A Comprehensive Guide to DDVP (Dichlorvos)

Basic Information

Product Name: DDVP (Dichlorvos)

Active Ingredient: Dichlorvos (DDVP)

CAS Number: 62-73-7

Molecular Formula: C₄H₇Cl₂O₄P

Target Pests: Flies, mosquitoes, cockroaches, aphids, thrips, stored grain pests (weevils, beetles, moths), ticks, lice, and various agricultural insects.

Applicable Scenarios: Agriculture, horticulture, public health, stored product protection, livestock farms, and environmental sanitation.

Product Characteristics

DDVP is a highly volatile, broad-spectrum organophosphorus insecticide and acaricide, classified as a cholinesterase inhibitor. Its rapid action stems from both contact exposure and fumigant properties—volatile vapors penetrate pest habitats, ensuring efficacy even against hidden insects. With high vapor pressure, it disperses quickly in air and across surfaces, making it ideal for enclosed spaces.

While widely applicable, DDVP requires careful handling: it exhibits moderate toxicity to mammals (acute oral LD₅₀ for rats: 50–100 mg/kg) and high toxicity to fish and bees, necessitating strict adherence to application guidelines to minimize non-target impacts.

Features of Emulsifiable Concentrate (EC) Formulation

The EC formulation of DDVP is a high-efficiency delivery system, comprising the active ingredient, organic solvents, and emulsifiers. When diluted with water, it forms a stable emulsion, offering several advantages:

• High concentration: Allows low-volume application, reducing transportation and storage costs.

• Rapid volatility: Enhances fumigant action, reaching pests in cracks and crevices.

• Excellent surface spread: Ensures uniform coverage on foliage, stored goods, and hard surfaces.

• Equipment compatibility: Works with standard sprayers, foggers, and misting systems.

• Low residual: Degrades quickly in sunlight and air, reducing long-term environmental persistence—suitable for pre-harvest use on crops.

EC formulations are versatile, used in farms, warehouses, households, and public spaces.

Combination Formulation Strategies

To combat pest resistance and expand control spectra, DDVP is often formulated with other active ingredients:

• DDVP + Cypermethrin: Targets cockroaches and flies in public health, combining DDVP’s fumigant action with cypermethrin’s residual contact activity.

• DDVP + Thiamethoxam: Enhances efficacy against aphids and thrips in agriculture, leveraging systemic and contact modes.

• DDVP + Abamectin: Controls mites and leaf miners on vegetables, addressing both chewing and sucking pests.

• DDVP + Deltamethrin: Effective for livestock pest management (ticks, lice), offering prolonged protection in barns.

Each combination optimizes pest specificity and reduces resistance risk.

Mode of Action

DDVP acts by inhibiting acetylcholinesterase, an enzyme critical for breaking down the neurotransmitter acetylcholine in insect nervous systems. This inhibition causes acetylcholine accumulation, leading to continuous nerve impulses, muscle spasms, paralysis, and death.

Its dual action—contact toxicity (killing on direct surface contact) and fumigant effect (via inhaled vapors)—ensures comprehensive pest control. Additionally, DDVP degrades rapidly in the environment (half-life: 1–7 days in soil; hours in water), minimizing long-term accumulation.

Application Scenarios and Usage

1. Stored Product Protection

Target Pests: Grain weevils, flour beetles, grain moths, and warehouse beetles.

Dosage: 10–20 g/m³ of DDVP 80% EC, applied as a surface spray or fog in storage bins.

Notes: Ventilate stored areas before accessing; avoid direct contact with food products.

2. Public Health & Sanitation

Target Pests: Mosquitoes, house flies, cockroaches, and bed bugs.

Dosage: 0.2–0.5% solution (DDVP 50% EC diluted with water), applied via foggers or sprays in kitchens, hospitals, and waste areas.

Notes: Remove pets and food before application; re-enter after 2–4 hours of ventilation.

3. Agricultural Crops

Target Pests: Aphids, whiteflies, armyworms, and leafhoppers on vegetables, fruits, and cereals.

Dosage: 1–2 kg/ha of DDVP 80% EC, sprayed during early pest infestations.

Notes: Avoid application during flowering to protect pollinators; adhere to pre-harvest intervals (PHI: 3–7 days).

4. Livestock Farms

Target Pests: Ticks, lice, and stable flies.

Dosage: 0.1% solution (DDVP 50% EC) sprayed on animal housing surfaces; avoid direct contact with livestock.

Notes: Repeat every 7–10 days during peak infestations.

Company Advantages 

TIanyi is a leading provider of high-quality DDVP products, with strengths including:

• Certified Facilities: ISO 9001:2000 accredited production lines ensuring consistent quality.

• OEM/ODM Services: Custom formulations and branding to meet client specifications.

• Competitive Pricing: Cost-effective solutions without compromising efficacy.

• Custom Packaging: Flexible options from small bottles to bulk tanks.

• Regulatory Support: Assistance with registrations, including ICAMA certification for global markets.