Search results
Results from the WOW.Com Content Network
Thrip damage is often confused with aphid issues and plant nutrient deficiencies. Looking for these signs and symptoms can help you identify thrip problems before they get out of hand: Yellow or ...
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]
The virus has not often been reported in wild orchid populations. [2] It can be found in a wide variety of orchid genera [3] but does not infect plants other than orchids. [2] Once an orchid is infected, the virus spreads throughout the infected plant in a number of weeks. [4] Control measures may include sanitizing pruning equipment between ...
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
Stethopachys formosa, the orchid beetle or dendrobium beetle, is an Australian insect found in northern New South Wales, Northern Territory and Queensland. [2] They cannot survive in colder climates, and they do not appear in Southern states. [3] This insect feeds on the flowers and leaves of orchids, often causing damage to cultivated plants. [4]
The adults of both sexes of P. kellyanus are brownish in colour, with the basal area of the forewings being lighter in colour. [1] [6] [7] The female of the species was originally recorded as 1.6-1.8 mm long, and the male about 1.2 mm; [1] a 2016 factsheet from the South Australia Research & Development Institute gives a range of about 1-2mm for adult size. [8]
Orchid seeds are very small (0.35mm to 1.50mm long), spindle-shaped, and have an opening at the pointed end. [5] Each seed has an embryo that is undifferentiated and lacks root and shoot meristems. [3] An orchid seed does not have enough nutritional support to grow on its own, and lacks endosperm. [2]
Angraecum, also known as comet orchid, [2] [3] [4] is a genus of the family Orchidaceae native to tropical and South Africa, as well as Sri Lanka. It contains 223 species . [ 1 ]