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Human Health and Environmental Relative Risks of WNV Mosquito Control Products
Appendix V. Environmental Fate
Appendix V. Table 1. Mosquito Adulticides; Environmental Fate |
AI |
CAS # |
T 1/2 soil |
T 1/2 Water |
Solubility water (ppm) |
Koc |
Vapor Pressure |
Malathion |
121-75-5 |
6 - 25 hrs dependent on soil type (58) |
| pH (57) |
T 1/2 |
| 5 |
107 D |
| 7 |
6.2 D |
| 9 |
.0.5 D |
|
145 (25 C) (58) |
405 (57) |
5.3 x 10 -3 Pa (30 C) (58) |
Naled (Dibrom) |
300-76-5 |
< 1 day |
Rapid hydrolysis to the active agent DDVP (58) (about 2 days) |
2000 (20 C) (58) |
108 (58) |
0.27 Pa (20 C) (58) |
Permethrin |
52645-53-1 |
Sandy Loam Soil (58)
| Isomer |
T1/2 |
| 1 R cis |
6 D |
| 1 S cis |
6 D |
| 1 R trans |
4 D |
| 1 S trans |
2.5 D |
|
Readily hydrolyzed (58) |
0.2 (30 C) (58) |
High (58) |
7 x 10 -5 Pa (20 C) (58) |
Phenothrin (Sumithrin) |
26002-80-2 |
| Isomer |
T 1/2 (58) |
| trans |
1-2(aerobic)
2-4W (anaerobic) |
| cis |
1-2 (anaerobic) |
|
Sensitive to light (58) |
0.01 (25 C) (58) |
51,000 (est) (58) |
1.9 x 10 -5 Pa (21.4 C) (58) |
Resmethrin |
10453-86-8 |
Rapid, strongly adsorbed to soil (58) |
Sensitive to oxidation (58) |
0.038 (25 C) (58) |
11, 000 (est) (58) |
< 1 x 10 -5 Pa (25 C) (58) |
PBO |
26002-80-2 |
Mobile in sandy soils T 1./2 14 days (aerobic) (58) |
Stable pH 5, 7, and 9 labile in sunlight T 1/2 8.4 hrs (58) |
14.3 ppm (25 C) (58) |
399 -830 (58) |
2.0 x 10 -5 Pa (60 C) (58) |
Appendix V. Table 2. Mosquito Larvicides; Environmental Fate |
AI |
T 1/2 soil |
T 1/2 Water |
Solubility water (ppm) |
Koc |
Vapor Pressure |
Bti (1) |
NA |
NA |
NA |
NA |
NA |
B. sphaericus (2) |
|
|
|
|
|
Methoprene (3) |
10 - 14 Days (64) |
< 7 days (64) < 2 days (41) |
1390 ug/L (64) 515 ug/L (41) |
-- |
2.37 x 10 -5 mmHg at 25_C (64) |
POE MMF (5) |
B |
stable (64)
Average persistence 5-14 days under standard use conditions (34) |
< 2500 ug/l (64) |
-- |
< 1 mmHg (64) |
Temephos (Abate) (4) |
17 - 29 days (64, 4)
essentially immobile in soils (33) |
15 days (64,4) |
30 ug/L at 25_C (64,4)
0.27 mg/L at 20_C (33) |
4.91 (log K oc ) (64,4)
8969 - 41614 (33) |
7.17 x 10-8 mmHg at 25_C (64,4)
8.62 x 10 -10 mmHg (25_C) (= 1.15 x 10 -7 Pa) (33) |
NEXT: Appendix VI: Use Directions and Estimated modExposures 
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