Summer is a time when fungal infections can quickly spread through your orchids. Fungi thrive in warm, humid conditions which coincidentally are the same conditions that most orchids need to survive. So, whether you are a greenhouse grower or your orchids are grown outside, you need to be vigilant about watching for the first signs of an infection. If left untreated, a fungus can kill your plants. But don’t worry, follow these instructions below to help detect, treat and prevent to bring your plants back to good health.
Let’s talk about the most common types of fungi that may impact your orchids:
Botrytis causes small brown spots on your flowers, ruining an otherwise beautiful flower. As the fungus spreads, you will notice more spots that are larger in size.
Use a fungicide such as Physan 20, Daconil, Thiphanate Methyl according to the product directions. For a less toxic option, you may also use Hydrogen Peroxide in a spray bottle. You should know that spraying a fungicide will help control the fungal problem, but may also spot a flower or brown the edges.
Improve the air circulation around your plants and remove dead plant materials (expired blooms, old pseudobulbs and dead leaves). Avoid watering flowers, and water early in the morning to allow plenty of time for excess water to be absorbed or evaporated. Also, monitor night temperatures and avoid dips below 60 degrees when possible.
We hope you never find evidence of these fungal infections among your orchids. However, know that if you do catch it early, you can save your plant before it is too late.
Remember to keep a clean growing environment, remove dead plant debris, allow for proper air circulation and water plants early in the morning. These simple suggestions will help keep the fungi away.
Happy Blooming from Better-Gro!