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White mold is the most common pathogen that affects sunflower and has been found to cause reduction in yield throughout the world including the United States, northern Europe, Great Britain and Russia. [6] Sclerotinia stem rot (or 'white stem rot', [7]) causes large yield losses in temperate climates, especially during cool and moist growing ...
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
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 ...
Find out why your orchid flowers are falling off prematurely and what you can do about it. ... They suck the sap from the orchid, causing yellowing leaves, dropped blooms, and eventual plant death ...
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.
Pterostylis acuminata has a rosette of between three and six dark green, oblong leaves, each leaf 10–40 mm (0.4–2 in) long and 8–20 mm (0.3–0.8 in) wide. A single green and white flower is borne on a flowering spike 150–250 mm (6–10 in) high.
Non-flowering plants have a rosette of between four and eight leaves, each leaf 6–30 mm (0.2–1 in) long and 5–15 mm (0.2–0.6 in) wide on a stem 10–15 mm (0.4–0.6 in) tall. When flowering, there are ten or more dark reddish-brown, green or green and white flowers borne on a flowering spike 100–450 mm (4–20 in) high.
When it flowers it produces a single white flower with green and brown stripes, borne on a spike 50–150 mm (2–6 in) high. There are between two and five stem leaves closely wrapped around the flowering spike. The flowers are 35–45 mm (1–2 in) long, 7–20 mm (0.3–0.8 in) wide and inflated, leaning forward with a downturned tip.