· Millet · Sorghum · Maize · Sugarcane
Striga, also known as Witchweed, is characterized by bright green stems and leaves as well as small, brightly colored flowers. If the weed parasitizes a crop it results in a significant loss of yield. The symptoms of the host plants are stunting, wilting and chlorosis.
Some species of striga are serious pathogens to crop cereals. Each plant can produce between 90,000 and 500,000 seeds, and the seeds can remain in the soil for over 10 years. Not all produced seeds are viable. The weed parasitizes the roots of the plants and absorbs the nutrients and water of the infested crop.
Striga can be very difficult to control due to the high amount of light seeds which are produced. Affected plants should be uprooted before they flower. Burn any plant residue.
Herbicides are available, but are very expensive. The sprayer needs protection and the herbicides can kill useful plants.
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