40% dimethoate emulsifiable concentrate, registered for eight targets: cotton aphids, cotton mites, rice leafhoppers, rice stem borers, rice planthoppers, tobacco budworms, tobacco aphids, and sweet potato weevils.
I'm sorry, but the Chinese text you provided ("八行里，") appears to be incomplete — it's only a few characters and doesn't form a complete paragraph. Could you please provide the full Chinese paragraph you'd like me to translate?Cotton, rice, tobacco, sweet potato—Only four crops. And the very first item in the precautions states:
请提供需要翻译的中文段落。Use is prohibited on vegetables, melons and fruits, tea, fungi, and Chinese medicinal herb crops.
This limitation is the starting point for understanding this product.
Dimethoate belongs to the organophosphate class and has moderate toxicity. It is prohibited for use on vegetables, melons and fruits, tea, fungi, and Chinese herbal medicines, and the reasons involveResidue and dietary risk请提供需要翻译的中文段落。
These crops are characterized by:Short harvest period, suitable for direct consumption or near-direct consumption.Vegetables may be harvested only a few days after pesticide application, fruits and melons are often consumed fresh immediately after picking, and tea leaves are directly brewed. The target of organophosphates in the human body is acetylcholinesterase, and excessive residues pose a clear health risk.
Therefore, prohibition is a regulatory red line, not a recommendation.
Cotton (for fiber), rice (hulled and processed), tobacco (combusted and inhaled, not ingested), and sweet potato (partly used as feed)—these crops have different dietary exposure pathways and are permitted for use.
Product Performance:
This product belongs to the organophosphate class of pesticides and isSystemic contact insecticide and acaricide请提供需要翻译的中文段落内容。
Three characteristics:
Systemic + contact.The insecticide has both contact insecticidal action and systemic translocation within the plant. This makes it effective against pests hidden on the underside of leaves and within leaf rolls.
It also exhibits acaricidal activity."Mites" are registered on cotton, which is not common among organophosphates.
Mechanism of actionInhibits insect acetylcholinesterase, causing acetylcholine to accumulate at synapses, leading to disrupted nerve conduction and death.
Cotton aphids, mites: 75-100 ml/mu.
Aphids and mites both feed on the underside of leaves, and systemic activity allows the pesticide to translocate from the upper leaf surface to the lower surface.
Rice leafhoppers, stem borers, and planthoppers: 75–100 mL/mu.
Three pests, one dosage. On rice, these pests occur at different stages (leafhoppers and planthoppers from tillering to heading, and stem borers at tillering and booting), so in practice, applications are made separately according to when each pest occurs.
Tobacco budworm and aphids: 50–100 mL/mu.
The dosage range for tobacco is wider (50-100 vs. 75-100). The tobacco budworm is a chewing lepidopteran larva, while the aphid is a piercing-sucking insect; the two differ in their sensitivity to insecticides, and the range provides room for adjustment.
Sweet potato weevil: Use a 2000-fold dilution to soak fresh sweet potato slices for trapping and killing.
This is among the eight registrations.The only different application methodInstead of spraying the crops, the pesticide is used to soak potato chips to make bait for trapping and killing adult insects.
The principle of trap-killing methods.: Adult sweet potato weevils feed on tuber pieces. By using pesticide-treated tuber slices as bait, the adults are induced to actively feed and become poisoned. This method requires an extremely small amount of pesticide (only a few tuber slices) and does not contaminate the soil or the tubers themselves.
It is highly toxic to the stomachs of cattle and sheep.Note 3:
This product has relatively high stomach toxicity to cattle and sheep.Green manure and weeds that have been sprayed with pesticides must not be fed within one month.请提供需要翻译的中文段落内容。
This one is very specific: one month. Organophosphates require time to degrade within the plant; if herbicide-treated weeds are fed to livestock, they can cause poisoning.
Toxic to bees, fish, and silkworms.(Although the full list of precautions is not provided here, this generally applies to organophosphates.)
Do not mix with alkaline pesticides.Dimethoate decomposes and loses efficacy under alkaline conditions.
Precaution 2: "This product is an organophosphorus pesticide. It is recommended to rotate with insecticides having different modes of action."
The resistance problem of organophosphates has become very serious in many regions of China (aphids, planthoppers, and striped stem borers have developed resistance to multiple organophosphates).
Realistic rotation direction请提供需要翻译的中文段落。
- Neonicotinoids (imidacloprid, acetamiprid, thiamethoxam)
- Pyrethroids (beta-cypermethrin, lambda-cyhalothrin)
- Insect growth regulators (buprofezin, pyriproxyfen)
- Diamides (chlorantraniliprole)
But note thatThe resistance issue of neonicotinoids in some regions is equally prominent; rotation requires an overall plan rather than simply "switching to another variety."
The pre-harvest interval of dimethoate varies among different crops and must be determined according to the product label. The intervals for cotton and rice are relatively long (typically around 30 days for rice), which determines the timing of the final application.
Applications per seasonSimilarly, the label must be checked; the application frequency limits for organophosphates are usually stricter.
Two-stage dilutionEmulsifiable concentrate should first be diluted with a small amount of water, then the remaining water volume should be added. Pouring it directly into a full bucket of water will result in uneven dispersion.
Wear protective equipment.Emulsifiable concentrates have a defatting effect on the skin, and prolonged contact may cause dermatitis. Protective clothing, gloves, and masks are necessary.
Cleaning after pesticide applicationThoroughly wash hands, face, and exposed skin with soap and clean water.
Residual spray solution and empty containersDo not pour into ditches or rivers; dispose of properly.
