Name: Save The Grapes! Enter The Mealybug Destroyer! | Deep Look
Uploaded: 2025-12-02T12:12:23.000Z
Duration: 3 min 58 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

What do this animal and this one have in common?

Covered in waxy fuzz and cuddling in a clump, these mealybugs don't look all that dangerous.

But they can spread a virus that causes grape leafroll, a disease that can take out a whole vineyard.

And getting rid of the ruinous mealybug is no small feat.

Because they come with henchmen, this one gets paid in poop.

The ants drink up this sweet, sticky excrement called honeydew, and in return, provide bodyguard services.

See how they give their little sugar babies a tap to get the goods.

Here's our hero now, coming out of a box that a farmer ordered online last week for this very purpose.

These lady beetles demolish mealybugs when they can escape the wrath of the ant bodyguards.

Ready to go undercover to carry out the mission.

As larvae, the mealybug destroyer excretes waxy filaments from pores on its back.

The mealybug destroyer larva slips past the watchful gaze of the bodyguard ants and dines to its heart's content, munching on eggs and guzzling buggy innards.

Just try to find the Destroyer in this cotton candy pile.

But when the Destroyer molts, she has to shed her disguise and reproduce waxy threads, leaving her vulnerable to ants.

In its short lifetime, a destroyer can gorge on hundreds of mealybug nymphs or more than 1,000 mealybug eggs.

But once they're in a vineyard, mealybugs are nearly impossible to eradicate.

And with each new mealybug comes the threat of that disease.

It blocks a plant's ability to convert sunlight into nutri.

One tiny mealybug can acquire and transmit the virus that causes it within an hour.

And in their smallest stages, they are tiny.

So tiny that farmers might move them around the vineyard without even knowing it.

There's no cure for the disease, so farmers have no choice but to pull out sick vines and get new ones.

But those plants might be harboring tiny mealybugs or grape leaf world disease.

This hero is trained to sniff sniff out the vine mealybug and leafroll disease, helping farmers know which new plants are safe for their vineyards.

In initial trials, dogs were able to find leafroll disease more than 93% of the time and mealybugs a whopping 97% of the time.

And like a fine wine, the dogs get better at detection with time.

One hero fights with the mouth, the other the nose.

When it comes to saving grapes, these two are a superb pairing.

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And while you're here, watch our video about two other skilled hunters, the dragonfly and the damselfly.