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As defined in the Federal Register, April 7,
2000 (Volume 65, Number 68, Page 18821- 18835),
the Food Quality Protection Act (FQPA) Risk Avoidance and Mitigation for Major
Food Crop Systems Program (RAMP) is a
long-term research, education, and extension program to develop
reduced-risk pest management strategies. This is necessitated by the demand of
global markets for high quality,
competitively priced food and grain products. Additionally, growers face
market demands, ever-increasing production costs, and unstable commodity prices.
These constraints are further exacerbated by
implementation of regulatory actions, because many of the pest
management tools available to growers in the past may be severely restricted or
eliminated. Growers face uncertainty
regarding which pest management tactics will continue to be available and
how to make use of new technologies, such as bio-engineered crop innovations and
precision agriculture in their production
systems. There is a critical need to devise pest management systems
that consider all aspects of crop production.
This
proposal addresses replacements as a result of FQPA requirements for organophosphorous
(OP) insecticides that are used directly on postharvest grain stored by
farmers and grain elevators and loss of methyl
bromide as a result of the Montreal Protocol
in processing facilities. Additionally,
several OPs are used for structural pest control in
flour mills, food processing facilities, and warehouses holding finished food
products destined for wholesale and retail
distribution. Furthermore, replacements are needed for the fumigants phosphine,
used for treatment of bulk-stored grain, and methyl bromide, used for
disinfesting food-processing facilities. The
use of both these fumigants may be limited in the future because of
human safety and environmental concerns.
Stored-product insects cause significant
damage to the multi-billion dollar grain and food industries
each year. These insects infest raw grain in storage, milled products, or
packaged and processed finished goods. Some
of the OPs used for stored products are applied directly to raw grain
and residues of these OPs are found in grain marketed domestically (USDA 1998a,
b). OP compounds are also applied to indoor
floor and wall surfaces of flourmills, food plants, warehouses,
and grocery stores to control stored product insects. EPA under the FQPA mandate
will undertake a thorough risk assessment of all OP
insecticides, because they either contribute to
dietary or occupational exposure risk. We propose that effective non-OP and
fumigant alternatives for postharvest grain
and food uses can be expanded using existing products and technologies,
or developed through research on new products and approaches.
This project will address Objectives I and II
of the RAMP program: develop methods of pest management that reduce or eliminate the
risk from pesticide residues
implement information intensive
approaches to pest management based on a more complete
understanding of crop and pest biology, their interactions and mutual impacts,
and factors impacting the stability of pest
management systems in major cropping systems.
A Consortium
for Integrated Management of Stored Product Insect Pests (CIMSPIP)
is proposed as a collaboration between scientists at Kansas State University
(Manhattan, KS), Oklahoma State University
(Stillwater, OK), Purdue University (West Lafayette,
IN), and the USDA-Agricultural Research Service Grain Marketing and Production
Research Center (USGMPRC) (Manhattan, KS), and
industries involved in research and management
of stored product pests. The CIMSPIP brings together entomologists, agricultural
engineers, and agricultural economists with vast
research and extension experiences in a "center without
walls", focusing the talents and insights of a critical mass of outstanding
scientific expertise to address significant
pest problems in the post-harvest arena by using innovative approaches
and cutting-edge methods to reduce reliance on pesticides, as mandated by FQPA.
An advantage of such a Consortium is the sharing
of critical resources and facilities, fostering
collaborative partnerships to conduct world-class research, and integrating
experience and expertise from academia, USDA
laboratories, and industry.
Within the
United States, there are few federal or state facilities that are conducting
research exclusively on insect pest management on
raw grains or in food storage facilities.
