Should I remove leaves with white spots?

Written by
Nguyen Minh
Reviewed by
Prof. Charles Hartman, Ph.D.White leaf spots on plants can indicate greater problems. The best way to get rid of them is to prune all infected leaves immediately; the new leaves will continue to grow and not be affected. The quicker you take action the better, as I did not take action right away on a leaf of my monstera and, in one night, the infection spread to 3 of my other plants. Use disinfected shears to prune. Properly dispose of your debris so the infection does not spread. Your action is saving that entire plant at the moment.
Pruning Protocol
- Cut 1 inch below affected area into healthy tissue
- Angle shears to shed water away from wound
- Disinfect tools between each plant
Debris Disposal
- Seal leaves in plastic bags immediately
- Never compost diseased plant matter
- Burn severely infected material where legal
Tool Sterilization
- Soak tools in 1:9 bleach solution for 10 minutes
- Rinse thoroughly to prevent corrosion
- Oil metal parts after drying to prevent rust
Leaving infected foliage poses a risk to whole collections. One client's greenhouse for orchids lost 40 plants because bacterial spots went undetected. It's essential to inspect plants on at least a weekly basis to detect this issue at the early stage so that you will see the tell-tale white markings. Please make sure to quarantine new plants for at least 14 days, and always sanitize your shears...as it could save or doom multiple species.
Appropriate disposal techniques mitigate soil contamination. An instance of buried infected leaves surfacing in a garden I consulted on in my educational agency. But municipal waste systems contain infected materials in such a way that pathogens are secured. The first is for minor outbreaks: heat sealed plant bags in the microwave setting for 2 minutes to neutralize spores before trashing them.
You should maintain your instruments in the same manner as surgical instruments - commit certain sheer pruners to diseased plants. Place sterilized tools in organization kits that include silica packs in sealed containers. You should be changing your blades following ten uses. Your vigilance allows the safeguard against obscure opportunists.
Read the full article: White Leaf Spots: Causes and Solutions