Effective against Pulvinaria soft scales, woolly beech aphid and woolly apple aphid
What does EXOCHOMUS QUADRIPUSTULATUS look like?
The predatory ladybird EXOCHOMUS QUADRIPUSTULATUS is native to the Netherlands. They are about 4-5 mm in size and black with four red dots on the cover shields. The front two dots are kidney– or comma-shaped. The larvae are gray and can be covered in white wax that comes from the wax filaments of their prey, the Pulvinaria scale. The eggs are deposited in the egg masses of Pulvinaria scale or within woolly apple aphid colonies. The eggs are elongated and have a yellow to orange colour.
How does EXOCHOMUS QUADRIPUSTULATUS work?
The larvae and beetles eat woolly soft scales, woolly beech aphid and woolly apple aphid. The females deposit eggs inside egg masses of Pulvinaria scales. The larvae not only eat the Pulvinaria scale eggs, but also both small and large soft scales are eaten. Under laboratory conditions, 7899-9424 horse chestnut scale eggs were eaten by EXOCHOMUS QUADRIPUSTULATUS. At higher temperatures even more prey are consumed. Ten days after reaching the adult stage, ladybirds eat 120 horse chestnut scale nymphs per day at 20°C/14°C (16 hours day/8 hours night). Especially the females require a lot of proteins because they have to lay eggs. As a result, you can imagine that because of their large appetite, the plague diminishes visibly.
When can EXOCHOMUS QUADRIPUSTULATUS be applied?
EXOCHOMUS larvae can be used to control Pulvinaria spp. in lawn trees, shrubs or garden plants like hydrangea. Also, woolly apple aphid (Eriosoma lanigerum), wolly beech aphid and Pulvinaria in orchards can be controlled with EXOCHOMUS QUADRIPUSTULATUS. Furthermore, application in indoor plantings against Pulvinaria scales is possible. Read more about this prodct here.
Other products against Pulvinaria soft scale and woolly aphids
– Many different soft scale species
– Many different aphid species