Swarms of Midges Disrupt Visitors at the Osaka World Expo

The World Exposition in Osaka, a vibrant celebration of culture and innovation, has recently faced a rather unpleasant surprise: swarms of midges. These tiny flies have been making a significant impact on the experience of visitors, drawing attention to not only their annoyances but also potential health concerns.

The Infestation

As visitors navigate the expansive grounds of the expo, many have expressed their dismay over the sheer number of midges populating the venue. These small insects have set up camp on walls and the pillars of the wooden Grand Ring, a central attraction encircling numerous pavilions. For many, the experience has turned from one of excitement to one of discomfort, as people find themselves dodging the flies to avoid swallowing them while enjoying their meals.

Visitor Reactions

Toma Masatani, a 23-year-old graduate student visiting from Saitama, shared his personal experience, exclaiming, “It shocked me when they landed on the bread I was eating. There are so many of them around, and it’s disgusting.” His reaction encapsulates the sentiments of many who have found the presence of midges not only annoying but potentially off-putting to their dining experiences.

Health Concerns

While these midges do not bite, their presence is a source of concern for health experts. Dead midges can trigger asthma and allergic reactions if inhaled, prompting caution, particularly among vulnerable populations. Koichiro Kawai, a professor emeritus at Hiroshima University with expertise in these insects, advised that wearing a face mask is prudent for those with respiratory issues.

The Source of the Problem

Experts believe that the midges are emerging from the Water Plaza located in the southern part of the expo site, where seawater is stored. This potential marine origin raises questions about their lifecycle and persistence, with Kawai suggesting these swarms could continue until the end of autumn.

Mitigation Efforts

In response to the growing swarms, the expo organizers are taking proactive measures. They have begun spraying insecticides in areas where midges are prevalent, treating spots prone to collecting rainwater with growth inhibitors, and installing insect repellent lights to deter the pesky flies. These efforts aim to ensure that the expo remains a pleasant experience for all visitors.

Osaka Governor Hirofumi Yoshimura has also stepped in to address the issue, reaching out to the insecticide manufacturer Earth Corp. for assistance. The company has expressed its commitment to utilize its expertise in mitigating the midge problem, stating, “We will fulfill our role of contributing to the expo’s success by utilizing the knowledge and technology we have cultivated.”

Conclusion

As the World Expo continues, the presence of midges serves as a reminder of the complexities of hosting such large-scale events. While the excitement of cultural exchange and innovation is palpable, the challenges posed by these small insects highlight the need for continuous management of the environment to protect visitor experiences. The ongoing efforts to combat the midge populations underscore a cooperative approach in the face of an unexpected issue.