Amblyseius Andersoni Slow-Release Prevention Sachets

Andersoni is a polyphagous predator, meaning it eats a wide variety of pests. It is particularly valuable for controlling microscopic mites that other predators miss.

• Primary Targets: Two-Spotted Spider Mites, Hemp Russet Mites, Broad Mites, and Cyclamen Mites.
• Secondary Targets: Thrips larvae (first instar), Whitefly eggs, and pollen.
• Micro-Mite Control: Because Andersoni is slightly smaller than other predators, it is excellent at hunting the tiny Russet and Broad mites that hide in plant crevices.

This is the most adaptable mite in our lineup, thriving in conditions that would stress other species.

• Temperature: Active between 43°F - 100°F (6°C - 38°C). Ideally 68°F - 77°F.
• Humidity: Requires moderate humidity (above 40–50% RH). It is more forgiving of dry air than Persimilis but less drought-tolerant than Californicus.
• Food Source: Can survive on pollen and fungal spores for weeks without prey, making it ideal for preventative sachets.

Andersoni sachets are not available at the moment. Here is how the slow-release options we do have compare, so you can pick the closest fit.

• Choose Special Blend (The Ultimate Shield): The closest replacement for Andersoni's all-round role, and what we would hang for total peace of mind on high-value crops. This sachet contains three different predators (Californicus, Swirskii, and Cucumeris) to maintain a defense against Thrips, Whiteflies, Spider Mites and the micro-mites simultaneously.
• Choose Californicus (The Hot & Dry Specialist): If your grow room is consistently hot (80°F+) and humidity is low. Californicus survives drought-like conditions better than anything else we carry, and it takes spider, broad and cyclamen mites. It does little for thrips.
• Choose Limonicus (The Cool Room Choice): If what you valued about Andersoni was that it kept working when the room cooled. Limonicus stays active in a cool, less humid house — but its targets are thrips and whitefly rather than spider mites.
• Choose Persimilis (The High-Humidity Specialist): If you are maintaining a crop with a history of Spider Mites in a humid environment. Persimilis is a more aggressive feeder than Andersoni was, but it is strictly for Spider Mites and cannot survive if humidity drops.

Important Note: Sachets are for prevention. If you already have webbed plants or a heavy infestation, sachets are too slow. You need to use Loose Mites (bottles) for immediate knockdown.

Our sachets are mini-breeding systems that release fresh predators over 4–6 weeks.

• Placement: Hang 1 sachet every 3–5 linear feet along crop rows, or roughly 1 per large plant. Place them in the middle-to-upper canopy where pests are most likely to travel.
• DO NOT OPEN: Never tear or cut the sachet open. The paper packet is a breeding nursery designed to release mites slowly through the pre-punched hole. If you open it, you destroy the colony and lose the slow-release benefit.
• Handling: Hold the sachet by the cardboard hook or tab. Do not squeeze the belly of the sachet, or you will crush the mites inside.
• Maintenance: Do not spray water directly onto the paper sachet, as it can drown the colony. Mist the leaves around it instead.
• Timing: Replace sachets every 4 weeks to ensure continuous protection.

Packaging: Sold in boxes of paper sachets containing a bran/vermiculite carrier and a food source (feeder mites) to sustain the colony during transit.

Viability: You will not see massive movement inside the sachet immediately, as the population breeds inside.

Storage: Hang immediately. Do not refrigerate sachets, as the condensation can ruin the paper and kill the colony. Store at 55–60°F for no more than 24 hours if necessary.