The hot summer has arrived, affected by the high temperature, the honey source plants in many areas have entered the depletion period, and the bee insect infestation has become more abundant. For the beekeepers who raise bees, there is a big problem that the harm of nest insects is particularly serious in the summer, improper management, and it is easy to breed nest insects on the nest spleen in the bee colony, resulting in the collapse of the whole group and causing a lot of economic losses. Below, Xiaobian will tell you how to avoid the harm of nest insects.
First, the introduction and harm of nest insects
Nest insects are larvae of wax borers belonging to the family Lepidoptera and Moths. Wax borers are not directly harmful to the swarm, but if you find wax borers around the hive, you should be very vigilant, the nest spleen in the swarm may have grown nest worms.
Adults of wax borers
Nest insects grow very quickly, will spit silk on the bottom of the nest and the wall of the nest room as a cocoon, and in the nest spleen to break the nest spleen, moth the wax on the nest spleen, endangering a large number of bee caps. In severe cases, "white-headed pupae" appear in more than 80% of the area of the covered spleen, and the young bees that are barely feathered will also be trapped in the nest room due to the silk thread at the bottom of the room.
The larvae of the wax borer - nest worms
Nest spleens and bee caps that are infested by nest worms
Second, the drugs that can be used to control nest insects
1. Common bee drugs on the market
There are usually two kinds of bee drugs for the treatment of hive worm disease in the bee drug market: one is the nest worm clear wood chips, when the bee colony is used, the bee colony should be withdrawn from the production period, and the appropriate dose is taken according to the group situation and hung in the hive; the other is the biological agent Thuringiensis, which can be sprayed directly with water on the surface of the nest spleen or added when the nest foundation is pressed.
2. Fumigation of chemical substances
Drugs with good effects for fumigation to kill nest insects are: sulfur, carbon disulfide, ethylene oxide, aluminum phosphide, calcium phosphide, dibromoethylene and formic acid, which should be used according to the colony situation and the degree of nest insect harm.
Third, how to avoid nest insect harm
1. Strengthen the management of bee colonies
Cultivate strong flocks, make bees dense, keep more bees than spleens, let bees protect the nest spleen, do not give female adults the opportunity to lay eggs after wax, and do not leave room for nest worms to live. The nest spleen can not be used for too long, and the old nest spleen should be eliminated regularly with the new nest spleen and the nest foundation. The old spleen that has been eliminated should be dealt with and melted in time, and cannot be left idle, otherwise the wax borer will lay eggs on it. The nest spleen to be stored should also be sealed tightly after fumigation.
It is also necessary to regularly clean the wax chips on the inner wall of the hive, the wax chips at the bottom, the eggs of the nest worms, the pupae, etc. Clean at least once every 20 days.
Nest spleen that is idle in the hive that is endangered by nest worms
2, use some physical methods to kill nest insects
(1) Pull out the nest spleen that is harmed by the nest insect and align it with the light source, you can find the moth channel of the nest insect, and use tweezers to clip out the nest insect along the moth channel.
(2) 10% of the brine can be poured into the nest spleen harmed by the nest worm, and the body of the nest worm can be shaken out after 1 hour of standing.
(3) Extract the nest spleen that is harmed by the nest insect and expose it to the sun for 15-20 minutes, and the nest worm will crawl out on its own, and after crawling out, the nest worm will be eliminated in time.