| PESTICIDE
BRIEFS (7/31/02)
CONTENTS:
(1) NEW PESTICIDE
CHEMISTRIES
(2) METHYL BROMIDE
(3) TOLERANCE REVOCATIONS
FOR EIGHT PESTICIDES
(4) BENOMYL TOLERANCE
REVOCATIONS ANNOUNCED
(5) METHOXYCHLOR
TOLERANCES REVOKED
(6) REASSESSMENT
OF MORE NON-CONTRIBUTING OP's
(7) OXADIXYL TOLERANCE
REVOCATION
(8) LINURON TOLERANCE
REASSESSMENT
(9) TOLERANCE REVOCATIONS
FOR 23 PESTICIDES
(10)
VELVET ANTS
(11) CICADA
KILLERS
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(1) NEW
PESTICIDE CHEMISTRIES
For updated Transitional Solutions/New
Technology Tables from IR-4, go to:
http://www.udel.edu/pesticide/newche~2.pdf
(2) METHYL
BROMIDE
For Q & A on methyl bromide
"critical use exemption" process, go to: http://www.udel.edu/pesticide/mebr.pdf
. Let Grier Stayton ( grier@dda.state.de.us
) at DDA know of any critical uses in Delaware that would be affected.
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(3) TOLERANCE
REVOCATIONS ANNOUNCED FOR CERTAIN USES OF EIGHT PESTICIDES
On July 17, 2002, EPA published
a final rule that revokes 75 specific tolerances for residues of eight
pesticide chemicals: the insecticides phosphamidon (Cildon, Aimphon,
Dimecron) and trimethacarb (Broot, Landrin); the herbicides
atrazine,
bensulide (Prefar), vernolate (Surpass), and diphenamid (Rideon,
Trefmid, Dymid, Enide); the fungicide imazalil (Magnate, Impala,
Celest); and the fungicide/ insecticide oxythioquinox (Morestan).
The 75 tolerances are being revoked because all registrations for these
pesticide uses have been canceled or there are no registered uses for certain
crops. EPA must receive objections and requests for hearings, identified
by docket control number OPP-2002-0085 on or before September 16, 2002.
The notice proposing these revocations was published August 1, 2001.
EPA received comments related to
the proposed revocation of two pesticides in that notice: carbofuran
and fumaric acid. The registrant commented about a possible
need to retain carbofuran tolerance on rice and rice straw for import purposes.
EPA will not revoke these tolerances pending review of data that the registrant
will submit in support of this request. In addition, EPA is evaluating
the issues related to the fumaric acid tolerance exemptions and will not
revoke these tolerances at this time. The Federal Register notice
provides details of effective dates for revocation of the tolerances covered
by this notice. It is available at:
http://www.epa.gov/fedrgstr/EPAFR-CONTENTS/2002/July/Day-17/contents.htm
.
Commodities containing pesticide
residues not covered by a tolerance are considered to be adulterated and
are subject to seizure. A tolerance must meet the current safety
standard established under the Food Quality Protection Act if it is to
be retained.
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(4) BENOMYL
TOLERANCE REVOCATIONS ANNOUNCED
On July 17, 2002, EPA published
a Federal Register notice revoking all tolerances (pesticide residues allowed
to remain in food) for residues of the fungicide benomyl
(Benlate) because this pesticide is no longer registered for use
in the United States. EPA must receive objections and requests for
hearings, identified by docket control number OPP-2002-0068 on or before
September 16, 2002. EPA received no comment that expressed a need
for the retention of specific tolerances for import purposes. The
Federal Register notice includes a response to the two comments received
regarding domestic use of benomyl. EPA has established expiration
dates for the tolerances to take into account the time needed for legally
treated commodities to pass through the channels of trade, based on the
expectation that stocks will be exhausted by December 31, 2003 and the
typical storage, processing, and distribution activities associated with
each commodity. These tolerance expiration dates are listed in the
Federal Register notice at
http://www.epa.gov/fedrgstr/EPA-PEST/2002/July/Day-17/p17872.htm
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(5) METHOXYCHLOR
TOLERANCES REVOKED
EPA has announced the revocation
of all tolerances for residues of the pesticide methoxychlor (Marlate)
for two reasons: all registrations of pesticides containing methoxychlor
are suspended or canceled, and there are insufficient data to find the
pesticide safe as required by the Federal Food, Drug, and Cosmetic Act
(FFDCA). The primary registrant of methoxychlor (Kincaid Enterprises,
Inc.) has failed to submit the necessary data required to support continued
registration under FIFRA of pesticide products containing methoxychlor.
