Spidend

Application Notes:
Make a hole in the lid and place the cup directly on soil or rockwool slabs
Protect against direct sunlight and water
Do not scatter contents—pupae must remain in the cup to maintain humidity
Leave the cup in place for at least two weeks
Use peel-off label to mark release points
Repeat releases until control is achieved

Dosage
The dosage of Spidend depends on climate, crop and spider mite density and should always be adjusted to the particular situation. Start introduction as soon as the first spider mites are detected in the crop. Introduction rates typically range from 0.25-25 per 10 sq ft/release. Releases should be repeated at least 3 times at weekly intervals, or until the problem is controlled. For expert assistance combatting an active spider mite problem with Spidend, reach out to our live chat in the bottom right hand corner of the site or fill out our contact us form. 

Best Working Conditions
Temperature — Optimal range 68–81°F
Night Temperature — Must remain above 61°F for optimal oviposition
Humidity — High RH (>80%) supports emergence and egg-laying

Compatibility Guidance
Allow residues from oils or soaps to dry before application
For pesticide/chemical compatibility details, check out our Chemical Compatibility page.

Product Specifications
Pack Size — 250 pupae
Presentation — 550 mL plastic cup
Appearance — Dark pupae mixed with carrier; larvae are orange and legless

What to Expect
Adults begin emerging within 24–48 hours after release. Females lay eggs near spider mite colonies, and larvae hatch in approximately 2–3 days under optimal conditions. Once hatched, larvae start feeding immediately on spider mites. Spider mite populations decline rapidly as larvae consume mites in hotspots. Control builds progressively as successive larvae move through affected areas. Continue scouting and reapply as needed to maintain suppression and prevent resurgence.

Recommended IPM Pairings
Spidex Vital — Complements Spidend for layered control and coverage
Isarid® Mycoinsecticide — Adds fungal mode of action for spider mites and other soft-bodied pests
Dune™ — Improves plant resilience against sucking pests through strengthening plant cell walls
Horiver Yellow Sticky Traps — For monitoring secondary pests like thrips and whiteflies
Essential Oil Knockdown (e.g., neem-based) — For pre-release reduction of heavy mite populations; apply after residues dry

FAQs

Can I store this for later?
Long-term storage, i.e. more than 48 hours, is not recommended. Apply promptly after receipt. Our products are shipped fresh for immediate use to ensure maximum performance. If needed, keep in a cool, dark, dry place for up to 1–2 days; longer holding reduces effectiveness and quality.

Does Spidend kill spider mites immediately?
No—Spidend works through larval feeding. Adults emerge within 24–48 hours, lay eggs near spider mite colonies, and larvae begin feeding immediately after hatching. Spider mites are consumed entirely, leaving only the skin behind.

Does Spidend contain adults?
No—Spidend contains pupae. Adults hatch under warm, humid conditions and begin laying eggs near spider mite colonies.

How soon will I see results?
Feeding begins within 24–48 hours of hatching. Larvae feed continuously for 4–7 days and can kill more mites than they consume when populations are high. Visible reduction in spider mite populations occurs rapidly in hotspots.

Can I scatter the pupae over the crop?
No—pupae must remain in the cup to maintain humidity. Scattering reduces emergence and effectiveness.

Can Spidend be used with predatory mites?
Yes—Spidend complements Spidex Vital and other predatory mites for layered spider mite control. Always allow residues from oils or soaps to dry before release and check compatibility charts for chemical sprays.

Why choose beneficial predators?
Beneficial predators provide a sustainable, long-term approach to pest control:

• No resistance issues: Pests cannot develop resistance to natural predators, eliminating the constant cycle of switching chemical products.
• Easy to scale: As plants grow, predator introductions can be increased without overhauling the program, ensuring consistent results and minimal disruptions.
• Cleaner and safer: Replacing chemical sprays reduces pesticide runoff, protects pollinators, and promotes a more natural growing system.
• Superior quality: At Natural Enemies, we are the insectary. Products are held to the highest standards, ensuring vigorous, effective predators that perform reliably in real-world growing conditions.