Orchid Pests and Diseases

Fungal Disease: Botrytis | Series 4

Posted by Team Orchid-Tree on

Botrytis causes small brown rotting spots on orchid blooms when the air is cool and damp, as well as locations with poor air circulation and limited sunlight. Petal blight typically is not fatal to plants, but it commonly ruins the look of affected flowers.  Botrytis fungi produce spores, and they are moved into place by wind and rain and are most aggressive after long periods of wet weather. Disturbing infected plants may release spores into the surrounding growing area.  Symptoms Damp conditions, rapidly rising humidity or Botrytis is a fungus that shows up as little black or light brown spots on the orchid’s flowers....

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FUNGAL DISEASES: Anthracnose | Series 3

Posted by Team Orchid-Tree on

Anthracnose is more of a word used to describe a disease, and it is not a pathogen. All though it is caused by pathogens.  It is a combination of two Greek words Anthrax meaning Black AND Nosos meaning Disease. Symptoms Anthracnose refers to black spots or blemishes caused by a variety of fungal, bacterial or viral pathogens and observed predominantly on leaves. Generally, the fungi of the genus Colletotrichum and Glomerella causes black blemishes on orchids. The leaves are most often attacked. Leaf tips turn brown beginning at the apex and proceeding toward the base.   1 & 2) Anthracnose on Paphiopedilum, caused by Colletotrichum   3) Colletotrichum...

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Fungal Diseases: Leaf Spotting | Series 2

Posted by Team Orchid-Tree on

Symptoms Leaf spotting infections are caused by Cercosporoids, Guignardia & Phyllosticta & Septoria. Generally the symptoms appears as yellow, brown or black spots on the leaves or underneath leaves.     Treatment Spray the plants with mentioned dosage and clean the growing area with Hydrogen Peroxide diluted with water at a 1:10 ratio.  Following Fungicide is effective: Chemical Name: Combimnation of Boscalid and  Pyraclostrobin (Brand: Signum, Visma etc.) 1g/L of water This chemical combination is also effective against: Anthracnose Blossom blight Crown and basal rot Phytophthora aerial blight Crown and soil-borne diseases Keeping the plants drier will help to keep infection...

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Fungal Diseases: Black Rot | Series 1

Posted by Team Orchid-Tree on

Black Rot Black rot is caused by one or both, fungi Pythium and Phytophthora spp. They both feed on the root system, which causes stunted growth and death. They are both easily transmitted from plant to plant; it spreads by water irrigation, gardening tools, and human activity. Root rot disease is favoured by growing conditions that are too wet, such as when the growing medium does not drain quickly or when weather doesn’t allow rapid drying.  Symptoms This disease is very contagious and is primarily a root disease, but symptoms may be above the ground. Infected orchids generally show brown to black coloured canes starting from...

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Common Orchid Pests and Diseases Diagnosis, Treatment and Prevention | Table of content

Posted by Team Orchid-Tree on

We wish, you never have to go through this blog and your plants live healthy forever.  However just incase you find your precious orchids struggling, you have to give them best of the care and treatment at the right time to save them. With that in mind we are starting a series on the most common orchid diseases and pests identification, treatment and prevention.  This blog is an index or table of content for the entire series. What you’ll learn: how to identify, treat and prevent orchid pests and diseases. You will be able to click on the each of them as and when...

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