As a result, on January 14, 2000, EPA issued a suspension order to Kincaid
Enterprises, Inc., to prevent the further manufacture and sale of methoxychlor
products. Methoxychlor is an organochlorine insecticide, originally
registered as a replacement for DDT. It has been used on fruits and
vegetables to control a variety of pests. It also has been used to
control certain pests on livestock. EPA proposed revocation of all
methoxychlor tolerances on April 4, 2002.
The Federal Register notice announcing
these revocations is available at
http://www.epa.gov/fedrgstr/EPA-PEST/2002/July/Day-17/p17873.htm
.
EPA has delayed the effectiveness
of these revocations for 90 days following publication of this final rule
to ensure that all affected parties receive notice of EPA's actions.
This regulation is effective October 15, 2002. EPA must receive objections
and requests for hearings, identified by docket ID number OPP-2002-0118,
on or before September 16, 2002. For this final rule, EPA believes
that all existing stocks of pesticide products labeled for the uses associated
with the tolerances proposed for revocation have already been exhausted
since such products have been suspended since June 26, 2000. Similarly,
EPA believes that commodities legally treated with methoxychlor have by
this time cleared the channels of trade.
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(6) EPA
ANNOUNCES REASSESSMENT OF SECOND GROUP OF NON-CONTRIBUTING ORGANOPHOSPHATE
TOLERANCES
EPA has published an announcement
on the reassessment of 47 organophosphate pesticides that do not contribute
to risk at: http://www.epa.gov/pesticides/cumulative/GT1percent-july22.htm
This action is part of its review of OP
and other pesticide tolerances under FQPA. EPA considers these tolerances
reassessed. On May 22, EPA announced reassessment of a group of 275
OP tolerances that do not contribute to risk and announced that additional
similar reassessment notices would be published in the future.
The 47 OP non-contributor tolerances
in this second group make at most a negligible contribution to the cumulative
risk from the OP pesticides. In making the determination that these
tolerances contribute negligible (if any) residues and/or risk, EPA considered,
among other things, the nature of the use of the pesticide, the data used
in conducting aggregate risk assessments for each individual OP pesticide,
the potential for drinking water contamination, and other data and analyses
available to EPA (such as food residue monitoring and other information
that EPA is using for the cumulative risk assessment). EPA concludes
that these pesticide uses result in minimal or no detectable residues in
food, and have no or negligible effects through drinking water. Because
a tolerance may apply to more than one raw agricultural commodity, no tolerance
is reassessed as a non-contributor unless all of the raw agricultural commodities
(food forms) that are part of that tolerance are also considered to be
non-contributors. EPA also considered the potential effects of future
OP pesticide risk management decisions and determined that such decisions
would be very unlikely to increase the use of the pesticide on these use
sites in a manner or to a degree that the potential exposure under the
tolerance would no longer be negligible. They therefore meet the FQPA safety
standard in section 408(b)(2) of the Federal Food, Drug, and Cosmetic Act
and can be considered reassessed.
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(7)
TOLERANCE REVOCATION COMPLETED FOR OXADIXYL
EPA has revoked all tolerances for
the combined residues of the fungicide oxadixyl (Recoil, Ripost,
Sandofan, Wakil) and its desmethyl metabolite with an expiration/ revocation
date of September 27, 2003. EPA believes that this date allows sufficient
time for any oxadixyl-treated food commodities to pass through the channels
of trade. EPA did not receive any comments on its proposal to revoke
these tolerances, which appeared in the Federal Register on February 6,
2002. According to letters from the registrants, the last known production
of oxadixyl occurred before January 1, 1997, and no stocks remain in the
control of the registrants. The cancellation order, issued November
1, 2001 with an effective date of September 27, 2001, allowed for existing
stocks to be sold for one year from that date. Oxadixyl is a systemic
fungicide that was used to treat seeds of a variety of food crops, as well
as vetch, golf course turf, and residential lawns. This Federal Register
notice is available on EPA's web site at:
http://www.epa.gov/fedrgstr/EPA-PEST/2002/July/Day-10/p16859.htm
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(8) LINURON
TOLERANCE REASSESSMENT DOCUMENT ISSUED
EPA has reviewed risks and existing
tolerances for the herbicide linuron (Linex, Lorox), and
considers the 40 associated tolerances reassessed as having met the Federal
Food, Drug, and Cosmetic Act (FFDCA) safety standard. Three new linuron
tolerances also are being proposed. EPA's June 26, 2002, Federal
Register notice announcing the availability of the Linuron TRED and related
documents is available on EPA's website at : http://www.epa.gov/fedrgstr/
The Linuron TRED and an overview are available at http://www.epa.gov/pesticides/reregistration/status.htm
EPA had completed a Linuron Reregistration
Eligibility Decision (RED) in December 1994, prior to enactment of FQPA.
