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IBMA h-bug

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Dusky Ladybird

ScymnusAsmallLarva2
Larvae of Scymnus have a mealy bug like appearance
btn order   Scymnus loewii – Dusky LadybirdDusky.pdf

The Dusky Ladybird is a small predatory ladybird. It is primarily an aphid predator, however it will also predate on a large variety of alternative prey, including psyllid and whitefly eggs, mites, and the eggs of larger insects such as butterflies and moths. 

The Dusky Ladybird appears to survive well in glasshouse grown capsicums when feeding on the peach aphid, and colonises cucumber as well. The use of this species is still experimental, and there are no guarantees that they will colonise your crop or eat a particular aphid species. They are known predators of aphids from the genera Myzus and Aphis.

In New Zealand we call them ladybirds, much the same as the British do, however in other parts of the world they are known as ladybugs.
 

The Pest – Aphids (as well as Psyllids)

Many different species of aphid are present in New Zealand, and not all species are necessarily suitable prey for the Dusky Ladybird. Some aphid species are quite specific to particular crops, while other species infest a wide range of crops.

Aphids are soft-bodied insects that have globular bodies, long thin legs and antennae. Adult body length is normally 2-3 mm, and colour varies from pale yellow, green to dark brown or black. Some forms have wings and they can disperse rapidly.

Under optimum conditions, the life cycle of an aphid can be completed in 10-12 days. Many species reproduce asexually, and therefore populations can build up very rapidly.

Aphids feed with piercing-sucking mouthparts and can cause stunting and distortion, especially to younger leaves. Aphids are often plant virus vectors, and therefore rapid and effective control is essential to minimize crop losses.

Symptoms and signs of aphids include:

  • Stunting and distortion of the leaves and flowers
  • Yellowing and wilting of leaves
  • Honey dew and sooty mould present on the plants
  • Aphids visible on the stem, leaves and flower buds

The Solution – Dusky Ladybird

The Dusky Ladybird is a small predatory ladybird  3-4 mm in length.

Adults and juveniles are aphid predators, feeding on aphids of all life stages. Larvae paralyse aphids and suck their body fluids out, generally through a leg or antenna. 

Both adults and larvae predate on the tomato/potato psyllid, both eggs and juveniles.

The Dusky Ladybird undergoes an egg stage and 4 larval stages before pupating and emerging as an adult. Development time from egg to adult takes around three weeks at 25⁰C, and longer at lower temperatures. Eggs hatch approximately 2-3 days after dispatch, and juvenile stages will begin searching for aphid prey almost immediately.

Eggs are tiny and laid singly on the woodier parts of the plant.

Our ladybirds are reared in our insectary, we do not collect ladybirds from the wild (for sale) as is practised in other parts of the world.
 

Price

PRICE: $15.00 per 100 eggs (minimum order) plus GST and Freight

About us

We rear and sell biological control agents, the good guys, for the control of plant pests and diseases. Bioforce advocates the sustainable management of horticultural crops.
 

Testimonials

“We'd love to get feedback regarding our products, services, and the use of biological control. Please email us with you're comments using the email address to the right” 
 
Bioforce Team
 

Contact Details

Ph: (09) 294 8973
Fax: (09) 294 8978
office@bioforce.net.nz
Address: P.O Box 73,
Drury 2247,
New Zealand