BeneficialBlack bean aphid

Aphid parasitoid wasp for black bean aphid

Aphidius colemani · parasitoid wasp

Against black bean aphid

Black bean aphid is not on Koppert's list for this wasp, but lab studies show colemani stings it and develops inside it. Black bean aphids can carry the symbiont Hamiltonella defensa, which protects them against parasitoids, so results are less reliable than on melon or green peach aphid. Treat it as a greenhouse supplement, with the gall midge on established colonies; outdoors, rely on wild hoverflies and ladybirds.

Rate0.25–4 /m² per release, under glass only

TimingWhen black bean aphid colonies appear in a greenhouse or tunnel

Temperature18–25 °C best; falls off above 30 °C

macro · aphid parasitoid wasp on black bean aphid

The pestBlack bean aphidAphis fabaeDense black colonies on shoot tips, curled leaves, honeydew, poor pod setFull pest profile →

Before you order

Released preventively under glass from soon after planting; for the small aphids — green peach, melon and tobacco aphid. How it works, how to tell it has established and the supplier list are on the full Aphidius colemani profile.

Release calculator

How many do I need?

Area and infestation level in; quantity, cost and a weekly schedule out. Open the calculator →

Will it survive my spray?

Pesticide sensitivity

Check anything applied in the last month before releasing. Check a product →

Other controls for black bean aphid

HoverfliesWild predator (larvae) · Wild — attract adults with open flowers
LadybugsWild predator · Nothing to release — conserve the ones already there
Aphidoletes aphidimyzaPredatory midge · 1–10 /m² per release, weekly
Chrysoperla carneaGreen lacewing larvae · 2–20 /m² per release, weekly