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APM Mosquito Control is dedicated to using the latest methods and materials in its integrated mosquito management programs. All of the methods and materials proposed are consistent with the American Mosquito Control Association (AMCA), the Michigan Mosquito Control Association (MMCA) and today’s mosquito control industry standards. All materials used in mosquito management program are registered for mosquito control by the Environmental Protection Agency (EPA), and the Michigan Department of Agriculture and Rural Development (MDARD). All chemicals used by APM Mosquito Control have a "caution" label warning.

What products do you use for mosquito control? View our list of product labels and MSDS documents.

Commonly Asked Questions Regarding Pesticides and Mosquito Control Operations
Click on a question to view the answer.

Are the products used toxic?

Are the products used toxic?

Commonly Used Mosquito Control Products Toxicity Chart

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What are the environmental impacts of larvicides?

What are the environmental impacts of larvicides?

The larval control products (Bti and Bs) used by APM Mosquito Control are target specific to mosquito larvae and black fly larvae. The bacteria contained in VectoBac (Bti) and VectoLex (Bs) occur naturally in the soil. Both of these soil bacterium can be processed through the systems of mammals, birds, reptiles, amphibians and nearly all aquatic invertebrates. The main benefit for application of these products enables the reduction of mosquito larvae at a reasonable cost without negatively impacting the natural environment. There have been no notable implications associated with application of these larvicides to the natural environment.

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How do VectoBac and VectoLex work?

How do VectoBac and VectoLex work?

The Bti bacterium produces a protein crystal which is toxic to only mosquito and black fly larvae. APM Mosquito Control uses the dry granular formulation of both of these products. The granules measure about ¼” in diameter and are dispensed by hand spreader, power backpack, and at select sites in the spring by aircraft. The crystals are carried on corn cob, which begin to separate from the corn cob when the product hits the water surface. Because the larvae must ingest the bacteria, the granular products must be applied where water is present. The crystals are dissolved and converted into toxic proteins in the alkaline environment of the mosquito’s gut. These toxic proteins destroy the larval intestinal lining and the larvae ceases to feed. The perforations in the larval gut ultimately cause the larvae to die within 24-48 hours after ingestion.

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Does garlic work as a repellent or insecticide?

Does garlic work as a repellent or insecticide?

Although garlic has exhibited some activity against mosquitoes, the active ingredient in garlic is Allicin. This chemical has an LD50 of 60 compared to permethrin, which has an LD50 of 4,000. Note that the lower the LD50, the more toxic the substance. We would suggest an EPA approved repellent for personal protection.

There is no research that directly supports the effectiveness of this product as an adulticide either. Garlic has not completed the registration process through the EPA and is not supported as a registered adulticide for adult mosquito control.

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What is permethrin?

What is permethrin?

Permethrin is an insecticide in the pyrethroid chemical family. Pyrethroids (also known as synthetic pyrethroids) are insecticides chemically similar to pyrethrins found in natural pyrethrum. Natural pyrethrins are extracted from the flowers of the chrysanthemum, which have been recognized for centuries for their insecticidal activity. Pyrethroids do not have the extent of adverse effects on non targets unlike other insecticide groups.

Pyrethroids are widely used in public health applications because of their relative safety for humans, high insecticidal potency at low dosages and rapid knock-down effects. First developed in 1973, pyrethroids are more stable to light than natural pyrethrum. Please access more information and a list of resources listed in the critical review on the safety of pyrethroids issued by the World Health organization (WHO) at this link.

Permethrin was originally registered for use by the United States Environmental Protection Agency (U.S. EPA) in 1979, and was re-registered in 2006. Visit this link for information about the registration process conducted by the EPA. READ MORE: EPA pdf on re-registration

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What is permethrin used for?

What is permethrin used for? (obtained from www.epa.gov)

Permethrin is registered for use on/in numerous food/feed crops, livestock and livestock housing, modes of transportation, structures, buildings (including food handling establishments), public health mosquito abatement programs, and numerous residential use sites including use in outdoor and indoor spaces, pets, and clothing (impregnated and ready to use formulations).

According to Agency data, the EPA cites that approximately 2 million pounds of permethrin are applied annually to agricultural, residential and public health uses sites. The majority of permethrin, over 70%, is used in non-agricultural settings; 55% is applied by professionals, 41% is applied by homeowners on residential areas, and 4% is applied on mosquito abatement areas.

