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Spilocaea oleaginea. Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive peacock spot, also known as olive leaf spot and bird's eye spot. This plant disease commonly affects the leaves of olive trees worldwide. The disease affects trees throughout the growing season and can cause significant losses in yield.
Leaf spot. A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [ 1] Symptoms can overlap across causal ...
M. scutellatus. Binomial name. Monochamus scutellatus. ( Say, 1824) Subspecies. M. s. oregonensis. M. s. scutellatus. Monochamus scutellatus, commonly known as the white-spotted sawyer or spruce sawyer or spruce bug or a hair-eater, [1] is a common wood-boring beetle found throughout North America. [2] It is a species native to North America.
Small. Natural range. Acer leucoderme (English: chalk maple; also whitebark maple, pale-bark maple and sugar maple [2]) is a deciduous tree native to the southeastern United States from North Carolina south to northwest Florida and west to eastern Texas. It lives in the understory in moist, rocky soils on river banks, ravines, woods, and cliffs.
The leaves are arranged in opposite decussate pairs or whorls of three; in adulthood they are scale-like, 1–2.5 mm (1 ⁄ 16 – 1 ⁄ 8 in) long (up to 5 mm) and 1–1.5 mm broad. The cones are berrylike , 7–15 mm ( 1 ⁄ 4 – 9 ⁄ 16 in) wide, green when young and maturing to orange-brown with a whitish waxy bloom,.
Beech bark disease is a disease that causes mortality and defects in beech trees in the eastern United States, Canada and Europe. [1] [2] [3] In North America, the disease occurs after extensive bark invasion by Xylococculus betulae and the beech scale insect, Cryptococcus fagisuga. [4] Through a presently unknown mechanism, excessive feeding ...
The White Wisteria is quite the spectacle. In late spring, it can create a cluster of flowers that stretch out to be as long as 24 inches. It's also known as the ultimate symbol of a well-tended ...
Citrus canker. Citrus canker is a disease affecting Citrus species caused by the bacterium Xanthomonas ( X.axonopodis; X. campestris ). Infection causes lesions on the leaves, stems, and fruit of citrus trees, including lime, oranges, and grapefruit. While not harmful to humans, canker significantly affects the vitality of citrus trees, causing ...