Do Fruit Flies Like Watermelon

Fruit flies like watermelon, and it’s actually one of their favorite foods in the summertime.
 
If you’ve ever left a slice of watermelon sitting on a picnic table and came back to find tiny flying insects swarming it, you already know the answer.
 
In this post, we’ll look at why fruit flies like watermelon, what draws them to it, and how to keep them away from your fruit.
 

Why Fruit Flies Like Watermelon

Fruit flies like watermelon for several reasons, and once you understand those reasons, it becomes much easier to keep them away.
 
Here’s why watermelon attracts fruit flies so easily.
 

1. Watermelon Is Packed With Sugar

Watermelon is loaded with natural sugars like fructose and glucose.
 
Fruit flies are drawn to sugar because it’s a quick source of energy for them.
 
The sweeter the fruit, the more likely fruit flies will find it irresistible.
 
That’s why fruit flies like watermelon more than many other fruits.
 

2. High Moisture Content

Watermelon is about 92 percent water.
 
Fruit flies love moisture because they need it to survive and reproduce.
 
A juicy slice of watermelon provides plenty of liquid, which makes it a perfect breeding ground.
 
Female fruit flies can lay hundreds of eggs on moist, sugary surfaces like watermelon.
 

3. Strong Fermentation Aroma

As watermelon sits out, it starts to ferment.
 
Fermentation produces alcohol and acetic acid, which fruit flies can smell from far away.
 
Fruit flies are actually attracted to the smell of fermentation because it signals food.
 
This is why overripe watermelon attracts even more fruit flies than fresh slices.
 

4. Yeast on the Surface

Fruit flies feed on yeast that grows on fruits, including watermelon.
 
When watermelon is cut, yeast from the air lands on the juicy surface and starts multiplying.
 
Fruit flies love yeast because it’s a protein-rich food source.
 
That’s why fruit flies like watermelon so much, it gives them both sugar and protein.
 

Do Fruit Flies Actually Eat Watermelon?

Yes, fruit flies do eat watermelon, but not in the way you might imagine.
 
Fruit flies don’t have teeth, so they can’t chew the fruit.
 
Instead, they sponge up liquids from the watermelon’s surface.
 
They also lay eggs on the fruit, and the larvae feed on the soft flesh once they hatch.
 
So when you ask do fruit flies like watermelon, the answer is a strong yes.
 
They don’t just like it, they thrive on it.
 

Fruit Flies and Watermelon Rinds

Fruit flies are also drawn to watermelon rinds.
 
The rind holds moisture and often has bits of sugary flesh stuck to it.
 
If you throw watermelon rinds into an open trash can, fruit flies will find them fast.
 
Compost piles with watermelon scraps are another common hotspot.
 

Fruit Flies and Watermelon Juice

Even watermelon juice left on a counter or in a glass can attract fruit flies.
 
A single spill can become a feeding ground for dozens of fruit flies within hours.
 
That’s because fruit flies reproduce incredibly quickly, with a full life cycle in just about a week.
 

How to Keep Fruit Flies Away From Watermelon

If fruit flies like watermelon, you need a strategy to keep them away.
 
Here are the most effective ways to protect your watermelon from fruit flies.
 

1. Refrigerate Cut Watermelon

The easiest way to keep fruit flies off watermelon is to refrigerate it.
 
Fruit flies are less active in cold temperatures.
 
Store cut watermelon in an airtight container in the fridge.
 
That keeps fruit flies from landing on it and laying eggs.
 

2. Cover Watermelon at Outdoor Events

If you’re serving watermelon outside, cover it with a mesh screen or lid.
 
This keeps fruit flies from landing on the fruit while still letting you enjoy the party.
 
Don’t leave watermelon sitting out for more than two hours.
 
After that, fruit flies will find it, and bacteria will start to grow.
 

3. Clean Up Crumbs and Juice

Wipe down counters, tables, and floors after cutting watermelon.
 
Rinse out glasses and bowls right away.
 
Take out the trash regularly, especially if it contains watermelon rinds.
 
Fruit flies lay eggs in hidden spots, so cleaning thoroughly matters.
 

4. Use a Simple Fruit Fly Trap

You can make a fruit fly trap with apple cider vinegar and a few drops of dish soap.
 
Pour the mixture into a small bowl and leave it near the watermelon.
 
The fruit flies get attracted to the vinegar and drown in the soapy liquid.
 
This works because fruit flies like fermented smells just as much as they like watermelon.
 

5. Store Watermelon Whole and Uncut

A whole, uncut watermelon is much less attractive to fruit flies.
 
The rind protects the sugary flesh inside.
 
Once you cut it open, the clock starts ticking.
 
So keep watermelon whole until you’re ready to eat it.
 

So, Do Fruit Flies Like Watermelon?

Fruit flies like watermelon, and they’re drawn to it because of its sugar, moisture, fermentation aroma, and yeast.
 
They eat the juicy flesh, lay eggs on it, and reproduce quickly when watermelon is left out.
 
The good news is you can keep fruit flies away from watermelon by refrigerating it, covering it, cleaning up spills, and using a simple trap.
 
So if you’ve been wondering do fruit flies like watermelon, now you know the answer, and you also know exactly how to protect your watermelon from them.