Hi folks Can any one tell what scale insects on Nephrolepis fern [ Boston fern] are indicating. This is a crop grown under cover harvested all year round and in about the 3 rd year scale insects appear. This crop is 3rd generation biodynamic is sprayed with potentised preps monthly. I have used Glens pest off spray 2-3 times and yet the scale insect continues to spread. There must be a stronger force at work any thoughts please would be most welcome. I need to keep this crop going for a least another 6 months. as we are renown for top quality crops i would like to solve this problem.
Thankyou Tony Robinson Rambler FLowers New Zealand
