parasitize economically important crops, vegeta-bles and oil plants. Parasitic weeds, especially Striga spp. A parasitic annual weed, dodder (Cuscuta species) afflicts many crops, ornamentals, and native plants virtually decimating them.How to get rid of dodder is an ongoing quest for the commercial farmer and may be of interest to the home gardener as well. The plant you have is one of 150 different species throughout the world with ten species identified in Florida. yield. Among root parasitic plants, the obli-gate root parasitic Orobanchaceae plants witchweed (Striga spp.) and Orobanche spp., are increasingly becoming a threat to agricultural food production in many countries (Parker, 2009, Parker, 2012).These weeds attack a wide range of important food crops, thus directly affecting the food and nutrition security of humans and cattle in Africa, Asia and the Mediterranean region. Welker, weed scientist, USDA (retired) Dodder ( Cuscuta ), a seed-producing parasite, entwined around blueberry ( Vaccinium ). Alternative Title: parasite. Parasitic weeds pose increasing threats to rain-fed rice production in Africa. dodder. Semi Stem parasite-g. Loranthus; Parasite: A parasite is an organism that lives in another organism, called the host, and often harms it. Courtesy of Dr. W.V. Although this development is real, several weeds still remain which seriously affect the production of a number of crops such as rice, with its incidence of red/weedy rice, and Echinochloa spp., parasitic Orobanche weeds found in sunflower, faba beans and solanaceous crops; parasitic Striga spp. Dodder weed control and management is of paramount importance to many commercial crop growers. Beneficial Effects Of Weeds. It depends on its host for survival. The energy the host would have put toward reproduction is diverted toward supporting the parasite. Phalaris in wheat field. Parasitic plants fall into two categories, root or stem parasitic weeds, according to the host organs to which they attach. and broomrape (Orobanche and Phelipanche spp.) (A parasite is a disease-causing organism that lives on or in a human or another animal and derives its nourishment from its host.) This is an interesting, parasitic plant called the dodder vine in the genus, Cuscuta. Information on the regional spread and economic importance of parasitic weeds in cereal production systems is scant. Some weeds such as Cynodon, Oanicum, Aspilia, Centrosema, Pueraria etc, serves as livestock feed. An example is the barnacle Sacculina, which degenerates the gonads of crabs such that males develop the appearance of females. Before looking at the origin of parasites, it is necessary to understand precisely what a “parasite” is. Cuscuta, Striga, Alectra etc are known to be common crop parasite. Most important species are Striga asiatica, S. aspera and S. hermonthica in rain-fed uplands, and Rhamphicarpa fistulosa in rain-fed lowlands. Parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism. It is also commonly called strangle weed, hairweed, hellbine, or angel’s hair. Some weeds are naturally parasitic to some crops and feed on them with specialized organs called haustoria. Other types-Relative weed- g. Rice in wheat field; Mimicry weeds-such weeds are similar in outer appearance with the crop, e.g. Parasitic worm: A worm classified as a parasite. Parasitic castrators either partly or fully inhibit a host's reproductive ability but allow the organism to live. Dodder vine, strangle weed, or hairweed. , root or stem parasitic weeds in cereal production systems is scant world with ten species identified Florida... 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