Nest worms are the larvae of wax borers, belonging to the family Moths, there are two kinds of large and small, on the nest spleen moth moths to eat beeswax, through the tunnel, ruin the nest spleen, damage the pupae, but also damage the beehives. The ability of the bee to resist nest insects is weak, and it is often widely endangered by it, which is a headache in breeding. Zhangzhou City and County have promoted methods such as removing nest boxes, raising strong groups, using new spleens, and manual removal in the prevention and control of nest insects, which have reduced the harm of nest insects to a certain extent, but the effect is not significant. We found from the key spot checks of bee farms in Nanjing County and beekeepers in various villages that the incidence of nest insects is still 43%.
How can nest insects be controlled more thoroughly? Inspired by the method of good effect of mite treatment in the bee breakage stage, the selection of the middle bee breakage stage and the nest worm blooming period, burning sulfur smoke nest spleen and beehive, the nest worm was more thoroughly poisoned, and the repeated test was carried out for two consecutive years, and the effect was very good.
Good. When the queen bee is about to start laying eggs at the end of the autumn period, the nest spleen of each group is extracted 1/2 to 2/3, de-bee, concentrated into the double swarm hive (or the hive box plus the successor box or empty valley cabinet), burning sulfur 50 g smoke nest spleen, poisoning the nest worm, about 0.5 hours later, open the lid of the box and leave it for at least 2 hours, try to let the sulfur smoke and flavor dissipate, in the evening, the spleen is filled with sugar water and put back into the original hive, each spleen is filled with about 0.5 kg of sugar water and 0.5 kg of sugar water. In the evening of the next day, the remaining nest spleens of each group are extracted, and after being treated according to law, they are put back into the hive, and attention is paid to narrowing the nest door to prevent the occurrence of bee theft. On the third day, the hive is blanched with boiling water, or burned with sulfur smoke and other methods for strict treatment, and all are replaced. After treatment by this method, the winter breeding to the winter honey stage, completely control the nest insect damage, the effect is better, see Table 1.
As can be seen from Table 1, the colony reproduction rate in group A was 1.64 times higher than in the control group.
Although some of the bees in fujian overwintering bee colonies have broken off, the nest insects have formed cocoons and overwintered, are in a dormant state, do not endanger the bee colony, and do not have to be prevented. Wax borers only appear in March to April, and under the condition of external temperatures of 25 to 35 ° C, it takes about 6 to 7 weeks to complete a generation. The low temperature in the first half of the year makes the wax borer larvae stagnant, the calendar period is long, the number of generations is reduced, the insect population is very small, and the harm is not obvious; in the summer, autumn and early winter, the temperature is high, and there are many nest insects of the second and third generations, which is the peak period of nest insect activity and harm to bee colonies. The bee colony stops eggs in the autumn and enters the breeding period in late autumn and early winter, and the first batch of seeds is used to replace the old bees after hibernation, which is of particular significance, but due to the serious harm of nest insects, there are very few new bees feathered, so that the bee colony progresses slowly, or even from strong to weak. In the initial egg stage after the breakage, burning sulfur for a more thorough smoking, combined with spleen reduction and feeding, is indeed a major technical measure to accelerate reproduction, cultivate strong groups, and seize a bumper harvest of winter honey. This method also greatly reduces the number of nest insects overwintering, greatly reduces the harm of nest insects in the second year, and is of great significance for the production of beekeeping.
Although the bees can accept the sulfur taste, but there are certain limits, the bee colony can not change the spleen at once, it is more secure to divide into 2 spleen changes, otherwise, it is very easy to escape. According to the above method, sometimes there are still individual bee colonies fleeing, and attention should be paid to prevention. Only deal with the nest spleen does not change the box, the box gap has wax borer eggs, larvae, but also on the spleen hazard, timely cleaning and replacement of the hive prevention and control effect is better, we have replaced all 32 swarms of bees with the treated nest spleen, the hive but not disinfected, to the beginning of October inspection, 113 boxes there are 97 boxes of nest worms, of which the more serious 26 boxes, placed in the sun to expose 1 066 nest worms.
Bee colonies continue to grow in autumn, and the use of strong herd feeding cannot resist the harm of the upper spleen of nest insects. We have selected 7 groups of 33 box bees as a group, and another group of 7 groups of 17 box bees as another group for comparison, from the August fixed group observed that on October 2, the spleen and spleen of the large group suffered severely from nest insect damage; the weak group only occurred in 3 groups, and it was mild. It shows that the size of the group does not affect the harm of nest insects. Constantly sub-colonies, the prevention and control of nest insects can take tightening the spleen, feeding a large amount of sugar, causing honey pressure on the spleen, unfavorable nest worm upper spleen activity, combined with changing boxes, and then with the development of the bee colony, as appropriate to create a spleen or add a spleen to expand the group, the effect is good. Bee colonies with serious damage from nest insects should resolutely withdraw all nest spleens, extract eggs and spleens from other groups for replenishment, and combine cleaning the hive.
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