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Calligrapha suturalis, commonly known as the ragweed leaf beetle, is a species of leaf beetle belonging to the family Chrysomelidae, in the subgenus Zygogramma, which was formerly a genus. [1] Native to North America, it has been introduced into Russia and China for the biological pest control of ragweed.
Ragweed pollen can remain airborne for days and travel great distances, and can even be carried 300–400 miles (500–600 km) out to sea. [12] Ragweeds native to the Americas have been introduced to Europe starting in the nineteenth century and especially during World War I , and have spread rapidly since the 1950s. [ 15 ]
Common ragweed is a very competitive weed and can produce yield losses in soybeans as high as 30 percent. Control with night tillage reduces emergence by around 45 percent. Small grains in rotation will also suppress common ragweed if they are overseeded with clover. Otherwise, the ragweed will grow and mature and produce seeds in the small ...
Ragweed will extend allergy season well into the fall, with one annoying symptom. What you need to know and how to treat the symptoms. Ragweed will extend allergy season well into the fall, with ...
Ambrosia trifida, the giant ragweed, is a species of flowering plant in the family Asteraceae. It is native to North America , where it is widespread in Canada , the United States , and northern Mexico .
Ambrosia psilostachya is a species of ragweed known by the common names Cuman ragweed and perennial ragweed, [4] and western ragweed. Distribution and habitat
Ambrosia acanthicarpa is a North American species of bristly annual plants in the family Asteraceae.Members of the genus Ambrosia are called ragweeds.The species has common names including flatspine bur ragweed, [3] Hooker's bur-ragweed, [4] annual burrweed, annual bur-sage, and western sand-bur.
Ambrosia bidentata, the lanceleaf ragweed, [1] is a North American species of plants in the family Asteraceae. It is native to the central and eastern parts of the United States, primarily the Mississippi Valley and the eastern Great Plains. [2] Ambrosia bidentata is an annual herb up to 100 cm (40 inches) tall. Leaves have only a few lobes ...