Re-evaluation Decision RVD2015-04, Dimethoate describes the PMRA’s regulatory process concerning the re-evaluation of dimethoate, as well, summarizes the Agency’s decision, the reasons for it. Due to occupational risk concerns these uses will be cancelled. Dimethoate; pesticide tolerance. Users have indicated that the calculated REIs for seed cone harvesting of 48 and 49 days are agronomically feasible. March 2013. Centers for Disease Control and Prevention (CDC). The majority of the incidents indicated the route of exposure was ingestion or spray drift. Based on additional use pattern information submitted in response to PRVD2011-12 for dimethoate, the occupational risk assessments for forestry uses (Douglas fir (seed tree), Sitka spruce (seed tree) and spruce (seed tree and woodland)) and right-of-way sprayer application were reassessed. The label for the dimethoate products will be amended to reduce exposure to pollinators (see Appendix IV of Re-evaluation Decision RVD2015-04, Dimethoate). Listed dimethoate insecticide manufacturers, suppliers, dealers & exporters are offering best deals for dimethoate insecticide … Uses/Sources: Dimethoate is an organophosphate insecticide used to kill mites and insects systemically and on contact. Dimethoate formulations are used to control a wide range of Acari, Aphididae, Aleyrodidae, Coccidae, Coleoptera, Collembola, Diptera, Lepidoptera, Pseudococcidae and Thysanoptera in cereals, citrus, coffee, cotton, fruit, grapes, olives, pastures, beetroot, potatoes, pulses, tea, tobacco, and vegetables. Dimethoate is widely distributed to body tissues and metabolized in the liver to omethoate (most likely via the cytochrome P450 enzyme system), which is then rapidly broken down to several methylated dialkyl phosphate metabolites that are eliminated in urine within 1-2 days (IPCS, 1989; Menzer and Best, 1968). Dimethoate hydrolyzes rapidly under alkaline conditions (half-life at pH 9 at 25 °C is about 4 days) leading to O-desmethyl dimethoate and O,O-dimethyl thiophosphoric acid. After a thorough re-evaluation of the insecticide dimethoate, Health Canada’s Pest Management Regulatory Agency (PMRA), under the authority of the Pest Control Products Act, is granting continued registration for the sale and use of dimethoate products in Canada. Montesano MA, Olsson AO, Kuklenyik P, Needham LL, Bradman A, Barr DB. When dimethoate is used in accordance with the label and the mitigation measures have been applied, the reduced environmental exposure is deemed adequate and the risk is considered to be acceptable. Although laboratory studies indicate that dimethoate is mobile in soil, it is not detected in groundwater, most likely due to its rapid break down. These uses include the following: application to structural sites, paint-on treatments to birch, roses and lilac, as well as, soil drench application to carnations. June 12, 2006. Many of the bees from the Nova Scotia and Saskatchewan sites contained dimethoate residues, as determined by laboratory analysis. Table 2.—Dimethoate Product Registration Amendments to Terminate Uses. In short-term feeding studies, laboratory animals showed reduced cholinesterase activity in red blood cells, plasma, and the brain despite a lack of clinical signs of toxicity (IPCS, 2003). These measures, in addition to those already identified on existing dimethoate product labels, are designed to further protect human health and the environment. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. These insecticides generally were not detectable in urine specimens collected from subsamples of NHANES 2003-2004 and 2005-2006 participants (CDC, 2013). Rogor controls aphid and a number of other insect pests on a wide range of horticultural and agricultural crops. When assessing health risks, two key factors are considered: Reports and Publications – Consumer Product Safety, Pesticides and pest management reports and publications. Dimethoate (DM) is an organophosphate insecticide with numerous uses on field and agricultural crops and ornamentals. Like all organophosphates it is related to the nerve gases and is among the most toxic of all pesticides to vertebrates, including humans. 