I've been in the greenhouse business close to 10 years and never had an issue with scales until now. I have a mild infestation on some citrus tree I received. Any advice?
Neem Oil works well for scale on Citrus as long as you apply in the evening or on an overcast day, (it can burn foliage if allied too heavy in hot sun...). And you have to love the very short reentry time if you are using it in a retail space.
I have used the light horticultural oil sprays in the past and they work well. These are not the "dormant oil sprays" that can be used only certain times of the year. These can be used any time with proper precautions.
Thanks for the advice!