Tropicals & Tender Perennials: Diseases, pests,... of Hoyas, data collection thread, 0 by PanamonCreel

PanamonCreel wrote:
1. Name of disease: sun burn
2. Type of disease: environmental
3. Effected parts of Plant: Leaves
4. Type of damage: Yellow, brown areas on leaf/leaves, secondary fungal infections
5. Possible root cause: overexposure to direct sunlight, sudden change in sun exposure
6. Recommended cures/remedies:move plant or find ways to reduce direct exposure to sunlight

Many hoyas will get a redish coloration on leaves when exposed to direct sunlight (sun tan of hoyas) and coloration will reverse to green when direct sunlight exposure is reduced. Overexposure will burn the leaves irreversible and fungal infection will occur on the damaged section in high humidity enviroments. Also sudden changes from low light locations to direct sunlight locations can cause sunburn as the leaves do not yet have their natural "sun tan" (like we humans). Gradually adjust your plants to higher light conditions to allow them to build up their sun "defenses".




This message was edited Dec 2, 2004 8:52 PM