1993;31(3):177-82. Interim reregistration eligibility decision for dimethoate. Omethoate appears to be responsible for dimethoate toxicity in insects and mammals (IPCS, 1989). U.S. Environmental Protection Agency (U.S. EPA). Toxicology studies in laboratory animals describe potential health effects from varying levels of exposure to a chemical as well as identify the dose where no adverse effects are observed. Dimethoate is an effective systemic insecticide for use on plants, has shown promise as a chemotherapeutic agent for control of cattle grubs and certain other insect pests of farm animals, and has high contact toxicity to house-flies and many other insects. Keep unnecessary people away; isolate hazard area and deny entry. Available at: https://www.gpo.gov/fdsys/pkg/FR-1995-07-05/html/95-16432.htmexternal icon.4/20/13, Centers for Disease Control and Prevention. Environmental Health Criteria 90. DIRECTIONS FOR USE: Restraints DO NOT use to control pests that are resistant to organophosphorus insecticides as treatment may be ineffective. The reported magnitude of effects ranged from 2000 to 3000 dead bees in front of 95 colonies in Nova Scotia to a reported 50% loss of honey bees at sites in Saskatchewan. Aggregate risk from exposure incurred as a patron of a “Pick Your Own” orchard or berry facility is not of concern. Use scenarios that remain of concern include paint-on-applications (ornamentals), soil drench applications (carnations), and applications to structural sites. When used according to label directions, dimethoate is not expected to pose an unacceptable risk to the environment. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. Dimethoate is in a class of insecticides called organophosphates. In insects, dimethoate metabolizes to omethoate, but mammals appear to have lower levels of the enzyme responsible for this metabolic conversion.In animal studies, dimethoate was rapidly absorbed after oral dosing and more slowly after skin application (Sanderson and Edson, 1964). Occupational risk assessments from handling dimethoate consider exposure to workers who mix, load and apply the pesticide. Canadian MRLs for dimethoate on apples, cabbage, and spinach will be revoked as the use on these commodities has been discontinued by the registrant in both Canada and the United States. Organisation for Economic Co-operation and Development Status. [online] Available at URL: https://www.cdc.gov/exposurereport/. The Act also requires that products have value when used according to the label directions. Food Chem Toxicol. Directions include risk-reduction measures to protect human and environmental health. The Food and Drugs Act prohibits the sale of adulterated food, that is, food containing a pesticide residue that exceeds the established maximum residue limit (MRL). Metabolism of organophosphorus insecticides—XI. Biochem Pharmacol 1969;18(10):1419-38. In addition, the MRL for lettuce will be changed to leaf lettuce as the use on head lettuce has also been discontinued. Detailed Description ROGORUS (DIMETHOATE 30% EC) is a cost effective Systemic Insecticides containing 300 g/l Dimethoate tech. Acephate is an organophosphate foliar and soil insecticide of moderate persistence with residual systemic activity of about 10–15 days at the recommended use rate. Dimethoate 40% EC, US $ 1 - 100 / Liter, Acaricide, Insecticide, N/A, 60-51-5.Source from Nanjing Essence Fine-Chemical Co., Ltd. on Alibaba.com. Dietary risks from food and drinking water are not of concern. The conclusions were reached on the basis of the evaluation of the representative uses of dimethoate as insecticide on wheat and sugar beet. Available at URL: https://www.epa.gov/pesticidesexternal icon/reregistration/REDs/dimethoate_red.pdf4/20/13. Registrants of dimethoate products will be informed of the specific requirements affecting their product registration(s), as well as of the regulatory options available to them. Active ingredient Dimethoate Brand name(s) Doff Systemic Insecticide Main use Sap-feeding insects Last date of use 31.8.02. As part of the re-evaluation of an active ingredient, the PMRA takes into consideration recent developments and new information on the status of an active ingredient in other jurisdictions, including OECD member countries. There are no outstanding data requirements with regard to environment. DISPOSAL CONSIDERATIONS PESTICIDE DISPOSAL: Pesticide wastes are acutely hazardous. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./ EPA/OPP Chemical Ingredients Database >. Estimated average daily intakes have been below acceptable limits (Gunderson, 1995). Toxicity and Warnings. INSECTICIDE RESISTANCE WARNING For insect resistance management Adama DIMETHOATE 400 INSECTICIDE is a Group 1B insecticide. Examples of organophosphates include Dimethoate, Naled, Trichlorfon, Chlorpyrifos, Fenthione, and Malathion. An evaluation of available scientific information found that, under the current conditions of use: The regulatory approach regarding the re-evaluation of dimethoate was first proposed in the consultation document Proposed Re-evaluation Decision PRVD2011-12, Dimethoate. Dimethoate is used on both agricultural and non-agricultural sites which include feed, food, industrial oil seed and fibre, forestry and ornamental crops. Risk-reduction measures are being implemented to address potential risks identified in this assessment. The revised aggregate acute and chronic exposure (for example, to dimethoate exposure from food and drinking water) accounted for no more than 71% of the acute reference dose and 16% of the chronic reference dose for all population groups. This work plan has been prepared to fulfill new legislative requirements intended to improve the transparency and predictability of chemical review decisions. 