050120375877 CREATED : 2016-01-06 RECORD # : i1301058x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9426 9426 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no. AE-93-25 30050003008835 2026-08-17 16:36:59 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no. AE-93-25 30050002886272 2026-08-17 16:36:59 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. AE-93-25 30050120375877 2026-08-17 16:36:59 2026-08-17 40