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Fenoxycarb Fenoxycarb
(ComplyTM, LogicTM, TorusTM and VarikillTM)
is a carbamate insect growth regulator used to control a wide variety of
insect pests. It is used as a fire ant bait and for flea, mosquito, and
cockroach control, and can also be used to control butterflies, moths,
beetles, and scale and sucking insects on olives, vines, cotton, and
fruit. It is also used to control these pests on stored products, and is
often formulated as a grit or corncob bait. Compared to other carbamates,
fenoxycarb is one of the least toxic in this chemical class. Mode of ActionRather
than an instant population knock-down, fenoxycarb blocks the ability of an
insect to change into the adult stage from the the juvenile stage. It also
interferes with larval molting, the periodic shedding or molting of the
old exoskeleton and production of a new, larger one (ETN, 1996). ToxicityFenoxycarb
is a General Use Pesticide, meaning a pesticide applicator license is not
required to apply it. EPA labels fenoxycarb as a toxicity class IV
pesticide (I = most toxic, IV = least toxic) and requires that the word
CAUTION appear on all product labels. Based on studies in lab animals,
fenoxycarb has a relatively low-toxicity. The dermal rat LD50
is greater than 2000 mg/kg and the oral LD50 is greater than
10,000 (ETN, 1996). When fenoxycarb is applied directly to the skin,
laboratory rats exhibited labored breathing and diarrhea. While fenoxycarb
does not irritate the skin, it is an eye irritant. The liver is the
primary organ affected by fenoxycarb in long-term animal studies (ETN,
1996). CarcinogenicityFenoxycarb
is a class B2 probable human carcinogen (PANNA, 2000). Ecological EffectsFenoxycarb
is moderately to highly toxic to fish, depending on the species. Environmental FateFenoxycarb,
is relatively unstable with a half life of one day in soil and 5 hours in
direct sunlight. References
Extension
Toxicology Network (ETN). 1996. “Fenoxycarb.” Pesticide
Information Profiles.
<http://ace.orst.edu/cgi-bin/mfs/01/pips/mancozeb.htm>. Pesticide Action Network North America (PANNA). 2000. “Fenoxycarb.” Chemical Information. <http://data.pesticideinfo.org/4DAction/GetRecord/PC35080>.
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