Search results
Results from the WOW.Com Content Network
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
The disease attacks during the summer months and causes yellow or orange spots to grow on the leaves of the cotton plant. These spots can cause defoliation, premature openings, broken stems, and reduced yield. [77] Crops with severe outbreaks have been known to incur losses of up to 50%. [76] This disease is controlled with applications of ...
Lupinus argenteus plant, with silvery leaves. Lupinus argenteus is a species of lupine known by the common name silvery lupine. [2] It is native to much of western North America from the southwestern Canadian provinces to the southwestern and midwestern United States, where it grows in several types of habitats, including sagebrush, grassland, and forests.
An array of leaves encircles the base. Each palmate leaf is made up of 6 to 8 leaflets about a centimeter long and a few millimeters in width. The inflorescence is a petite spiral of flowers a few centimeters long just arising past the basal disc of leaves. Each flower is 6 to 8 millimeters long and bright blue in color, generally with a white ...
The species are mostly herbaceous perennial plants 0.3–1.5 metres (1–5 feet) tall, but some are annual plants and a few are shrubs up to 3 m (10 ft) tall. An exception is the chamis de monte (Lupinus jaimehintonianus) of Oaxaca in Mexico, which is a tree up to 8 m (26 ft) tall.
Lupinus excubitus is a small shrub with gray-green foliage. The fan-shaped leaves are borne on the stem and may be clustered at the base. Generally covered with silvery hairs, each is made up of 7 to 10 narrow 5–50 millimetres (0.2–2.0 in) leaflets. The raceme inflorescence is a tall stalk of rich purple flowers, each with a bright yellow spot.
The basal leaves are much more numerous with the 7–30 centimeter long leaf stems [3] spreading in every direction to from a rounded tuft of leaves. [2] Each leaf is made up of 8–13 small leaflets, [ 3 ] each leaflet is 4–8 centimeters long and rarely less than 10 millimeters wide. [ 4 ]
Lupinus succulentus is a species of lupine known by the common names hollowleaf annual lupine, arroyo lupine, and succulent lupine. It is native to California , where it is common throughout much of the state, and adjacent sections of Arizona and Baja California .