Effect of ultraviolet-absorbing vinyl film on organophosphorus insecticides dichlorvos and fenitrothion residues in spinach.
Dichlorvos and fenitrothion residues found in spinach grown in greenhouse covered either by regular vinyl film or UV-absorbing vinyl film (UV-A) were analyzed by gas chromatography. After one day, dichlorvos residues in spinach covered with regular vinyl film and UV-A degraded by 97% and 80%, respectively, and degraded 100% after three days covered with regular vinyl film and six days covered with UV-A. After three days, fenitrothion residue in spinach covered with regular vinyl film degraded by 72% and then by 97% after six days; residue in spinach covered with UV-A degraded by 50% after three days and by 95% after six days. These results indicate that UV-A used to prevent the occurrence of insects and fungi in greenhouses reduced the degradation rates of dichlorvos and fenitrothion.
Amano
Shoko
S
Gifu Prefectural Research Institute for Agricultural Sciences, Japan.
Katami
Takeo
T
Shibamoto
Takayuki
T
D000818:Animals; D002849:Chromatography, Gas / Q000379:methods; D004006:Dichlorvos / Q000032:analysis / Q000528:radiation effects; D005278:Fenitrothion / Q000032:analysis / Q000528:radiation effects; D007300:Insect Control / Q000379:methods*; D007306:Insecticides / Q000032:analysis* / Q000528:radiation effects; D010573:Pesticide Residues / Q000032:analysis* / Q000528:radiation effects; D010969:Plastics; D018724:Spinacia oleracea / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays
D007306:Insecticides; D010573:Pesticide Residues; D010969:Plastics; D004006:Dichlorvos; D005278:Fenitrothion