Nectar dearth and summer stress
Many of us are in a summer nectar dearth or are fast approaching one. Several things happen to your bees when days are hot and forage is scarce. Here is a list of management ideas that will make the summer less stressful for you and for them.
- Honey bees short on water may decide to try the neighbor’s swimming pool or bird bath. Since this can put a strain on the relationship, put out some water for your bees. A bird bath with rocks, a bucket with a wet rag, or a drip irrigation line can all be used to slack the bees’ thirst.
- Your bees may seem testy or even aggressive when you go near. Even though your colony was docile as a newborn babe up till now, it may suddenly seem hostile. This is natural when supplies of food and water start running low. Don’t go routing around inside your hive looking for what’s wrong. The way they see it, you are what’s wrong. Give them some space during this time, and they will resume their sweet dispositions when the days cool.
- Beware of robbing bees. Bees from robust colonies may decide that the easiest way to stock the pantry is to steal supplies from a weaker hive. If you see evidence of robbing—bees wrestling on the landing board or fighting in the air—reduce the entrances of weak hives. This may seem counter-intuitive during a hot spell, but it could save your colony.
- Provide lots of ventilation. Bees cool the interior of the hive by fanning, but for fanning to work, the air needs a place to come in and a place to go out. Since you may be reducing your entrance to prevent robbing, it is extra important to use a screened bottom, a screened inner cover, a slatted rack, or a small upper entrance.
- Robbing bees are not the only critters on the prowl this time of year. Hornet and wasp populations peak in the autumn just when the honey bees are having a tough time finding forage. These predators love a weak honey bee colony because the adults can get honey for themselves and nice juicy bees for their offspring. Be careful not to spill honey near a hive and do not use entrance feeders. Small drips can bring hoards of predators to feed on your bees—another reason to keep those entrances small.
- Beware of the Varroa mite population. With diminishing forage and shorter days, your colony will raise less brood and evict the drones. Overall, the colony size will decrease. The Varroa mites, however, remain strong. Without drone cells available they will use worker cells, and since the colony has fewer brood cells than before, the mites will cram themselves into the remaining cells. Varroa can easily overwhelm a colony this time of year, so it’s a great time for a sugar roll and mite count.
- Bearding is common on hot summer days. Although new beekeepers often confuse bearding with swarming, they are not at all related. Bearding bees are merely gathering outside the hive to keep themselves cool and to lessen the heat load on the inside of the hive. The best you can do for them is make sure the hive has good ventilation. Other than that, don't worry.
- Experienced beekeepers have been through summer dearth before, but many newbee colonies are lost during the first nectar dearth that comes along. Why? Because the colony seems so robust and busy, it is hard to imagine things could change that fast . . . but they do. So be on the lookout for signs of summer stress and take steps to help your colony through it. A little bit of prevention goes a long way.