How to eliminate phorid flies?

How to eliminate phorid flies?

The key to eliminating phorid flies is to find and remove the breeding source — spraying without removing the source will only result in more flies emerging from the decaying matter.

Step 1: Find and remove the source

Phorid fly larvae grow in decaying organic matter; the breeding site must be eliminated:

• Start with garbage bins — dispose of kitchen waste daily; wash and dry the inside of the bin.
• Check the kitchen sink drain — grease and food residue buildup in pipes is the most common breeding source; disassemble the trap and clean it, or pour boiling water down the drain.
• Also check floor drains and drain openings; scrub off the slime.
• Damp mops and cloths are easily overlooked breeding sites — wring them out and hang them up after use.

Step 2: Spray insecticide

After removing the breeding source, spray dinotefuran-containing household insecticide to kill remaining adults:

• Focus on areas near garbage bins, sinks, and around drainpipes.
• Also spray walls and countertops where phorid flies frequently land.
• Once dry, the insecticide forms an invisible film; phorid flies that crawl over or land on it die. Residual effect lasts 2-4 weeks.

Step 3: Daily prevention

• Use garbage bins with lids; do not leave kitchen waste overnight.
• Clean sink strainers daily; do not wash food debris down the drain.
• Flush drains with boiling water weekly to prevent debris buildup.
• Wring out mops and cloths and hang them to dry.

Effectiveness

Removing the source combined with environmental spraying usually brings the situation under control within a few days. Spraying alone without source removal will not solve the problem.