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United States Department of Agriculture

Agricultural Research Service

Research Project: MORPHOLOGICAL AND MOLECULAR IDENTIFICATION AND SYSTEMATICS OF AGRICULTURALLY IMPORTANT NEMATODES

Location: Nematology Laboratory

Title: Host suitability of some Poaceous crop cultivars for Heterodera goldeni

Authors
item Ibrahim, Khayry Atris -
item Awd-Allah, Sherin -
item Handoo, Zafar

Submitted to: Nematropica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: October 10, 2012
Publication Date: April 1, 2013
Citation: Ibrahim, I.K.A., Awd-Allah, S.F.A., Handoo, Z.A. 2012. Host suitability of some Poaceous crop cultivars for Heterodera goldeni. Nematropica. 42(2):324-327.

Interpretive Summary: Plant-parasitic nematodes are microscopic worms that feed on plants and cause an estimated ten billion dollars of crop losses each year in the United States and 100 billion dollars globally. Cyst nematodes are an important group, damaging the roots of many kinds of plants worldwide. For example, one cyst nematode species was recently found attacking qasabagrass in Alexandria, Egypt and was subsequently found attacking common reed as well as wild grass and sugarcane seedlings in other countries. One problem with cyst nematode damage to other economically important crops is that growers have no idea of the host range of the qasabagrass nematode and, therefore, what nonhost plants can be grown to reduce nematode numbers. In the present study, ARS and Alexandria University scientists examined several plant species (four corn, four sorghum and five rice cultivars) for their susceptibility to the qasabagrass cyst nematode. The corn hybrids Pioneer 3062 and SC 10 were susceptible and moderately susceptible, respectively, while the corn hybrids SC 123 and TWC 324 were moderately resistant. All sorghum and rice cultivars were susceptible or highly susceptible to the nematode. The results are significant because they provide the first evidence that two crops are resistant to the nematode and are thus suitable for crop rotation practices to control this cyst nematode. This research will be of use to scientists, growers and extension agencies involved in cyst nematode research and control.

Technical Abstract: The host suitability of four corn, four sorghum and five rice cultivars to the cyst nematode Heterodera goldeni was determined in the greenhouse. The results showed that H. goldeni infected and reproduced successfully on all the tested poaceous crop cultivars. The corn hybrids Pioneer 3062 and SC 10 were susceptible and moderately susceptible to H. goldeni, respectively, while the corn hybrids SC 123 and TWC 324 were moderately resistant. The sorghum cultivars Balady, Dorado, Giza 15 and H 1020 were susceptible to H. goldeni. The rice cultivars Giza 171, Giza 177, Giza 178, Sakha 101 and Sakha 102 were susceptible or highly susceptible to H. goldeni.

Last Modified: 8/30/2014
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