
Dimethoate 40% EC (Emulsifiable Concentrate)
Pre-Harvest Interval (PHI): The interval between the last spraying and harvest varies depending on the crop and climatic conditions — typically 2 to 3 weeks.
Product name: Dimethoate 40% EC (Emulsifiable Concentrate)
Trade Name: Dimethoate
Group: Organophosphate
WHO Toxicity Class: II – Toxic and Harmful
Type: Systemic insecticide with contact and ingestive (stomach) action
Pre-Harvest Interval (PHI):
The interval between the last spraying and harvest varies depending on the crop and climatic conditions — typically 2 to 3 weeks.
Application Management:
- Dimethoate is an acetylcholinesterase inhibitor, producing a rapid knockdown effect and maintaining systemic activity for up to 14 days.
- It is used primarily at the first appearance of pests and is effective against a wide spectrum of insects, including aphids, scales, dipterans (flies), caterpillars, beetles, and mites.
- It is recommended for crops such as cereals, cotton, grapes, sugar beet, coffee, potatoes, tobacco, vegetables, lawns, tea, olives, and various fruit trees and citrus.
Compatibility and Mixing Guidelines:
- Avoid use on stone fruit trees (e.g., peach, plum, apricot).
- When applied according to recommendations, phytotoxicity (plant injury) is unlikely; however, certain varieties of lemon, peach, fig, olive, tomato, bean, and cotton are sensitive to Dimethoate.
- It may cause russeting (roughening or browning) on Red Delicious and Golden Delicious apples and ornamental plants.
- Compatible with most commonly used insecticides and acaricides.
Target Crops and Application Rates:
| Crop | Pest | Application Rate | Application Method |
| Cereals | Common green aphid | 1 L/ha | Foliar spray |
| Cotton | Thrips | 1 L/ha | Foliar spray |
| Sugar beet | Leafhopper (vector of curly top virus) | 1 L/ha | Foliar spray |
| Alfalfa | Stem nematode | 1 L/ha | Foliar spray |
| Temperate fruit trees | Scale insects | 1 L per 1000 L water | Foliar spray |
| Soybean | Aphids, thrips, and other sucking insects | 1 L per 1000 L water | Foliar spray |
Notes:
- Avoid application during high temperatures or drought stress.
- Do not mix or apply with alkaline pesticides.
- Follow safety measures to prevent exposure, as organophosphates are toxic to humans and beneficial insects.