Biological Research Unit (BRU) at the GMPRC in
Manhattan has 12 permanent Category 1
research scientists devoted exclusively to various aspects of research on
stored-product insects. Combining the
scientists in the BRU with the 5 permanent scientists in the Engineering
Research Unit at the GMPRC, and with the entomologists at Kansas State
with responsibilities for stored product insects
yields one of the largest if not the largest concentration
of stored-product researchers in the world located in Manhattan, KS. Of
the land-grant universities in the United
States, only
The
collaborative effort will examine the potential for materials currently
registered for stored grain and other crops
to be used in unique ways. Several are
approaches that employ knowledge of insect
genetics, behavior modifying chemicals, insect growth
regulators, natural botanical or bacterial materials, naturally-occurring
insecticidal desiccants, and extreme
temperatures projects include an pest
control operators and others with the help of the Association of Operative
Millers, a American Feed Industry
Association, and National Pest Control Association. Finally, we will expand
our existing website (see below for details) to provide updated information to
clientele throughout the United States and
the world. We will solicit formal stakeholder reviews after the second
field season and at the end of the project to evaluate project effectiveness.
Thus, outcomes
from the proposed Consortium include: new uses (labels) for registered, "safe"
materials, production of scientific and extension publications, websites, CDs,
and workshops and cutting-edge training of
numerous undergraduate and graduate students, postdoctoral
research associates, and end-users in stored product IPM.
Why is
managing stored product insects important? Stored
product insects are adapted to infesting raw
grains and cereal products, and present a constant threat to these commodities
worldwide. These insect pests survive on dry, stored cereals and legumes in raw
or processed form, and they are maintained
year after year in storage systems by residual grain remaining
in bins, poor sanitation in mills, food-processing facilities and warehouses,
and storage, and immigration form natural
(rodent caches, bird nests, wooded areas) and other infested
sites. commonly
and routinely used to eliminate active pest infestations.
Several IPM-based methods are available to
help manage insects in bulk grains
(Hagstrum
et al. 1999). insect-free
structures), drying grain before loading into storage to maintain a low moisture
content (12-13%), and using low-volume ambient air
(aeration) to cool and maintain grain below 15.6°C
(60F°), which is the lower temperature limit for survival, development and
reproduction for stored-product insects.
Grain can be treated with a protectant (OPs or alternatives, especially DE)
as it is loaded into a bin. Once in storage, grain can monitored by removing
grain samples or insect traps, and if pest
populations are detected and estimated to exceed acceptable levels (>2
live insects/kg), alternative techniques such as
grain turning, use of aeration, or properly timed fumigation
with phosphine can prevent significant grain damage. However, there are still
situations where non-chemical IPM strategies may
not be feasible, and insecticides are required to
prevent economic damage. Producers who store grain on-farm often use protectants
if the grain is stored for six months or
longer (Barak and Harein 1981, Kenkel et al. 1992, Martin et al. 1997).
On-farm storage bins often are not equipped with aeration systems or temperature
monitoring devices. In addition, many of these
on-farm structures either cannot be fumigated with
phosphine or producers cannot afford the cost of commercial treatment. Grain
stored in large grain elevators within
high-risk geographic zones (e.g., the southeastern U.S.) may also be treated
with OP grain protectants. Finally, some domestic and foreign customers may
require protectant application or fumigation
as a condition of sale.
Pest control
in processed food situations is much different than with that in raw grain.
Flour and other grain based processed foods represent value-added products, and
the industry cannot tolerate even low levels of
insect infestation. There is essentially zero tolerance
for insects or damage, irrespective of the established federal defect action
levels (see Kenkel et al. 1992). Insects
that do not bore into the kernel, but
feed on kernel germ and endosperm, or on
broken kernels and grain dust in raw grain, such as the red flour beetle,
Tribolium castaneum Oryzaephilus
surinamensis (L.), and the
Indianmeal moth, Plodia interpunctella (Hübner)
are major pests in flour mills, bakeries, food
plants and warehouses. OP insecticides are used extensively in these facilities
as space sprays (fogging), aerosols, or for
crack and crevice treatment (Subramanyam et al. 1993). Methyl
bromide is also used in many facilities, in combination with residual materials,
and its phaseout by 2005 will
necessitate adoption of effective alternatives under the IPM umbrella.
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