POPULATION CHANGES OF WHITE TIP NEMATODE Aphelenchoides besseyi ON CERTAIN RICE CULTIVATRS UNDER OUTDOOR CONDITIONS. | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 3, Volume 31, Issue 6, May and June 2006, Page 3939-3946 PDF (2.47 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2006.235227 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A. G. EI-Sherif,1; A. E.M. Khalil2 | ||||
| 1• Nematology Res. Unit, Agric. Zoology Dept., Fac. of Agric., Mansoura Univ . | ||||
| 2Plant Pathology Res. Inst. Agric. Res. Center, Giza, Egypt. | ||||
| Abstract | ||||
| Examination of while tip nematode, Aphelenchoides besseyi population changes as well as its rate of build-up on four rice cvs. I.e. Giza 171 and 177, Rehoo and Sakha 101 grown in pots (40-cm-diam.) during the rice growing season 2005 under outdoor conditions indicated that nematode population density was significantly different dependi:-:g on the rice cultivar and its growth stage. Generally, population density of A. besseyi remarkably increased during the vegetative stage (tillering), sharply decline in the flowering stage and then increased once again in the harvesting period but not exceeded that of the first growth stage. Among tested rice cultivars, Giza 171 encountered the highest cumulative nematode numbers with value of 194.3 individuals per g. plant sample and rate of build-up amounted to 4.8, whereas Sakha 101 gave the least value of nematode numbers (74.8) with rate of build-up value of 3.93. Regarding nematode population density recovered from soaking one hundred rice grains in water for 48 or 96 hrs, rice cv. Rehoo accomplished the highest numbers of A. besseyi (126 or 168), followed by Giza 171 (124.6 or 157) and Giza 177 (99.7 or 130.3), whereas Sakha 101 gave the low average nematode number with values of 77.6 or 107.0 individuals, respectively. In the meantime, rice cvs. Rehoo and Giza 171 achieved the highest levels of nematode infestation with values of 36.25% and 35.2%, respectively, whereas, Sakha 101 also showed the least level of nematode infestation (23.1 %). | ||||
| Keywords | ||||
| Aphelenchoides besseyi; Level of Infestation; Population changes; Rate of build-up; Rice cultivars | ||||
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