Keeping stingless bees through a tropical dry season

Stingless bees are tropical animals, so the question is never whether they survive the climate but which half of the year is easy and which needs attention. In southern Vietnam the year splits cleanly, and each half sets a different problem.

What changes in the dry months

From roughly December to April, sun is intense and flowering thins out. Colonies naturally contract, which is not a fault. Two specific threats account for most losses in this period.

Threat one: heat

Stingless bee wax is blended with resin and softens at high temperature. A box in direct midday sun can reach a point where honey pots slump and the nest collapses. When that happens the colony leaves, sometimes within one afternoon.

The fix is shade during the ten-to-three window. Natural tree shade is best because it stays ventilated. A built roof should sit at least ten centimetres above the lid so there is an air gap; a metal sheet resting directly on the box is worse than no roof at all.

Threat two: ants

Dry ground sends ants looking for water and sugar, and a stingless bee nest is an ideal target. Stand each leg of the hive stand in a cup of water, or apply a grease band. In dry weather the cups evaporate within days — check weekly. One empty cup is enough.

Never spray insecticide near the hive. Stingless bees are more sensitive than honey bees, and the spray kills the colony faster than the ants would.

Water

Provide a shallow water source with pebbles or floating material nearby so bees do not have to travel far. This reduces stress and keeps foragers closer to home.

Feeding: last resort only

If flowering fails completely and a colony is clearly starving, light sugar water placed outside the box can carry it through. Stop as soon as flowering returns, and never feed a colony whose honey you intend to sell.

What not to do

Do not open boxes for inspection during the hottest months. Every opening raises internal temperature at exactly the wrong time. Read the entrance instead.

Frequently asked

My colony has shrunk over the dry season. Is it sick?

Usually not. Contracting with forage is normal. Worry only if numbers fall sharply alongside ants in the box or an unusual smell.

How much shade is enough?

Shade from about ten in the morning to three in the afternoon. Early and late sun is fine and even helpful.

Can I move a colony somewhere cooler?

Only carefully — stingless bees navigate by landmarks and moving a box a few metres loses foragers. Move under a metre at a time, or over three kilometres.