EPA must review tolerances and tolerance exemptions that were in effect
when FQPA was enacted to ensure that these existing pesticide residue limits
for food and feed commodities meet the safety standard brought about by
the new law.
The pesticide reregistration program
is being conducted under Congressionally mandated time frames, and EPA
recognizes both the need to make timely decisions and to involve the public.
EPA, therefore, is issuing the Linuron TRED as a final decision document
because no risk mitigation or changes to existing labeling are necessary.
If any comment causes EPA to revise its tolerance reassessment decision,
EPA will publish a notice of amendment in the Federal Register. In
the absence of substantive comments, the tolerance reassessment decision
for linuron will be considered final.
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(9) TOLERANCE
REVOCATIONS ANNOUNCED FOR CERTAIN USES OF 23 PESTICIDES
On July 31, 2002, EPA published
a rule to revoke 140 specific tolerances for residues of 23 pesticide chemicals:
acephate
(Address, Lancer), amitraz (Mitac, Ovasyn), carbaryl (Sevin, Adios),
chlorpyrifos (Lorsban), cryolite (Kryocide, Prokil), disulfoton (Di-Syston),
ethalfluralin (Curbit), ethion, ethoprop (Mocap), fenthion (Baytex, Lebaycid),
fluvalinate (Spur), methamidophos (Monitor), metribuzin (Sencor, Lexone),
oxamyl (Vydate), phorate (Thimet), phosalone (Azofene, Zolone), phosmet
(Imidan), pirimiphos-methyl (Acetllifog, Blex), profenofos (Curacron),
propiconazole (Tilt), tetrachlorvinphos (Rabon), thiram (Thylate),
and
tribufos (DEF 6). These tolerances are being revoked because
they are either no longer needed or are associated with food uses that
are no longer current or registered in the United States. Some of
these revocations are based on recommendations made during the reregistration
decision process. Information on the specific tolerances being revoked,
the reasons for their revocation, and the expiration dates for the tolerances
is at:
http://www.epa.gov/fedrgstr/EPA-PEST/2002/July/Day-31/p19104.htm
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(10)
VELVET ANTS
Homeowners
may find Velvet Ants in their yards in August. Velvet Ants (also
called Cow Killers) are really wingless stinging wasps. They look
velvety & are quite pretty. Children can be attracted to them
because of their bright red-orange color. Most species are believed
to be parasitic in the nests of wasps and ground-nesting bees. Female Velvet
Ants run on the ground searching for prey which they sting and paralyze.
The female then lays an egg on the immobile host. Upon hatching,
the Velvet Ant larva eats the host. The adults are only active for
a few weeks in the summer. Then they seem to dissapear.
Are they good
bugs or bad? We usually classify predatory insects as beneficial,
but Velvet Ants prey on other predatory insects! We usually classify
stinging insects as harmful. Even though they may pose a hazard to
young children and pets, there are no chemical controls available.
Because they do not live in a nest, there is no site to treat. It
is best to teach children to look, but not touch. Homeowners can
keep pets away from areas that Velvet Ants frequent during these few weeks
of activity.
Want to see a Velvet
Ant? Come to the Department of Entomology & Applied Ecology Insect
Reference Collection (room 259) and Dr. Charles Bartlett will be pleased
to show you one. A dead one.
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(11)
CICADA KILLERS
Cicada Killers are very large
black and yellow wasps. They are hard to miss in August, especially
in years of peak cicada activity. Female Cicada Killer Wasps dig
a burrow in the ground. Then they find a cicada, sting it to paralyze
it, and take it into the burrow. The female then lays an egg on the
paralyzed cicada. When the egg hatches, the cicada killer larva eats
the paralyzed cicada. The female wasp is oblivious to humans -- she
is frantically hunting cicadas to provision her burrows -- but she might
sting a cat or dog that got too curious. Females are active during
July & August, then die.
The male does not sting (No
ovipositor. Remember, a stinger is a modified ovipositor. No
male Hymenopteran can sting). The male defends the burrow and chases
away predators. But, he is all bluff and cannot hurt humans or pets.
Yes, the mound of soil around the
burrow may ruin the look of well-groomed turf. I tell homeowners
to plant ground cover to discourage activity and hide the mounds and holes.
I discourage homeowners from wanting to treat Cicada Killers. These
predators are beneficial insects and a natural part of the environment.
Rarely do they pose a real problem to us.
For more info on cicadas go
to:
http://ohioline.osu.edu/hyg-fact/2000/2137.html
and:
http://www.ento.vt.edu/Fruitfiles/cicada.html
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