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a) underside of scale showing female and eggs, x24 b) scale upperside, x24 c) female scales on twig d) male scale, x12 e) male scales on twig. Female scale insects in more advanced families develop from the egg through a first instar (crawler) stage and a second instar stage before becoming adult. In more primitive families there is an ...
Kondrat says you typically need to water an orchid every 7 to 10 days, but he cautions that’s a general rule of thumb and your orchid might need a different watering schedule.
Coccus hesperidum is a soft scale insect in the family Coccidae with a wide host range. It is commonly known as brown soft scale. It has a cosmopolitan distribution and feeds on many different host plants. It is an agricultural pest, particularly of citrus and commercial greenhouse crops.
Septoria selenophomoides is a fungal plant pathogen infecting orchids. It causes leaf spots, starting with small yellowish lesions on the plant's leaves and darkening to brown or black. [1] [2] If the infection develops further, the leaves and fruit fall from the orchid and spread the infection. [2]
P. cactorum requires free water to reproduce. [1] Zoospores are released from sporangium and blown via wind or rain splash and use free water on the leaf to germinate. [1] An appressorium is formed and a penetration peg penetrates the leaf surface. [1] From there, hyphae grow throughout the leaf and infects all plant tissues. [1]
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
Wax scale, Ceroplastes cirripediformis. The Coccidae are a family of scale insects belonging to the superfamily Coccoidea. They are commonly known as soft scales, wax scales or tortoise scales. The females are flat with elongated oval bodies and a smooth integument which may be covered with wax.
Cercospora is a genus of ascomycete fungi. Most species have no known sexual stage, and when the sexual stage is identified, it is in the genus Mycosphaerella. [2] Most species of this genus cause plant diseases, and form leaf spots.