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Development of the False Root-knot Nematode, Nacobbus aberrans, on Sugarbeet


, : Development of the False Root-knot Nematode, Nacobbus aberrans, on Sugarbeet. Journal of Nematology 15(2): 288-296

The duration of the embryogenic development of N. aberrans (= N. batatiformis) took 9-10 days at 25.degree. C and 51 days at 15.degree. C. The J1 [1st stage juvenile] molted in the egg; hence the J2 [2nd stage juvenile] emerged from the egg. The effect of distilled water and root leachates of kochia [Kochia scoparia] and sugarbeet was investigated at 5, 10, 15, 20 and 25.degree. C. Root leachates did not significantly affect the percent of cumulative hatch of eggs, but temperature did significantly affect emergence of juveniles (P = 0.05). Less than 1, 5 and 20% of eggs hatched at 5, 10 and 15.degree. C, respectively. The percent of cumulative hatch at 20.degree. C was 4 times greater than at 15.degree. C; the highest percentage of juveniles emerged at 25.degree. C. The duration of postembryogenic development from J2 inoculation until the appearance of mature females with egg masses took 38 days, and the life cycle from egg to egg was completed in 48 days at 25.degree. C. All immature stages, young females and males were migratory endoparasites. Young females were able to leave the root swellings, where they developed from juvenile stages, and re-enter the root, where they formed a true gall and became sedentary. Thirty days after inoculation with J2 nematodes, specimens were detected in root tissues at 10, 15, 20, 25 and 30.degree. C, but not at 5.degree. C. Five days after inoculation at 23.degree. C (.+-. 2.degree. C), juveniles had penetrated the roots and caused slight swellings of the tip and axis of sugarbeet feeder roots. Large cavities extended from the cortical parenchyma to the periphery of the stelar area, and 50% of the central cylinder was destroyed 25 days after inoculation at 23.degree. C. No synctia formation were detected in the sugarbeet root swellings infected with juveniles. Syncytia were associated only with adult females; hyperplasia, abnormal proliferation of lateral roots, and asymmetry of root structure were additional anatomical changes induced by adult females. Only very smooth annules but no cuticular ornamentations were noted by SEM [scanning electron microscope] on the perineal area of adult females.

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PMID: 19295804


Other references

Srivastava, D.S.; Bell, T., 2009: Reducing horizontal and vertical diversity in a foodweb triggers extinctions and impacts functions. Species loss can result in secondary extinctions and changes in ecosystem functions at distant trophic levels. Such effects of species loss are predicted to be affected by both the number of species lost within a trophic level (horizontal diversit...

Hammond, B.L., 1966: Homozygous diploid sugar beets. The beets were produced by colchicine treatment of seedlings from the line 258CI to give tetraploid plants. Five selected tetraploids were selfed, yielding 43 seedlings of which one was a haploid (n = 9). This plant was characterized by narrow, ta...

Liu, D.; Li, A.; Mao, X.; Jing, R., 2014: Cloning and characterization of TaPP2AbB"-α, a member of the PP2A regulatory subunit in wheat. Protein phosphatase 2A (PP2A), a major Serine/Threonine protein phosphatase, consists of three subunits; a highly conserved structural subunit A, a catalytic subunit C, and a highly variable regulatory subunit B which determines the substrate spec...

Mizuno, Kazuharu, 1998: Succession processes of Alpine vegetation in response to glacial fluctuations of Tyndall Glacier, Mt. Kenya, Kenya. The Tyndall Glacier of Mt. Kenya retreated at a steady rate from the late 1950s to 1996. The first colonist species over the new till, Senecio keniophytum, advanced at a rate similar to the retreat of the glacier. The species growing near the ice-...

Miller, J.A., 1984: The health care cost epidemic. Best's Review. Life-Health Insurance Edition 84(12): 26, 30, 32-26, 30, 32

Marliere, R., 1969: Les facies et l'extension du Heersien dans le Bassin de Mons. Annls Soc. geol. Belg.: 92: 51-77

Xiao WenFa; Han JingJun; Guo ZhiHua; Guo QuanShui; Zheng WeiLie; Luo DaQing, 2003: Response of Linzhi spruce's net photosynthetic rate to environmental factors in Tibet. The daily change in net photosynthetic rate (NPR) and its response to environmental factors such as quantum radiation, relative humidity and CO2 concentration of Linzhi spruce (Picea likiangensis var. lizhiensis) was monitored with a portable phot...

Passetti, R.Augusto.Cortez.; Torrecilhas, J.Akamine.; Ornaghi, M.Garcia.; Mottin, C.; de Oliveira, C.Antonio.Lopes.; Guerrero, A.; Del Mar Campo, M.; Sañudo, C.; do Prado, I.Nunes., 2016: Validation of photographs usage to evaluate meat visual acceptability of young bulls finished in feedlot fed with or without essential oils. NlmCategory="UNASSIGNED">Forty ½ Brown Swiss×½ Nellore crossbred bulls were distributed into three experimental groups: CON - diet without addition of essential oils; CLO - diet with average 5,000mg/animal/day of clove essential oi...

Aguilar, I.G., 1976: Program of radiologic protection in Latin America. Journal of the American Medical Women's Association 31(6): 238-242

Peklo, A.M.; Lomadze, N.K. ; Bakhtadze, G.B.; Kazakov, B.A.; Til'ba, P.A., 1978: Ecology of ficedula parva parva aves muscicapidae in the northwestern caucasus. Nest clutches and nestling growth from hatching to the time F. parva parva fly from the nest are described. Data on parents' activity and their behavior near the nest during the feeding period are presented. The study was done in the northwes...