Pesticide Information

Below is a chart listing some of the chemicals that will most likely be used in the mosquito spray program.



 
 
 

PEST
INSECTICIDE
MIXING AND APPLICATION
RATE @ 10 MPH
DROPLET SIZE (um)
REMARKS RELATIVE TOXICITY TO BEES
LD50 IN ug/BEE
Mosquito Adults (Ground application)
resmethrin (18%) + piperonlyl butoxide (54%) (Scourge)
Dilute 12.5 fl oz with 1 gal of light mineral oil; use in ULV sprayer
4.5 to 9 fl oz/min
MMD = 12 um
 
Highly Toxic
0.054
permethrin 10% - 57% concentrate
Apply undiluted or mix with refined mineral or soybean oil
0.31 to 15 oz/min depending on dilution
MMD = 8 to 30 um
Highly Toxic
naled (Dibrom) 85% concentrate
10 fl oz to 10 gal No.2 fuel or diesel oil; use in thermal fog sprayer
OR
Dilute 0.5 gal to 5 gal with soybean oil or HAN; use in ULV sprayer
80 gal/hr (for fog sprayer)

6.0 to 12 fl oz/min (for ULV sprayer)

11 to 20 um MMD = 15 um (for ULV sprayer)
Do not spray if there is a breeze more than 5 mph.  Avoid direct application to vehicles; may damage paint. Apply when air temps are cool and wind is 3 mph or less. Toxic to fish, aquatic invertibrates, and wildlife.
Highly Toxic
0.485
 
malathion
Use undiluted on aerosol ULV sprayer.
OR
Dilute 3.9 to 5.2 gal to 100 gal with No. 2 fuel or diesel oil; use in thermal fog sprayer
2.0 to 4.3 fl oz (for undiluted ULV)
6 to 48 um MMD = 17 um (for ULV sprayer)
same as naled above
Highly Toxic

*ULV sprays are bee-safe unless the hive itself is sprayed

0.726
Mosquito Adults (Fixed-wing aerial application)
malathion 95% concentrate
Use undiluted
2.6 to 3 fl oz/acre
90% of droplets <100um MMD = 50-60 um
Aircraft should be operated at 80 mph or more; large droplets may spot car paint. Toxic to fish, aquatic invertebrates, and wildlife. Do not directly apply to water or to areas where runoff into water is likely to occur.
Highly Toxic

*ULV sprays are bee-safe unless the hive itself is sprayed

naled (Dibrom) 85% concentrate
Use undiluted 
OR
Dilute 50 to 100 gal with No.2 fuel oil or diesel fuel
0.5 to 1 fl oz/acre(undiluted)

1 gal/acre(diluted)

30 to 80 um (for undiluted)
same as malathion above
Highly Toxic
 
Sumithrin (Anvil 10-10)
0.336 lb/acre
   
ULV Application is bee-safe unless the hive itself is sprayed
Relatively Nontoxic
0.6743
 
-Treatment of immature mosquitoes is generally not a threat to bees, unless aerial application of pesticides is involved.

 
 


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