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Seasonal Care

Managing the Summer Dearth: Robbing, Stress, and Varroa Risk

After the main nectar flow ends, the hive goes into conservation mode. If you're not ready for it, summer dearth brings robbing frenzies, stressed colonies, and spiking Varroa percentages.

7 min readadvancedsummerAdvanced Course

Most beekeeping attention focuses on spring buildup and fall Varroa treatment. The summer dearth — that stretch of weeks (sometimes months) between the end of the main nectar flow and fall goldenrod or aster — gets less attention than it deserves. It shouldn't. Dearth is when robbing frenzies erupt, weak colonies fail, and Varroa loads quietly surge to dangerous levels. Managing through it well protects everything you built in spring. What Triggers Dearth and How Colonies Respond The main nectar flow in most of North America peaks in late spring to early summer, then ends. In many regions — particularly the mid-Atlantic, Southeast, and Midwest — July and August bring weeks where little to nothing is blooming that produces significant nectar. Forage may be available, but not in the volumes that sustained the spring buildup. The colony responds by shifting from growth mode to conservation mode: Foraging slows. Without a nectar flow, scouts have less to report. Foraging activity drops noticeably. Guard behavior intensifies. Guards become far more suspicious of anything approaching the entrance. Colonies that were docile in May may be short-tempered in July. Population stabilizes or declines. The colony no longer needs to expand to exploit a flow,

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Supering and Managing Honey Supers: Timing, Excluders, and When to Pull

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