Dimethoate

Action/Use:

Acaricide/Miticide
;
Insecticide

Use: For aphids, mites, planthoppers, thrips, whiteflies on alfalfa, apples, corn, cotton, grapefruit, grapes, lemons, melons, oranges, ornamentals, pears, pecans, safflower, sorghum, soybeans, tangerines, tobacco, tomatoes, watermelons, wheat, and other vegetables. Residual wall spray in farm buildings for flies.

Identification

Common Name(s): Dimethoate (ANSI, ISO, BSI, JMAF, ESA); ; Fosfamid (USSR)

Chemistry

Class: Organophosphate.

Properties: White crystalline solid, mercaptan odor. Melting point 45�-48�C. Highly soluble in chloroform, methylene chloride, benzene, toluene, alcohols, esters, ketones. Slightly in xylene, carbon tetrachloride, aliphatic hydrocarbons.

Mode of Action / Resistance Management

Chemical Group: Organophosphate

Mode of Action: Acetylcholine esterase inhibitor

Action Group: IRAC Group 1

Registration

U.S.A.: U.S. EPA has cancelled all uses.

Environmental Guidelines

Hazards: Fish: LC₅₀ 30.2 mg/l (rainbow trout). Bee: LD₅₀ (24 h) 0.12 �g/bee (topical)

Water Solubility: 2.5% at 21�C

Safety Guidelines

Signal Word: WARNING

Toxicity Class: II

Toxicity: Tech: (Rat): Oral LD₅₀ 235 mg/kg. Dermal >400 mg/kg

Handling/storage Cautions: Harmful or fatal if swallowed, inhaled, or absorbed through skin. May cause eye irritation. Avoid eye, skin, clothing contact. Wash thoroughly after handling. Do not breathe dust. Use with adequate ventilation. Repeated careless use may cause cholinesterase inhibition. Biological activity remains practically unvaried for 2 years under environmental conditions if stored in unopened, undamaged original containers, in shaded, cool, well-aired places, inaccessible to animals and unauthorized persons. Recommended temperature <25�C. Crystals may form in formulations stored at <0�C. Stable for minimum of 1 year at <25�-30�C. Will decompose rapidly when heated to temperatures above 80�C and explosion may be induced. Never heat above 35�C and local heating should be avoided. Stack containers to permit air circulation at bottom and inside of piles. Do not contaminate food or feed

Spill Control/cleanup: Liquid spillage should be dammed-off and pumped into containers; soak up remainder with absorbent material and dispose of in accordance with local regulations. Solid spillage should be picked up with an industrial vacuum cleaner and disposed of in accordance with local regulations

Product/waste Disposal: Dispose of by special means (suitable incineration, etc.) in accordance with local regulations

Protective Clothing: Chemical-resistant gloves. Chemical-resistant footwear plus socks. Approved respirator.

Suppliers and Branded Products

Basic Producers:

Agrinoon Enterprise Limited

Agriphar S.A. (Chimac* Dim, Dimate*, Dimezyl*)

Agro-Care Chemical Industry Group Limited (Agrodime*, Dimecare*, Lago*)

AgroDragon Co., Ltd. (Lego*)

Agsin Pte. Ltd. (Fezmet*, Trounce*)

AnHui JuKai Agrochemical Co., Ltd.

BASF Corporation (Bi 58*, Perfekthion*, Rebelate*, Roxion*)

Beta Chemicals Ltd.