Permethrin is a restricted use pesticide for crop and wide area applications (i.e., nurseries, sod farms) due to high toxicity to aquatic organisms, except for wide area mosquito adulticide use. It is a general use pesticide for residential and industrial applications. Permethrin also has non-FIFRA pharmaceutical uses as a pediculicide for the treatment of head lice and scabies. The Food and Drug Administration (FDA) approves use of the pesticide-containing pharmaceutical under FFDCA.

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What are the effects on other insects from spraying?

What are the effects on other insects from spraying?

Extensive studies have shown little effect on insects from ULV fogging for adult mosquitoes. ULV applications use Ultra Low Volumes, i.e. less than 1.0 ounce per acre, in microscopic sized droplets of a low toxicity product. We can minimize the negative non-target effects through the combination of ULV technology, limiting applications to periods of high annoyance or disease threat, and selecting the period of the evening when many other non-target insects are not active. Please note that although permethrin does present toxicity to bees, many bees are not flying/ pollinating at the time mosquito spraying is performed.

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What are the effects of permethrin exposure in humans?

What are the effects of permethrin exposure in humans?

Pyrethroids do not accumulate in the body and their excretion is rather rapid, even after repeated administrations: typically, 90% of the administered dose is excreted in urine and feces within a week after treatment. In addition, Permethrin has been used for many years, with no human poisoning cases reported. No indication exists that permethrin has a significant adverse effect on humans when used as recommended. It has induced skin sensations and paraesthesia in exposed workers, but these effects disappear within 24-48 hours. Transient numbness, itching, tingling, and burning sensations have been reported in a small percentage of humans after dermal exposure to permethrin when it was used to treat head lice (World Health Organization, 1990).

With respect to mosquito applications, many people do not risk any exposure to permethrin if their windows are closed and they are within their homes during a mosquito spraying application. Once the visible mist has dissapated from a ULV truck going by there is minimal permethrin left in the area. There may be some residual on foliage and other solid objects that were in the direct path of the ULV spray, however the exposure for humans is minimal at this point.

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What is the half life of permethrin?

What is the half life of permethrin?

In soil the average half-life of permethrin in aerobic soils is 39.5 days, with a range from 11.6 to 113 days. Permethrin binds tightly to soil and is broken down primarily by microorganisms, but also by photolysis.

When exposed to water some of the product is degraded some is degraded by sunlight while in the water column but the majority binds tightly to the sediment. The average half-life range for permethrin in the water column is about 19-27 hours, however permethrin adsorbed to sediments can persist more than a year. Permethrin is not likely to contaminate groundwater due to its low water solubility and strong adsorption to soil.

READ MORE: NPIC technical fact sheet on permethrin

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How much permethrin can people be exposed to?

How much permethrin can people be exposed to?

The U.S. EPA has determined a RfD of 0.25 mg/kg/day for both acute and chronic dietary exposures to permethrin. The RfD is an estimate of the quantity of chemical that a person could be exposed to every day for the rest of their life with no appreciable risk of adverse health effects. The reference dose is typically measured in milligrams (mg) of chemical per kilogram (kg) of body weight per day. No human data were found on chronic effects of permethrin.

The U.S. EPA has not determined a Maximum Contaminant Level (MCL) MCL for permethrin in drinking water. However, a limit of 0.3 mg/L was set by the World Health Organization (WHO) as a guideline for permethrin in drinking water when it is applied to water for mosquito control.

The Agency For Toxic Substances and Disease Registry (ATSDR) determined Minimum Risk Levels (MRLs) for oral exposures to technical grade permethrin of 0.3 mg/kg/day for acute oral exposures (up to 14 days) and 0.2 mg/kg/day for intermediate durations (15-364 days).

READ MORE: NPIC technical factsheet on permethrin

READ MORE: EPA Permethrin Reregistration

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Is permethrin linked to the honey bee die off?

Is permethrin linked to the honey bee die off?

Funding has allowed for collaborative comparative studies to be initiated, including many professionals and experts from across the country to further investigate the phenomenon of Colony Collapse Disorder. CCD was largely documented in 2006 and was initially linked to varro mites. Research on the declining bee population is only just beginning; with pathogens, environmental chemicals, and nutritional stressor being some of the most recent causes being considered. One class of pesticides under close scrutiny by beekeepers and the press are neonicotinoids, which are known to be quite toxic to honey bees. We strongly encourage you to review the current literature available to stay informed.

READ MORE: Penn State research

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