1113-02-6 Cygon is the manufacture name for products like Bonide and Hi-Yield. Canada is part of the Organisation for Economic Co-operation and Development (OECD), which assembles member countries as well as provides a forum for which governments can work together to share experiences and seek solutions to common problems. Please see PRVD2011-12 for a detailed description of the dimethoate toxicology assessment. The health effects noted in animals occur at doses more than 100-times higher (and often much higher) than levels to which humans are normally exposed when pesticide products are used according to label directions. High doses of dimethoate, omethoate, and other organophosphate pesticides inhibit acetylcholinesterase enzymes in the nervous system, resulting in excess acetylcholine at nerve terminals. It has also been used as a housefly pesticide and been administered to livestock to kill botflies. The magnitude of effects ranged from 20 hives to 150 colonies, and up to 1256 dead bees. Humans exposed to large doses of an OP (methamidophos, fenthion, dimethoate, monocrotophos, etc.) Dimethoate ... is an indirect-acting anticholinesterase. Dimethoate / Cypermethrin is used for insecticide and other conditions. In Canada, dimethoate is registered to control a wide range of insect pests such as: aphids, beetles, weevils, grasshoppers, flies, leafhoppers, scale insects, thrips, moths and spider mites. In neutral to acidic conditions, greater persistence is noted. For pollinators, risks are mitigated by restricting applications to periods when bees are not actively foraging. When dimethoate is released into the environment, it can enter soil and surface water, where it breaks down rapidly. Also a Metabolite of Dimethoate. Of the twelve incident reports, 10 were possible, one was probable and one was highly probable. Revision 3, 1991-2003, December 2006. Dimethoate is a systemic and contact organophosphorus insecticide registered for use in the U.S. in 1962 and used on several field grown agricultural crops (e.g., leaf greens, citrus, and melons), tree crops, and ornamentals. In animal studies, inhibition of erythrocyte but not plasma cholinesterase appeared to be the most sensitive indicator of dimethoate exposure and toxicity (Sanderson and Edson, 1964; IPCS, 1989). Additional mitigation measures are required to minimize potential exposure and protect worker’s health. The reliable end points, appropriate for use in regulatory risk assessment, are presented. Potential exposure to dimethoate may occur through the diet, when handling and applying the product, or when entering or contacting treated sites. To protect pollinators, dimethoate cannot be applied to blooming crops when bees are foraging. Dimethoate is used to kill mites and insects systemically and on contact. What Additional Scientific Information is Being Requested? Omethoate is about 10 times more toxic and a more potent cholinesterase inhibitor than dimethoate (FAO/WHO, 1997; Hassan et al, 1969). Report of the Joint Meeting of the FAO Panel of Experts on Pesticide Residues in Food and the Environment and the WHO Core Assessment Group. Intensive Care Med 2006;32:464-8. International Programme on Chemical Safety (IPCS). There were also twelve American incident reports involving dimethoate and bee mortality. Details of the supplier of the safety data sheet Of the known areas of the effects, three were a result of on-site application to agricultural areas, orchards or fields, and five were a result of application in the vicinity, indicating spray drift. DIMETHOATE 400 Insecticide PAGE 1 OF 10 ACTIVE CONSTITUENT: 400 g/L DIMETHOATE (an anti-cholinesterase compound) DIRECTIONS FOR USE RESTRAINTS DO NOT use to control pests that are resistant to organophosphorus insecticides as treatment may be ineffective. In plants and in the environment, omethoate occurs as a break down product within a few days after dimethoate application. Biomonitoring data can also help scientists plan and conduct research on exposure and health effects. As a systemic, dimethoate is taken up into the roots of plants and translocated to aboveground parts, where it is toxic to any sucking insect feeding on the plant juices (e.g., aphids, leafhoppers, and thrips). Dimethoate has moderate acute toxicity in mammals (e.g., the LD50 in mice and rats is 150 and 400 mg/kg bodyweight, respectively) (IPCS, 