Symptoms: Severe attack produces leaf wilting and chlorosis. Infected plants may be stunted and die before seed set.
Pathogen and disease characteristics: Striga seeds are stimulated to germinate by root exudates of the host. Plants emerge close to host plant 1 to 2 months after crop is planted, flower 3 to 4 weeks after emergence, and produce mature seed a month later. The species are similar in appearance, with square stems, small, bright green elongated leaves, and red to pink flowers. Seeds are minute (less than 0.25 mm long) and borne in pods or capsules.
Host range: Pearl millet, maize, sorghum, sugarcane, rice, sudangrass, wheat, oats, barley.
Geographic distribution: USA (North and South Carolina), Africa, Australia, India, Indonesia, Southeast Asia.
Nomenclature discrepancies: None.
Seed transmission: Not seed transmitted.
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Original posting: June 5, 1999.