title: Effect of repeated applications of buprofezin and acephate on soil cellulases, amylase, and invertase.
abstract: The impact of repeated applications of buprofezin and acephate, at concentrations ranging from 0.25 to 1.0 kg ha(-1), on activities of cellulases, amylase, and invertase in unamended and nitrogen, phosphorous, and potassium (NPK) fertilizer-amended soil planted with cotton was studied. The nontarget effect of selected insecticides, when applied once, twice, or thrice on soil enzyme activities, was dose-dependent; the activities decreased with increasing concentrations of insecticides. However, there was a rapid decline in activities of enzymes after three repeated applications of insecticides in unamended or NPK-amended soil. Our data clearly suggest that insecticides must be applied judiciously in pest management in order to protect the enzymes largely implicated in soil fertility.
authors.affiliation: Universidad Estatal Amazonica, 160150, Puyo, Ecuador, mnraju8875@gmail.com.
authors.forename: M Naga
authors.initials: MN
authors.lastname: Raju
authors.forename: K
authors.initials: K
authors.lastname: Venkateswarlu
mesh_terms: D000681:Amylases / Q000032:analysis*; D044602:Cellulases / Q000032:analysis*; D004784:Environmental Monitoring; D005308:Fertilizers / Q000032:analysis; D007306:Insecticides / Q000032:analysis / Q000633:toxicity*; D009584:Nitrogen / Q000032:analysis; D009946:Organothiophosphorus Compounds / Q000633:toxicity*; D063088:Phosphoramides / Q000633:toxicity*; D010758:Phosphorus / Q000032:analysis; D011188:Potassium; D012987:Soil; D012988:Soil Microbiology; D013829:Thiadiazines / Q000633:toxicity*; D043324:beta-Fructofuranosidase / Q000032:analysis*
chemical_list: D005308:Fertilizers; D007306:Insecticides; D009946:Organothiophosphorus Compounds; D063088:Phosphoramides; D012987:Soil; D013829:Thiadiazines; D010758:Phosphorus; C083997:buprofezin; C001969:acephate; D000681:Amylases; D044602:Cellulases; D043324:beta-Fructofuranosidase; D009584:Nitrogen; D011188:Potassium