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ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » Mycology and Nematology Genetic Diversity and Biology Laboratory » Research » Publications at this Location » Publication #351337
Title: Pathogenicity and control of Meloidogyne incognita on rice in Egypt

Author
item IBRAHIM, I K A - Alexandria University Of Egypt
item Handoo, Zafar

Submitted to: Pakistan Journal of Nematology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/8/2018
Publication Date: 6/22/2018
Citation: Ibrahim, I., Handoo, Z.A. 2018. Pathogenicity and control of Meloidogyne incognita on rice in Egypt. Pakistan Journal of Nematology. 36(2):123-129.

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. Root-knot nematodes are the most economically important groups of plant-parasitic nematodes worldwide. One problem with root-knot nematodes is that growers often have a poor idea of the host range of nematodes on specific crop cultivars. In the present study, ARS and Alexandria University scientists examined the reactions of 17 rice cultivars to the Mi1 and Mi3 races of the root-knot nematode Meloidogyne incognita. When challenged with Mi1, cultivars Araby, Giza 159, Giza 170, Giza 171, Giza 172, Giza 177, Giza 178, Nahda, Sakha 101 and Sakha 102 were susceptible or highly susceptible; A95, IR1, IR22 and Japonica 47 were less susceptible; and IR28, IR459 and Philippini 24 were moderately resistant. In contrast, all tested rice cultivars were either resistant or moderately resistant to Mi3. The results are significant because they provide the first evidence that these specific cultivars are resistant or susceptible to the nematode race examined. This research will be of use to scientists, growers and extension agencies involved in root-knot nematode research and control.

Technical Abstract: The pathogenicity of root-knot nematode Meloidogyne incognita race 1(Mi1) and race 3 (Mi3) on rice (Oryza sativa L.) was studied in the greenhouse. Seventeen rice cultivars were tested for resistance to Mi1 and Mi3. The results showed that rice cvs Araby, Giza 159, Giza 170, Giza 171, Giza 172, Giza 177, Giza 178, Nahda, Sakha 101 and Sakha 102 were either susceptible or highly susceptible to Mi1. Rice cvs A95, IR1, IR22 and Japonica 47 were moderately susceptible to Mi1, whereas cvs IR28, IR459 and Philippini 24 were moderately resistant to Mi1. On the other hand, all the tested rice cultivars were either resistant or moderately resistant to Mi3. Control of M. incognita race 1 on rice cv. Sakha 101 was studied in the greenhouse. Three tests were conducted to study the effects of soil treatment with some plant materials, stems of oyster mushroom (Pleurotus ostreatus), the biocontrol agent Bacillus thuringiensis, the bionematicide abamectin, and the nematicide fenamiphos on Mi1 on rice cv. Sakha 101. All the applied control treatments were effective in reducing nematode infection on rice plants.