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Helianthus spp. are a nectar producing flowering plant that attract pollinators and parasitoids which reduce the pest populations in nearby crop vegetation. Sunflowers attract different beneficial pollinators (e.g., honey bees) and other known insect prey to feed on and control the population of parasitic pests that could be harmful to the ...
The common sunflower (Helianthus annuus) is a species of large annual forb of the daisy family Asteraceae. The common sunflower is harvested for its edible oily seeds , which are often eaten as a snack food .
Perennial sunflower is a crop of sunflowers that are developed by crossing wild perennial and domestic annual sunflower species.. Annual sunflower is a major oilseed crop. Genes from wild perennial relatives may increase root depth and mass and extend the growing season.
Helianthus strumosus, the pale-leaf woodland sunflower, [3] is a species of sunflower native to North America east of the Great Plains and is in the family Asteraceae. [4] It is a native perennial sunflower that resembles other members of this family including the Pale Sunflower (H. decapetalus), Woodland Sunflower (H. divaricatus), Hispid Sunflower (H. hirsutus), and Jerusalem Artichoke (H ...
There are eight different species that cause yield loss of sunflowers; however, Alternaria helianthi is the primary causal agent and most widespread. [5] The main hosts are sunflowers (Helianthus annuus); however, it has been proven that safflower (Carthamus tinctorius), noogoora burr (Xanthium pungens), cocklebur (Xanthium strumarium), and Bathurst burr (Xanthium spinosum) can serve as ...
Helianthus petiolaris is a North American plant species in the family Asteraceae, commonly known as the prairie sunflower [2] or lesser sunflower. [3] Naturalist and botanist Thomas Nuttall was the first to describe the prairie sunflower in 1821. [4] [5] The word petiolaris in Latin means, “having a petiole”. [5]
With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower. Most genera and species are found in North America (particularly in Mexico) and South America. A few genera are pantropical.
Helianthus giganteus is a perennial herbaceous plant native to the northern United States and southern Canada that can grow up to 1–3 metres (3.3–9.8 ft) tall with instances to 4m (13 feet). The leaves are approximately 1 inch wide by 7 inches long, and partly rough.