Emergency Insect Care During Power Outages and Disasters | Temperature Management and Backup Power for Beetles and Stag Beetles

Risks of Power Outages on Insect Breeding

Sudden power outages caused by typhoons, earthquakes, or large-scale blackouts pose serious risks for insect breeders. Japanese beetles and stag beetles are cold-blooded animals that are directly affected by ambient temperature. In particular, high temperatures in summer and low temperatures in winter can be deadly.

When air conditioning shuts down during summer power outages, indoor temperatures can reach close to 40°C, causing fatal damage to adults within hours and to larvae and pupae within ten-plus hours. Conversely, during winter power outages, temperatures can drop near 0°C, and exotic species from tropical and subtropical regions face the risk of freezing to death.

This article explains preparations before power outages and emergency measures to take after they occur.

Summer Power Outage Measures: Preventing Heat-Related Deaths

Immediate Response (0-2 Hours After Power Outage)

1. Close curtains and open windows: Block direct sunlight and use natural ventilation to slow the rise in room temperature
2. Position ice packs around the enclosure: Place ice packs wrapped in towels beside or on top of the enclosure. Avoid direct placement as it can cool too rapidly.
3. Prioritize pupae and pre-pupae enclosures: Individuals undergoing metamorphosis are most vulnerable to temperature changes, so prioritize cooling these enclosures first.
4. Move to cooler locations such as basements or entryways: In apartment buildings, utilize rooms on the north side, areas near elevator lobbies, or other places with minimal temperature fluctuations.

Available Backup Power Sources

• Portable power stations (capacity 300Wh and above): Can power USB fans or small circulation fans. Can also be used to operate wine coolers (power consumption 50-80W) for short periods.
• Generators: The most reliable option for extended power outages. Must be installed outdoors due to noise and exhaust concerns. Difficult to use in apartment buildings.
• Vehicle cigarette lighter socket (AC converter): Can be used to recharge batteries while away or manage in-car temperature (caution in summer).

Summer Tolerance Time Guidelines

※These are merely guidelines. Times can vary significantly depending on humidity and individual condition.

Winter Power Outage Measures: Preventing Cold-Related Deaths

Differences Between Japanese and Exotic Species

• Japanese beetles and stag beetles (larvae): Most species can tolerate temperatures down to around 10°C during room-temperature rearing. Japanese giant stag beetles and similar species undergoing overwinter management at room temperature (around 15°C) are less affected by power outages.
• Exotic tropical and subtropical species (Hercules, rainbow stag beetles, etc.): Prolonged exposure to temperatures of 18°C or below causes reduced activity, and temperatures of 10°C or below pose deadly risks.

Winter Emergency Response

1. Store enclosures in polystyrene boxes: These provide excellent insulation and can maintain temperature differences from ambient air for several hours.
2. Use disposable hand warmers: Place them inside the polystyrene box outside the enclosure, not inside the enclosure. Avoid sealing too tightly to prevent oxygen depletion.
3. Wrap with blankets or cardboard: Effective as emergency temporary insulation.
4. Portable power station + panel heater (power consumption 20-40W): With a portable power station of 300Wh or more, you can maintain heat for 6-10 hours.

Portable Power Station Capacity Guidelines

Pre-Preparation Checklist

Power outages occur without warning. Advance preparation of the following items can minimize damage.

Tools and Supplies

• Keep a portable power station (300Wh or higher recommended) fully charged and stored
• Store multiple ice packs in the freezer
• Prepare polystyrene boxes (large enough to fit enclosures)
• Stock disposable hand warmers by the box
• Install thermometers and temperature/humidity data loggers in each breeding area

Review of Breeding Environment

• Identify the location of pupae and pre-pupae enclosures and prioritize them
• Separate storage locations for exotic tropical species and Japanese species
• Know the "maximum tolerable power outage time" for each species during summer and winter

Information Gathering

• Install your local power company's app for quick power outage information
• Note the power consumption of wine coolers and incubators (for calculating backup power capacity)

Emergency Contacts and Information Resources

• Power company outage information (official apps and websites)
• Portable power station and generator rental services (for extended outages)
• Temporary boarding services at nearby pet shops or specialty insect stores (as a last resort)

Summary

Power outage response for insect breeding comes down to "advance preparation" and "clear prioritization." By setting treatment priorities in the order of pupae and pre-pupae → exotic tropical species → Japanese species, and keeping portable power stations, ice packs, and hand warmers on hand, you can avoid fatal damage in most cases.

In Japan, which experiences frequent natural disasters, power outages from summer typhoons and winter heavy snow are especially likely during their respective seasons. Before the peak season, check your emergency supplies and verify the battery level of your backup power.