TY - JOUR
T1 - Buffer zones for reducing pesticide drift to ditches and risks to aquatic organisms
AU - de Snoo, G. R.
AU - de Wit, P. J.
N1 - ISI Document Delivery No.: 125MH Times Cited: 80 Cited Reference Count: 26 de Snoo, GR de Wit, PJ 4th European Conference on Ecotoxicology and Environmental Safety Aug 25-28, 1996 Metz, france de Snoo, geert/M-4315-2013 80 1 38 Academic press inc San diego
<Go to ISI>://WOS:000076241000018
PY - 1998
Y1 - 1998
N2 - Pesticide drift from field sprayers fitted with different types of spray nozzles was investigated under various wind speed conditions. Droplet drift was measured adjacent to the sprayed field, on the ditch bank, and in the ditch. Measurements were carried out in the normal sprayed situation and with an unsprayed buffer zone 3 or 6 m aide. The results indicate that there are major differences between spray nozzles. Drift deposition increases,vith wind speed. In the sprayed situation and with a,wind speed of 0.5 m/s, there was a maximum of 6.0% drift deposition halfway down the ditch bank and no drift deposition in the ditch. At 3 m/s wind speed these figures are 25.1 and 2.2%, respectively. At 5 m/s wind speed, 7.2% drift deposition was measured in the ditch. Risk assessment (cf. SLOOTBOX model) carried out with 17 pesticides used in the study area indicated that at this sind speed, 8 of the 17 pesticides investigated posed a risk to aquatic organisms. Creation of a 3-m buffer zone decreases drift deposition in the ditch by a minimum of 95%, Adjacent to the buffer zone only 4 of the 17 pesticides investigated posed a (minor) risk to aquatic organisms. With a 6-m buffer zone no drift deposition in the ditch could be measured (wind speed maximum, 4.5 m/s). Creating unsprayed crop edges offers good possibilities for the protection of aquatic ecosystems. Socioeconomic research among farmers indicates that buffer zones, such as unsprayed cereal edges and unsprayed grass strips, could well be adopted in agricultural practice. (C) 1998 Academic Press
AB - Pesticide drift from field sprayers fitted with different types of spray nozzles was investigated under various wind speed conditions. Droplet drift was measured adjacent to the sprayed field, on the ditch bank, and in the ditch. Measurements were carried out in the normal sprayed situation and with an unsprayed buffer zone 3 or 6 m aide. The results indicate that there are major differences between spray nozzles. Drift deposition increases,vith wind speed. In the sprayed situation and with a,wind speed of 0.5 m/s, there was a maximum of 6.0% drift deposition halfway down the ditch bank and no drift deposition in the ditch. At 3 m/s wind speed these figures are 25.1 and 2.2%, respectively. At 5 m/s wind speed, 7.2% drift deposition was measured in the ditch. Risk assessment (cf. SLOOTBOX model) carried out with 17 pesticides used in the study area indicated that at this sind speed, 8 of the 17 pesticides investigated posed a risk to aquatic organisms. Creation of a 3-m buffer zone decreases drift deposition in the ditch by a minimum of 95%, Adjacent to the buffer zone only 4 of the 17 pesticides investigated posed a (minor) risk to aquatic organisms. With a 6-m buffer zone no drift deposition in the ditch could be measured (wind speed maximum, 4.5 m/s). Creating unsprayed crop edges offers good possibilities for the protection of aquatic ecosystems. Socioeconomic research among farmers indicates that buffer zones, such as unsprayed cereal edges and unsprayed grass strips, could well be adopted in agricultural practice. (C) 1998 Academic Press
KW - pesticides drift ditches buffer zones risk assessment herbicide spray drift conservation interest larvae insecticides lepidoptera bioassays Environmental Sciences & Ecology Toxicology
U2 - 10.1006/eesa.1998.1678
DO - 10.1006/eesa.1998.1678
M3 - Article
SN - 0147-6513
VL - 41
SP - 112
EP - 118
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
IS - 1
ER -