Shashi Bhushan V.,AINP on Pesticide Residues
Pestology | Year: 2013
Efficacy of certain newer molecules was evaluated against important pests of lucerne viz., pea aphid, (Acyrthosiphon pisum Harris), spotted alfalfa aphid, (Therioaphis trifolli F.) and alfalfa blotch leafminer, (Agromyza frontella) during Rabi 2011-12 at students' farm, College of Agriculture, Rajendranagar of which spiroteramat at 120 g a.i./ha, thiacloprid at 120 g a.i./ha and imidacloprid at 200 g a.i./ha were effective in overall population reduction of 88.21, 83.85 and 82.59 per cent of pea aphid, 90.70, 86.66 and 84.27 per cent of spotted alfalfa aphid and 79.45, 74.49 and 74.44 per cent of alfalfa blotch leaf miner, respectively whereas dimethoate at 300 g a.i./ha and bifenthrin at 80 g a.i./ha recorded significantly lesser population reduction of all the three pests. Quinalphos at 350 g a.i./ha was the least effective of all the insecticidal treatments in controlling the population of pea aphid, (67.29%), spotted alfalfa aphid (67.09%) and alfalfa blotch leafminer (53.70%) over control.
Banerjee H.,AINP on Pesticide Residue Laboratory |
Ganguly P.,AINP on Pesticide Residue Laboratory |
Roy S.,AINP on Pesticide Residue Laboratory |
Banerjee D.,AINP on Pesticide Residue Laboratory |
And 3 more authors.
Environmental Monitoring and Assessment | Year: 2010
A supervised field trial was conducted on tea with propineb at 1,750 and 3,500 g a.i./ha at two locations (Assam and Darjeeling), applied thrice at an interval of 10 days during the year 2006-2007. Propineb residue was measured spectrophotometrically at 435 nm in terms of CS2. The initial deposit of propineb in green tea leaves were found to be in the range of 16.26-35.96 mg/kg and the residue persisted up to 10 days irrespective of doses and locations with half-life value ranging from 2.24 to 2.43 days and preharvest interval of 17.17-21.37 days. Made tea residues ranged from 9.27 to 20.86 mg kg-1 on 7 days and no residues could be detected on 14 days. Infusion study indicated that propineb did not infuse into tea liquor from made tea. The limit of determination was found to be 0.1 mg kg-1 in terms of propineb for green tea leaves, made tea, and tea liquor. The tea applied with the recommended dose of propineb is safe for consumption as liquor. © 2009 Springer Science+Business Media B.V.
Shimoge D.,AINP on Pesticide Residues |
Vemuri S.,AINP on Pesticide Residues
Pestology | Year: 2013
Efficacy of six insecticides viz., bifenthrin 10 EC at 80 g a.i. ha -1, fipronil 5 SC at 500 g a.i. ha-1, flubendiamide 480 SC at 60 g a.i. ha-1, quinalphos 25 EC at 350 g a.i. ha-1, profenofos 50 EC at 400 g a.i. ha-1 and beta-cyfluthrin 25 SC at 18.75 g a.i. ha-1 was evaluated during Kharif, 2012 against shoot and fruit borer (Earias vittella Fabricius) on okra of which flubendiamide @ 60 g a.i./ha, profenofos @ 400 g a.i./ha and beta-cyfluthrin @ 18 g a.i./ha, applied twice as foliar sprays were most effective.
Vemuri S.B.,AINP on Pesticide Residues |
Rao C.S.,AINP on Pesticide Residues |
Harinatha Reddy A.,AINP on Pesticide Residues |
Swarupa S.,AINP on Pesticide Residues
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014
Experiments were conducted during kharif, 2013 to evaluate the efficacy of six insecticides viz., bifenthrin 10 EC at 80 g a.i. ha-1, fipronil 5 SC at 500 g a.i. ha-1, flubendiamide 480 SC at 60 g a.i. ha-1, quinalphos 25 EC at 350 g a.i. ha-1, profenofos 50 EC at 400 g a.i. ha-1 and beta-cyfluthrin 25 SC at 18.75 g a.i. ha-1 against white fly Bemisia tabaci (Gennadius) on okra of which flubendiamide @ 60 g a.i./ha, profenofos @ 400 g a.i./ha and beta-cyfluthrin @ 18 g a.i./ha, applied twice as foliar sprays were found to be most effective in controlling the okra pests, hence the dissipation studies were conducted for these three insecticides. The dissipation pattern was studied by collecting okra fruits at 0, 1, 3, 5, 7, 10 and 15 days after last spray and analyzed at AINP on Pesticide Residues, Rajendranagar, Hyderabad The initial deposits of flubendiamide at 60 g a.i. ha-1 sprayed at 50 % flowering and repeated 15 days after first spray recorded 1.49, mg kg-1 which dissipated to below detectable level (BDL) on 10th day. The initial deposit of profenofos (400 g a.i./ha) in okra fruits was 1.52 mg/kg which degraded to 0.09 by 7th day after last spraying. The initial deposit of beta-cyfluthrin (18.75 g a.i./ha) in okra fruits was 0.11 mg/kg and by one day after treatment dissipated by 45.04 per cent.