The nest worm is one of the most dangerous pests that threaten bee colonies. These parasites primarily feed on the bee's gland and stingers, which can significantly hinder the growth of the colony and even cause bees to abandon their hives. As a result, the remaining bees may not survive the winter due to cold exposure. During the winter season, nest worms often remain in the form of eggs inside the hive, making them more vulnerable to elimination. Therefore, taking timely action to destroy these eggs during this period can greatly reduce the infestation.
One effective method is to freeze the brood combs. Studies have shown that exposing the brood to temperatures between -7°C and -8°C for 5 to 6 hours can effectively kill all stages of the nest worm, including eggs, larvae, and pupae. This makes winter an ideal time for such treatment. The process involves placing 8 to 9 brood combs in a staggered manner in a cold outdoor area, allowing them to be exposed overnight. This simple yet powerful technique can drastically reduce the worm population before they become active again.
Another method is carbon disulfide fumigation. This chemical is highly effective at eliminating all life stages of the nest worm, including adults, eggs, larvae, and pupae. Once properly applied, it can provide long-lasting protection if no new infestations occur. To implement this, group 5 to 6 brood boxes together, place 8 to 9 combs in each box, and cover them with a large plastic bag made from new plastic film. Seal one end of the bag and insert a small dish or container at the top. Pour approximately 200 ml of carbon disulfide solution into the container—calculating about 3 to 4 ml per box. Then, carefully seal the top of the bag. It is essential for the operator to wear proper protective gear and avoid inhaling the gas to prevent poisoning.
These methods, when used correctly, can help beekeepers protect their hives from nest worm infestations, ensuring healthier and more productive bee colonies throughout the year.
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SJ700~SJ1800/SJ 2000
III)SULZER
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