As well as their armour, making them even more impervious to sprays, there are a couple of other things different about these little suckers and the soft scales.
They don’t leave honey dew ( apparently because their huge mouths make them much more efficient feeders ) but they do need males to mate - although they don’t hang around for long.
Typical you say ?
Well that’s not really fair, they cannot feed, and have just a day to get on with the job so to speak.
That’s even worse than just “15 minutes” of fame, although hopefully they enjoy it more !
Anyway, it must be a successful system, as these insects can breed three or four generations a year, rapidly reaching infestation levels if not stopped.
As with all scales - and mealybugs for that matter - it’s our own fault if they are in our glasshouse or conservatory, we almost certainly brought them in on a plant or cutting.
Doesn’t that just cheer you up no end to hear - particularly if you are now infested !
Well, if you have got them, our little wasps will not really be very good at dealing with them because of their armour.
But Nature has a cunning plan !