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White mold affects a wide range of hosts and causes sclerotinia stem rot. It is known to infect 408 plant species. As a nonspecific plant pathogen, [3] diverse host range and ability to infect plants at any stage of growth makes white mold a very serious disease. The fungus can survive on infected tissues, in the soil, and on living plants.
However, the first houseplant I was ever able to keep alive for a respectably long time also happened to be one of the most notoriously stubborn: an orchid. It was unexpected and not without a ...
Odontoglossum ringspot virus (ORSV) is a plant pathogenic virus that belongs to the family Virgaviridae. 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]
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
It is similar to other orchids in the Dactylorhiza maculata group. D. maculata ssp. maculata is distinguished by having the lip less deeply trilobed, while D. maculata subsp. saccifera has one spur large and saccular (sac-shaped) and the bracts of the inflorescence as long as or longer than the flowers.
Related: Everything You Need to Know About Orchid Pots. 2. Trim the Plant. ... That’s when the plant is preparing to put on new growth and new blooms, so it needs a good meal. Kondrat recommends ...
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]
It is commonly known as the white egret flower, fringed orchid or sagisō (鷺草). Pecteilis radiata grows with small tubers, from which grasslike leaves emerge. Flower spikes, which can be up to 50 cm tall, produce 2-3 white flowers that bloom in late summer. [ 2 ]