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Black rot on orchids is caused by Pythium and Phytophthora species. [1] Black rot targets a variety of orchids but Cattleya orchids are especially susceptible. [1] Pythium ultimum and Phytophthora cactorum are known to cause black rot in orchids. [1] Pythium ultimum is a pathogen that causes damping-off and root rot on plants. [2]
Crepe myrtles are for the most part trouble-free. But insects, cool nights, and too much shade can cause problems. If your tree didn't bloom or you've spotted mold, here's what you can do.
It is one of the most common viruses affecting cultivated orchids, perhaps second only to the Cymbidium mosaic virus. [1] It causes spots on leaves and colored streaks on flowers. [ 1 ] If a plant is also infected with the Cymbidium mosaic virus , it can lead to a condition called blossom brown necrotic streak.
Sooty mold is commonly seen on the leaves of ornamental plants such as azaleas, gardenias, camellias, crepe myrtles, Mangifera and laurels. Karuka is affected by sooty mold caused by Meliola juttingii. [6] Plants located under pecan or hickory trees are particularly susceptible to sooty mold, because honeydew-secreting insects often inhabit ...
A crepe myrtle that's been cut all the way back to its trunk is a common sight in the winter. Gardeners often think this is what the tree needs and, because it rarely hurts the plant, they keep ...
Given several weeks, a black sooty mold fungus will develop in the honeydew substrate. Outbreaks of crape myrtle bark scale are being seen across the Metroplex. To get rid of the sooty mold we ...
The English name 'common spotted' refers to the species' abundance and the spots on its leaves. The French and German common names also honour Leonhart Fuchs. This plant belongs to a problematic group of orchids. D. maculata subsp. fuchsii is very variable in flower colour and flower morphology, plant height and the scent of flowers.
Find out why your orchid flowers are falling off prematurely and what you can do about it. ... Refrain from moving a blooming orchid. You may want to relocate it to a spot where you can see its ...