|IBRAHIM, IBRAHIM KHAYRY - ALEXANDRIA UNIVERSITY OF EGYPT|
|EL-SAEDY, MOHAMED - ALEXANDRIA UNIVERSITY OF EGYPT|
|AWD-ALLAH, SHERIN FADL ALI - EGYPTIAN MINISTRY OF AGRICULTURE|
|MOKBEL, ASMA ABD EL- - JAZAN UNIVERSITY|
Submitted to: International Journal of Nematology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/7/2015
Publication Date: 8/11/2015
Publication URL: http://handle.nal.usda.gov/10113/61264
Citation: Ibrahim, I.K.A., El-Saedy, M.A., Awd-Allah, S.F.A., Handoo, Z.A., Mokbel, A.A. 2015. Pathogenicity of Heterodera daverti, H. zeae, and Meloidogyne incognita on rice. International Journal of Nematology. 25(1):12-16.
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 and root-knot nematodes are the most economically important groups of plant-parasitic nematodes worldwide. One problem with cyst and root-knot nematodes is that growers often have little idea of the host range of nematodes on specific crop cultivars. In the present study, ARS and Alexandria University scientists examined the reactions of five rice cultivars to the cyst nematodes Heterodera daverti and H. zeae and the root-knot nematode Meloidogyne incognita in the greenhouse. The results showed that both cyst nematodes reproduced successfully on some of the tested rice cultivars but not others. In contrast, all tested rice cultivars were either susceptible or highly susceptible to the root-knot nematode. The results are significant because they provide the first evidence that the specific tested cultivars are resistant or susceptible to the nematode species examined. This research will be of use to scientists, growers and extension agencies involved in cyst and root-knot nematode research and control.
Technical Abstract: The reactions of five rice cultivars to the cyst nematodes Heterodera daverti and H. zeae and the root-knot nematode Meloidogyne incognita were determined in the greenhouse. The results showed that both H. daverti and H. zeae infected and reproduced successfully on some of the tested rice cultivars. Rice cultivars Giza 177 and Giza 178 were moderately susceptible and susceptible to H. daverti, respectively, while the other tested cultivars (Giza 171, Sakha 101, and Sakha 102) were resistant. Also, rice cultivars Giza 178 and Sakha 101 were susceptible to H. zeae and cultivars Giza 177 and Sakha 102 were moderately susceptible, whereas cv. Giza 171 was moderately resistant. In contrast, the tested rice cultivars were either susceptible or highly susceptible to M. incognita.