One, the flies eggs reside on the upper top inch of soil in your office plants. You can scrape this upper top layer of soil with a latex glove or paper towel and discard it off your property. Please do not use insecticides, because this could be harmful to everyone in your office, particularly to pregnant women and employees with allergies.
Two, we at PDI use biological controls such as predatory nematodes, microscopic "wormlike " animals that feed on the fungus gnat eggs. By using biological controls such as live nematodes you break the cycle of life for the fungus gnats, and begin a most pleasant life in your office workplace. We started using these safe techniques 20 years ago in the Boston, MA.
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