PMID- 17099930
OWN - NLM
STAT- MEDLINE
DCOM- 20070323
LR  - 20151119
IS  - 1526-498X (Print)
IS  - 1526-498X (Linking)
VI  - 62
IP  - 12
DP  - 2006 Dec
TI  - Exposure risk assessment and evaluation of the best management practice for 
      controlling pesticide runoff from paddy fields. Part 1: Paddy watershed 
      monitoring.
PG  - 1193-206
AB  - Rice pesticide concentrations in surface water along with hydrological balance 
      and water management conditions were investigated in a paddy watershed of about 
      100 ha at the Sakura river basin in Tsukuba, Japan, for 3 years from April 2002. 
      Monitoring on different hydrological scales ranging from a paddy plot up to a 
      watershed determined the importance of water management associated with rainfall 
      events and the cyclic irrigation for reducing pesticide discharge into aquatic 
      environments. Surface drainage significantly increased as a response to rainfall 
      events greater than about 1.5 cm day(-1). A total of 16 herbicides were detected 
      in the stream water and their peak concentrations mostly occurred from early to 
      mid-May following the pesticide application period. Two water management factors 
      influencing the pesticide runoff from paddy fields were defined: excess water 
      storage capacity (EWSC) and water holding period (WHP). Uncertainty analyses of 
      pesticide discharge from a paddy plot for dymron (daimuron) and imazosulfuron 
      (IMS) were performed using Monte Carlo simulation (MCS) with prescribed 
      probability of rainfall and water management practice from observations over a 
      period of 3 years. Application of an intermittent irrigation scheme with shallow 
      water depth practice and high drainage gate to maintain the EWSC > 2 cm and 
      increasing WHP from the current Japanese Agricultural Chemicals Regulation law of 
      3-4 days to at least 10 days were recommended for reducing the pesticide runoff 
      from paddy fields in a monsoon region such as in Japan. The combination of good 
      water management in field plots and small-scale water cycling is the best 
      management practice for controlling pesticide discharge from paddy watersheds.
CI  - Copyright 2006 Society of Chemical Industry.
FAU - Vu, Son Hong
AU  - Vu SH
AD  - Tokyo University of Agriculture and Technology, Graduate School of Agriculture, 
      3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan.
FAU - Ishihara, Satoru
AU  - Ishihara S
FAU - Watanabe, Hirozumi
AU  - Watanabe H
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Pest Manag Sci
JT  - Pest management science
JID - 100898744
RN  - 0 (Herbicides)
RN  - 0 (Pesticides)
SB  - IM
MH  - Agriculture/*methods
MH  - *Environmental Monitoring
MH  - Fresh Water/*analysis
MH  - Herbicides/analysis
MH  - Monte Carlo Method
MH  - Oryza/growth & development
MH  - Pesticides/*analysis
MH  - Risk Assessment
MH  - Water Pollution, Chemical/analysis/*prevention & control
EDAT- 2006/11/14 09:00
MHDA- 2007/03/24 09:00
CRDT- 2006/11/14 09:00
PHST- 2006/11/14 09:00 [pubmed]
PHST- 2007/03/24 09:00 [medline]
PHST- 2006/11/14 09:00 [entrez]
AID - 10.1002/ps.1295 [doi]
PST - ppublish
SO  - Pest Manag Sci. 2006 Dec;62(12):1193-206. doi: 10.1002/ps.1295.