| Acute LD50 | Acute LD50 | Vapor | Application | |
| (technical mg/kg) | (technical mg/kg) | Toxicity | Rates | |
| Oral | Dermal | (ppm) | Kg ai/ha | |
| FUMIGANTS | ||||
| --HALOGENATED HYDROCARBONS | ||||
| Methyl Bromide | - | - | 200 | 100-900 |
| Telone II | 200-500 | - | 500 | 50-1800 |
| Chloropicrin | 250 | - | 50-1000 | |
| Carbon Disulfide | - | - | 200 | 2800-5000 |
| --METHYL ISOTHIOCYANATE LIBERATORS | ||||
| Vapam | 1700 | - | - | 125-400 |
| Vorlex | 538 | 470-961 | - | |
| NONFUMIGANTS | ||||
| --CARBAMATES | ||||
| Temik | 0.9 | 5-12.5 | 0.5-12 | |
| Vydate | 5.4 | 2960 (F) | - | |
| Carbofuran | 11 | 10,200 | 0.5-12 | |
| --ORGANOPHOSPHATES | ||||
| Dasanit | 2-10 | 3-30 | 1-23 | |
| Mocap | 61.5 | 2.4 | 1.2-42 | |
| Nemacur | 8.1-9.6 | 178-225 | 3.5-7 |
This table summarizes information on the relative acute toxicity of nematicides and use rates which is available in the literature.
Typically larger amounts of fumigants are needed relative to organophosphates and carbamates.
Relative acute toxicity is measured in terms of LD50 for the Lethal Dosage required to kill 50 percent of a test organism.
For example, consider the LD50 of the following nematicides:
Nematicide A LD50 = 2 mg/kg
Nematicide B LD50 = 20 mg/kg
Nematicide C LD50 = 200 mg/kg
The higher the LD50, the less acutely toxic is the product. Nematicide A would be more acutely toxic than Nematicide C. Note that the oral LD50 of the fumigants is generally higher than for the organophosphates and carbamates, and therefore, the acute toxicity is generally less. Also, note that LD50 provides no information on other factors of importance in comparing the relative safety of nematicides or other pesticides such as chronic toxicity, mutagenicity, or carcinogenicity.