Divide the plant if desired and place in a clean pot with fresh medium. Insects are most active during the warm summer months. Get into the habit of looking at your plants. Inspect the undersides as well. As temperatures increase, good air movement is important to your orchid plants.
Healthy orchids are more resistant to pests and diseases.
Remove dried sheathing on cattleyas to rid of hiding places for insects. You may find an occasional insect on one of your plants, but this is not cause for panic. Separate the plants from the others and treat it appropriately. Early inspection of your plants will locate those stray insects and allows you to take action before it becomes a problem throughout your entire collection. A large percentage of orchid problems are caused by either too much or too little water.