1989). It acts both by contact and through ingestion. Caterpillars and other chewing pests are not killed by dimethoate because not enough juice-containing tissue is ingested to be effective. Workers in treated fields can have exposure to dimethoate, omethoate, or both by skin contact. Dimethoate Insecticides are organophosphate systemic insecticide/miticides for use on fruit and citrus trees, vineyards, nonbearing and nursery stock, commercial pecan production, certain commercial vegetable crops, certain field and seed crops and ornamental plants grown in nurseries. Intermediate syndrome. For dimethoate (USEPA/OPP Pesticide Code: 035001) ACTIVE products with label matches. Neither dimethoate nor omethoate bioaccumulate, but both are highly toxic to honey bees, birds, and freshwater invertebrates (U.S. EPA, 2006). It was introduced in 1956 and is produced in many countries. Dimethoate contributes to insecticide resistance management. Among professional pesticide applicators and formulators, dimethoate exposure can occur by skin contact or from inhaling aerosols or dust. DIRECTIONS FOR USE RESTRAINTS Carcinogenicity studies in animals have been inconsistent, with tumors of spleen, skin, and lymph systems in male but not female rats, and lung tumors and lymphoma in male mice and liver tumors in female mice. Dimethoate is absorbed from the gastrointestinal tract, the lungs, and through the skin. Conditions of registration may include precautionary measures on the product label to further reduce risk. In: Federal Register volume 60, Number 128, July 5, 1995. Detailed information related to Dimethoate's uses, side-effects, reviews, questions, interactions, and precautions is as follows: metabolic fate of dimethoate in the rat. 4/20/13, Food and Agriculture Organization/World Health Organization (FAO/WHO). These methods consider the unique characteristics of sensitive subpopulations in both humans (for example, children), and organisms in the environment (for example, those most sensitive to environmental contaminants). For more information regarding the basis for objecting, please refer to the Pesticides and Pest Management portion of Health Canada’s website (Request a Reconsideration of Decision) or contact the PMRA’s Pest Management Information Service. For enquiries, contact us. the levels where no health effects occur in animal testing and. (3621-04, Dimethoate 400 g/l EC) Contains dimethoate, cyclohexanone, hydrocarbons, C9, aromatics and maleic anhydride 1.2. Serial urine measurements of dimethoate in an adult who mistakenly ingested a large amount of the insecticide revealed an elimination half-life of 23.8 hours and first-order kinetics (Huffman and Papendorf, 2006). The cherry fruit fly has been controlled successfully by Cygon administration. The label for this dimethoate product will be amended to better warn users of the sensitivity some plants may have to dimethoate (see Appendix IV of Re-evaluation Decision RVD2015-04, Dimethoate). As a result, dietary exposure from food and drinking water were not of concern to the PMRA. Some (four) of the reports indicated that beans were the target crop. For this reason, we aimed to further explore DM genotoxicity resulting from subchronic intoxication of experimental mice. “Pick Your Own (PYO)” facilities are commercial farming operations that allow public access for harvesting in large-scale fields or orchards treated with commercially labelled dimethoate products. The following additional key risk-reduction measures are to be implemented: After consideration of all other possible mitigation measures, the following use registrations are to be cancelled due to occupational risk concerns: These uses must be removed from all dimethoate labels. In- sect/mite biotypes with acquired resistance to Group 1B may eventu- ally dominate the insect/mite population if Group 1B insecticides or acaricides are used repeatedly in the same field or in successive years as the primary method of control for targeted species. Precautionary statements to avoid drift to areas of human habitation or areas of human activity are to be added to product labels. Aggregate dietary and drinking water exposure including risk will be mitigated by increasing preharvest intervals (PHI) and reducing maximum application rates. Over the next 50 hours, 97-99% of the ingested dimethoate was recovered as urinary dialkyl phosphate metabolites and <1% as dimethoate (Krieger and Thonginthusak, 1993). Proposed Re-evaluation Decision PRVD2011-12, Protecting Your Health and the Environment. Certain uses of dimethoate products have value in the food and crop industry, and do not pose unacceptable risks to human health or the environment. General Information. 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