Ecological effects of imidacloprid on arthropod communities in and around a vegetable crop.
To elucidate the ecological impacts of imidacloprid [1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylideneamine] on vegetable crops and their surrounding areas, arthropods on eggplant patches treated with this insecticide were monitored throughout two cultivation seasons, spring and autumn, and the results compared with those of control crops. Residues of imidacloprid in soil accounted for 4-8% of total applied, and concentrations outside the crop were always below 5 micro g/kg. Communities of the crop vegetation experienced significant density reductions, mostly of aphids, and had fewer species diversity during the first month. Those in the surrounding pasture were similarly affected though with less intensity, while non-target ground arthropods both inside and outside the crop only showed significant impacts in the two weeks after planting.
Sánchez-Bayo
Francisco
F
Faculty of Horticulture, Chiba University, Matsudo, Japan. sanchezbayo@mac.com
Yamashita
Hanae
H
Osaka
Ryu
R
Yoneda
Masahiro
M
Goka
Kouichi
K
D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000254:growth & development; D044822:Biodiversity; D017753:Ecosystem; D004784:Environmental Monitoring; D007093:Imidazoles / Q000494:pharmacology*; D007300:Insect Control / Q000379:methods*; D007306:Insecticides / Q000494:pharmacology*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000494:pharmacology*; D010573:Pesticide Residues / Q000032:analysis*; D011156:Population Density; D012621:Seasons; D012989:Soil Pollutants / Q000032:analysis; D032323:Solanum melongena; D013045:Species Specificity; D013997:Time Factors
D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010573:Pesticide Residues; D012989:Soil Pollutants; C082359:imidacloprid