Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: aphids

Will Milkweed Bugs Eat Aphids?

Yes, milkweed bugs feed on oleander aphids. This is a large milkweed bug (Oncopeltus fasciatus) with an aphid. (Photo by Kathy Keatley Garvey)

Yes, they will! Milkweed bugs gained the nickname of "seed eaters" for primarily eating the seeds of milkweed. Actually, they are opportunistic and generalists, says Hugh Dingle, emeritus professor of entomology at the University of California,...

Yes, milkweed bugs feed on oleander aphids. This is a large milkweed bug (Oncopeltus fasciatus) with an aphid. (Photo by Kathy Keatley Garvey)
Yes, milkweed bugs feed on oleander aphids. This is a large milkweed bug (Oncopeltus fasciatus) with an aphid. (Photo by Kathy Keatley Garvey)

Yes, milkweed bugs feed on oleander aphids. This is a large milkweed bug (Oncopeltus fasciatus) with an aphid. (Photo by Kathy Keatley Garvey)

Let's Hear It for Biocontrol, Integrated Pest Management

An assassin bug drills a pest, a spotted cucumber beetle. (Photo by Kathy Keatley Garvey)

Let's hear it for biocontrol. You've seen lady beetles, aka ladybugs, preying on aphids. But have you seen an assassin bug attack a spotted cucumber beetle? No? How about a crab spider munching on a stink bug? All biocontrol, part of integrated pest...

An assassin bug drills a pest, a spotted cucumber beetle. (Photo by Kathy Keatley Garvey)
An assassin bug drills a pest, a spotted cucumber beetle. (Photo by Kathy Keatley Garvey)

An assassin bug drills a pest, a spotted cucumber beetle. (Photo by Kathy Keatley Garvey)

A lady beetle, aka ladybug, snares an aphid. (Photo by Kathy Keatley Garvey)
A lady beetle, aka ladybug, snares an aphid. (Photo by Kathy Keatley Garvey)

A lady beetle, aka ladybug, snares an aphid. (Photo by Kathy Keatley Garvey)

A crab spider munches on a stink bug. (Photo by Kathy Keatley Garvey)
A crab spider munches on a stink bug. (Photo by Kathy Keatley Garvey)

A crab spider munches on a stink bug. (Photo by Kathy Keatley Garvey)

A great blue heron engages in a little pest management: it catches a rodent at Bodega Bay. (Photo by Kathy Keatley Garvey)
A great blue heron engages in a little pest management: it catches a rodent at Bodega Bay. (Photo by Kathy Keatley Garvey)

A great blue heron engages in a little pest management: it catches a rodent at Bodega Bay. (Photo by Kathy Keatley Garvey)

The great blue heron gets its prey in position before swallowing it whole. (Photo by Kathy Keatley Garvey)
The great blue heron gets its prey in position before swallowing it whole. (Photo by Kathy Keatley Garvey)

The great blue heron gets its prey in position before swallowing it whole. (Photo by Kathy Keatley Garvey)

Kill That 'Alligator-Looking" Critter? No, Don't!

An adult lady beetle (aka ladybug) and a larva. (Photo by Kathy Keatley Garvey)

"Yecch! What's that ugly bug? Kill it!" Have you ever heard anyone say that when they see the larva of a lady beetle (aka ladybug, family Coccinellidae)? Unfortunately, it's quite common among non-gardeners and non-insect enthusiasts. The larvae of...

An adult lady beetle (aka ladybug) and a larva. (Photo by Kathy Keatley Garvey)
An adult lady beetle (aka ladybug) and a larva. (Photo by Kathy Keatley Garvey)

An adult lady beetle (aka ladybug) and a larva. (Photo by Kathy Keatley Garvey)

Close-up of a larva of a lady beetle (aka ladybug). (Photo by Kathy Keatley Garvey)
Close-up of a larva of a lady beetle (aka ladybug). (Photo by Kathy Keatley Garvey)

Close-up of a larva of a lady beetle (aka ladybug). (Photo by Kathy Keatley Garvey)

Larva of a lady beetle (aka ladybug) eating an aphid. (Photo by Kathy Keatley Garvey)
Larva of a lady beetle (aka ladybug) eating an aphid. (Photo by Kathy Keatley Garvey)

Larva of a lady beetle (aka ladybug) eating an aphid. (Photo by Kathy Keatley Garvey)

Posted on Tuesday, June 4, 2019 at 5:09 PM

The Enemy of the Gardener

Oleander aphids clustering on a milkweed stem. (Photo by Kathy Keatley Garvey)

Aphids, don't you just hate them? Especially those oleander aphids that suck the very lifeblood out of our milkweed plants that we're struggling to save for monarch butterflies. Just call aphids "The Enemy of the Gardener" or "The Enemy of the...

Oleander aphids clustering on a milkweed stem. (Photo by Kathy Keatley Garvey)
Oleander aphids clustering on a milkweed stem. (Photo by Kathy Keatley Garvey)

Oleander aphids clustering on a milkweed stem. (Photo by Kathy Keatley Garvey)

Aphids magnified on a Leica DVM6 microscope, operated by Lynn Epstein, UC Davis emeritus professor of plant pathology.
Aphids magnified on a Leica DVM6 microscope, operated by Lynn Epstein, UC Davis emeritus professor of plant pathology.

Aphids magnified on a Leica DVM6 microscope, operated by Lynn Epstein, UC Davis emeritus professor of plant pathology.

Posted on Friday, September 28, 2018 at 4:00 PM

The Incredible Aphid-Eating Machines

Lady beetle larva dining on aphids on milkweed, UC Davis campus. (Photo by Kathy Keatley Garvey)

Just call them the "incredible aphid-eating machines." That would be the lady beetles, commonly known as ladybugs (although they are not bugs; they're beetles belonging to the family Coccinellidae, and they're not all "ladies"--some are male!). How...

Lady beetle larva dining on aphids on milkweed, UC Davis campus. (Photo by Kathy Keatley Garvey)
Lady beetle larva dining on aphids on milkweed, UC Davis campus. (Photo by Kathy Keatley Garvey)

Lady beetle larva dining on aphids on milkweed, UC Davis campus. (Photo by Kathy Keatley Garvey)

A lady beetle, aka ladybug, tracks down more prey. (Photo by Kathy Keatley Garvey)
A lady beetle, aka ladybug, tracks down more prey. (Photo by Kathy Keatley Garvey)

A lady beetle, aka ladybug, tracks down more prey. (Photo by Kathy Keatley Garvey)

Posted on Thursday, August 30, 2018 at 5:38 PM

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