Reading the Azatin O Label Before Mixing
The numbers on the jug are worth having in front of you. Azadirachtin is the active ingredient at 4.5 percent, which works out at 0.39 pounds, or 175 grams, of azadirachtin per US gallon of product. Other ingredients account for 95.5 percent. The EPA registration number is 70051-9-59807 and the signal word is CAUTION. The re-entry interval is four hours. The rate is 4 to 16 fluid ounces per 100 gallons of water. That goes on every seven days, tightening to every three or four where pressure is heavy. The OMRI listing covers use in organic production. OHP also ask growers to spray a small area first, because phytotoxicity cannot be ruled out across every species and condition.
How an Azadirachtin Growth Regulator Behaves
This works differently from a knock-down spray and the difference shapes how it is judged. The compound interferes with moulting, so larvae never reach a reproductive adult stage. Death can take three to ten days after application, which reads like failure to anyone watching for corpses. Feeding stops long before that, so the damage to the crop halts almost immediately even while the insects are still present. Treat that lag as expected rather than as a problem. The practical consequence is that it belongs in a programme rather than in an emergency. It goes on before a population is established, and it is rotated with materials that hit adults. A growth regulator by definition does very little to an insect that has finished growing. It is compatible with most beneficial insects; run a small trial in a given release programme.
Key Features
- Active ingredient: Azadirachtin at 4.5 percent, derived from neem seed
- Concentration: 0.39 lb, or 175 grams, of azadirachtin per US gallon
- Other ingredients: 95.5 percent of the formulation
- EPA registration: Number 70051-9-59807, with a CAUTION signal word
- Re-entry interval: Four hours from the end of the application
- Rate: 4 to 16 fluid ounces per 100 gallons of water
- Interval: Every seven days, or every three to four under pressure
- Mode of action: An insect growth regulator that disrupts moulting
- Organic use: OMRI Listed for use in organic production
- Before spraying: Trial a small area, since phytotoxicity cannot be ruled out
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 882832 |
| Brand | OHP |
| Pack size | 1 quart |
| Active ingredient | Azadirachtin |
| Active percentage | 4.5 percent |
| Loading | 175 g, or 0.39 lb, per US gallon |
| Other ingredients | 95.5 percent |
| EPA registration number | 70051-9-59807 |
| Signal word | CAUTION |
| Restricted entry interval | 4 hours |
| Label rate | 4 to 16 fl oz per 100 gallons of water |
| Spray interval | Every 7 days, or every 3 to 4 days under high pressure |
| Type | Insect growth regulator, biological |
| Organic status | OMRI Listed |
| Beneficials | Compatible with most beneficial insects; trial first |