Tony, IF you have 75 orchids, you are doing a lot of things RIGHT! I think your main problem is not knowing what you are doing right and what you might be doing wrong. Is that correct?
Give me more information about your growing conditions and what you primarily grow. Include light, air movement, watering/fertilizing schedule, fertilizer dosage, potting media, pots or mounts, and temperature variations.....well just everything you can think of. What makes you think you have a pest problem?
Keep in mind that I am simply a hobbyist orchid grower and happen to have a (tiny) tropical plant business (to keep me occupied when I retired three years ago). Thus, you will get information from a non-expert here (from me, not ATP).
I feel quite sure you could ask a dozen of us here the same questions and would get a dozen different answers.
