An annual plant, witchweed overwinters in the seed stage. Its seeds germinate in the presence of host root exudate, and develop haustoria which penetrate host root cells. Host root exudate contain strigolactones, signaling molecules that promote striga seed germination.
What is unique about witchweed?
Commonly known as ‘witchweed,’ the parasitic plant Striga hermonthica devastates crops in sub-Saharan Africa. Scientists have discovered a unique protein in Striga that helps sustain its high transpiration. … In transpiration, water is carried through plants and evaporates from their leaves via stomata (breathing pores).
How do you control witchweed?
(witchweed), which causes considerable crop losses to sorghum (Sorghum vulgare Pers.) in the Sudan and elsewhere, can be controlled by spraying the young crop with hormone weed-killers of 2,4-D type two to three weeks after sowing.
How did witchweed get here?
Witchweed is a parasitic weed from Asia and Africa that attaches to the roots of grasses and grass crops such as corn and sorghum. Witchweed was first detected in the western hemisphere in a corn field in Columbus County, North Carolina, in July, 1956.
What Striga means?
1 : a pointed appressed rigid hairlike scale or bristle. 2 : a flute in a column.
What is Striga lutea?
Kuntze. Synonyms. Striga lutea. Striga asiatica, the Asiatic witchweed or the red witchweed, is a hemiparasitic plant in the family Orobanchaceae. It is native to Asia and sub-Saharan Africa, but has been introduced into other parts of the world including Australia and the United States.
How do you control Striga?
Methods for integrated Striga control are described: (1) hand-pulling and hoe-weeding; (2) the use of Striga-free seed; (3) early planting; (4) intercropping of cereals with legumes; (5) the use of trap crops in rotation with cereals; (6) the use of inorganic N fertilizer and animal manure; (7) host plant resistance; ( …
How do you control Striga spp?
Rotation: trap-crops and catch crops
Crop rotation of infested land with non-susceptible crops or fallowing is theoretically the simplest solution. Rotation with non-host crops interrupts further production of Striga seed and leads to decline in the seed population in the soil.
Which crop is associated with Striga?
Striga are obligate root-parasitic plants of the major agricultural cereal crops, including millets, in tropical and semi-arid regions of Africa, Middle East, Asia, and Australia. Consequently, they cause severe to even complete losses in crop grain yield.
What does witchweed look like?
Witchweeds are branched herbs, 15 to about 75 cm (0.5 to 2.5 feet) tall, with opposite or alternate, usually narrow and rough or sometimes scalelike leaves. The two-lipped solitary flowers are red, yellow, purplish, bluish, or white.
Is Loranthus parasitic?
Loranthus is a genus of parasitic plants that grow on the branches of woody trees. It belongs to the family Loranthaceae, the showy mistletoe family. In most earlier systematic treatments it contains all mistletoe species with bisexual flowers, though some species have reversed to unisexual flowers.
Is Striga a partial root parasite?
Witch weed (Striga species) is well known partial root parasite of sugarcane Jawar, maize, cereals and millets in India. There are four species of Striga reports in the country on sugarcane, rice , sorghum and other millets.
Where is witchweed found?
Native to Africa, witchweed was first found in the adjoining areas of North and South Carolina in the 1950s. An obligate hemiparasite, witchweed must be associated with an appropriate host. Witchweed is typically found in gardens, vacant fields, roadsides, yards and around farm buildings.
What is phanerogamic parasite?
PHANEROGAMIC PARASITE. “The plants which produce flower and subsequently bear seeds in fruits and parasitized on other plants known as Phanerogamic parasite” General Properties of Parasitic Plants. Nutrients and water are transported via a Physiological bridge called the Haustorium.
Which is a total root parasite?
Balanophora is a total root parasite because it sucks sugars, minerals and also water from the roots of host plants like cabbage etc for its survival, in turn, harming the host. So, the correct option is ‘Balanophora/ Orobanche’.
Is Ciri a Striga?
Her story is told in Disenchanting a Striga. She appears in some of the comics: in Geralt comic, the Polish comic illustrated by Bogusław Polch, and in The Witcher: Curse of Crows as a striga when Geralt retells Ciri the backstory of his first striga contract.
Who cursed the Striga?
Cursed as a Striga
Adda was born a striga as a result of a curse cast by Ostrit, who was jealous of her mother’s incestuous relationship with her father. Ostrit tried to put a curse on the king, which unintentionally resulted in her mother’s death and her becoming a striga.
Is a Striga a vampire?
Striga is a female vampire with androgynous features.
Are Morana and Striga sisters?
This team of vampires is much more than meets the eye. … The Council of Sisters consists of four vampire females- Striga, Lenore, Morana, and Carmilla– who rule over Styria. Dracula wanted to avenge his wife. But the sisters love to see humans suffer and want to prison them as livestock.
Is Rafflesia a partial parasite?
Rafflesia is the biggest flower. The plant does not have stem leaves or root. They do not have chlorophyll so they cannot prepare their own food. … So the plant is considered as a total root parasitic plant.
Is example of stem parasite?
Example of Total Stem Parasites. Cuscuta is a total stem parasite that grows on a number of plants like Duranta, Zizypus, Citrus, etc. It is popularly known as dodder plant.
Is Cuscuta a parasite?
Cuscuta spp. (i.e., dodders) are plant parasites that connect to the vasculature of their host plants to extract water, nutrients, and even macromolecules.
How do I get rid of Loranthus?
- Removal by the scrapping of the parasite from the infected branch before flowering with the help of Amar Loranthus cutter.
- Well established Loranthus bushes are cut below the point of penetration and destroyed.
- Application of 0.5% Glyphosate at the point from where the Loranthus.
Does Cuscuta have roots?
Cuscuta spp. possess no roots nor fully expanded leaves and the vegetative portion appears to be a stem only. The parasite winds around plants and penetrates the host stems via haustoria, forming direct connections to the vascular bundles of their hosts to withdraw water, carbohydrates, and other solutes.