Submitted to: Society of Nematology Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 6/24/2000
Publication Date: 12/1/2000
Citation: Handoo, Z.A., Ibrahim, I.K. 2000. Occurrence of a new species of plant-parasitic cyst nematode (heterodera sp.) on panicum coloratum. Journal of Nematology 32:434. Interpretive Summary:
Technical Abstract: An undescribed plant-parasitic cyst nematode (Heterodera sp.) was found associated with Qasabagrass roots (Panicum coloratum) growing near a date palm in Alexandria, Egypt. It is characterized in having second-stage juveniles (J2) with body length of 516 micrometers (485-550), stylet length of 23 micrometers (22.5-23.5) with anchor-shaped knobs, lateral field with 3 lines, tail 62-71 micrometers long, hyaline tail terminus 40 micrometers (35-43); cysts are lemon-shaped, dark to light brown in color with an extensive sub-crystalline layer covering the entire cyst, cysts ambifenestrate, well developed underbridge with finger-like projections, bullae present, vulva slit measuring 44-48 micrometers long. Males are absent and females have heavy punctations on the cuticle. Its relationship to H. graminophila Golden and Birchfield, 1972, and H. leuceilyma Di Edwardo and Perry, 1964, described from Florida and Louisiana, USA, are discussed. The present known distribution is restricted to Alexandria, Egypt. Its economic importance in rangeland grasses and cultivated crops such as rice is not known.