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Description. Elm leaf beetle, side view. The imago (adult beetle) is 6–8 mm in length, and ranges from yellow to green in colour, with a spot on its head, an hourglass mark and two spots on the pronotum, and a broad, dark stripe along the edge of each elytron. The larvae are usually black, occasionally black and yellow, with multiple rows of ...
One generation of this beetle is produced a year. Adults feed before winter and spend most of their overwintering time in protected areas such as wind rows, crop stubble, and tree bark crevices. [1][2][3] Adults mate once the temperature warms to above 9–10 degrees Celsius (or 44.6 degrees F) [1][4] and females have a relatively long laying ...
Monocesta coryli. Monocesta coryli, the larger elm leaf beetle, is a species of skeletonizing leaf beetle in the family Chrysomelidae. It is found in eastern and southeastern North America, from Florida west to Kansas and north to Pennsylvania. It is the only species of the large neotropical genus Monocesta known to be found in the United States.
Dutch elm disease. Dutch elm disease (DED) is caused by a member of the sac fungi (Ascomycota) affecting elm trees, and is spread by elm bark beetles. Believed to be originally native to Asia, the disease was accidentally introduced into America, Europe, and New Zealand. In these regions it has devastated native populations of elms that did not ...
Flea beetle. The flea beetle is a small, jumping beetle of the leaf beetle family (Chrysomelidae), that makes up the tribe Alticini which is part of the subfamily Galerucinae. Historically the flea beetles were classified as their own subfamily. Traditionally, the Alticini were separated from other Galerucinae by the presence of jumping hind ...
Boxelder bugs only feed on box elder seeds and leaves, so they don't actually cause damage to most plants. "They appear in high numbers which leads people to get concerned when you see 50, 60 ...
D.M.Henderson. Wheat leaf rust (Puccinia triticina) is a fungal disease that affects wheat, barley, rye stems, leaves and grains. In temperate zones it is destructive on winter wheat because the pathogen overwinters. Infections can lead up to 20% yield loss. The pathogen is a Puccinia rust fungus.
Stripe rust on wheat. Yellow rust, or stripe rust, takes its name from the appearance of yellow-colored stripes produced parallel along the venations of each leaf blade. These yellow stripes are actually characteristic of uredinia that produce yellow-colored urediniospores. Primary hosts of yellow rust of wheat are Triticum aestivum (bread ...