Search Results

You are looking at 1 - 10 of 10 items for :

  • " Diuraphis noxia " x
  • All content x
Clear All

Basky, Z., Hopper, K.R. 2000. Impact of plant density and natural enemy exclosure on abundance of Diuraphis noxia (Kurdjumov) and Rhopalosiphum padi (L.) (Hom., Aphididae) in Hungary. Journal of Applied Entomology 124 :99

Restricted access

Du Toit, F., Walters, M.C. 1984. Damage assessment and economic threshold values for chemical control of the Russian wheat aphid, Diuraphis noxia (Mordvilko), on winter wheat. In: Walters, M.C. (ed.), Progress in the Russian wheat aphid ( Diuraphis

Restricted access

Tolmay, V.L., Lindeque, R.C., Prinsloo, G.J. 2007. Preliminary evidence of a resistance-breaking biotype of the Russian wheat aphid Diuraphis noxia (Kurdjumov) (Homoptera: Aphididae ), in South Africa. Afr. Entomol. 15 :228

Restricted access

Flight activity and species composition of alata aphids was monitored by yellow water pan traps for 20 years (1982–2001). Yellow water pan traps were placed into wheat fields; the species composition of wheat colonizing aphids was also studied in Mosonmagyaróvár. The results of the study are relevant to the region of Kisalföld. Yellow water pan traps collected 30 aphid species. The proportions of the cereal aphids in the yellow pan traps varied between years. Their proportions were the followings: Diuraphis noxia Kurdj.: 0.0–2.3 %, Metopolophium dirhodum Walk.: 0.9–35.4 %, Rhopalosiphum padi L. 2.4–48.9 %, Shizaphis graminum Rond.: 0.2–11.9 %, Sitobion avenae Fabr.: 0.5–32.4 %. The proportions of cereal aphids feeding on winter wheat varied between 0.0–3.0, 1.0–85.0, 1.0–89.0, 0.0–5.0, 1.0–97.0 %, respectively, during the period of the study. R. padi proved to be the most dominant species during the study (57%), followed by S. avenae (24%), M. dirhodum (17%) S. graminum and D. noxia (1–1%).Linear regression analyses revealed a significant relationship between the relative number of species caught and those living on the plants (R 2 =0.825) providing a reliable forecast. There was a strong relationship between the effective heat sum, calculated from the temperature between 1 st April and 31 st July, and the number of aphids caught by yellow pan traps and the number of aphids feeding on plants, R 2 =0.932 and R 2 =0.9612, respectively.

Restricted access

Flour from grains originating from plants infected artificially with cereal aphids were analyzed for glutenin and gliadin and total protein content, using Size Exclusion HPLC. Wheat plants were caged at the beginning of stem elongation. Cages were treated with 0.1 % methyl parathion. One week later, the caged plants were artificially infected with 5 aptera individuals of Metopolophium dirhodum, Diuraphis noxia, Sitobion avenae and Rhopalosiphum padi . It was found that aphid infection had significant effect on the glutenin and gliadin content, the total protein content and the gliadin/glutenin ratio. Both the glutenin and gliadin content was significantly higher in the seeds harvested from aphid infected plants. However, the gliadin/glutenin ratio was significantly lower in wheat flour prepared from aphid infected plants than in those from uninfected control. The most significant decrease in gliadin/glutenin ratio was caused by M. dirhodum, D. noxia, S. avenae infection followed by R. padi at high-abundance. As the gliadin/glutenin ratio was significantly lower in flours made from aphid infected wheat seeds, it may be suggested, that aphid feeding results in decreased bread making quality of wheat flour.

Restricted access

Fouché, A., Verhoven, R. L., Hewitt, P. H., Walters, M. C., Kriel, C. C. and De Jager, J. (1984): Russian aphid (Diuraphis noxia) feeding damage on wheat, related cereals and a Bromus grass species. In: Walters, M. C. (ed.): Progress in D. noxia

Restricted access

The involvement of nitric oxide (NO) in the Russian wheat aphid (RWA), Diuraphis noxia (Kurdjumov), resistance response of wheat (Triticum aestivum L.) was investigated. Resistant (cv. Tugela DN) and near isogenic susceptible (cv. Tugela) wheat plants grown under green-house conditions were used. Russian wheat aphid infestation induced an early accumulation of NO to a higher level in the resistant than susceptible plants. Nitric oxide accumulation corresponded with increased nitrate reductase (NR, EC 1.6.6.1) and nitrite reductase (NiR, EC 1.7.7.1) activities, suggesting a possible association with NO production. Inhibition studies confirmed the involvement of NR in NO production during the RWA resistance response. The use of a NO donor or NR inhibitor revealed that NO could act as another early signal for induction of the secondary defence enzymes, intercellular β-1,3-glucanase and peroxidase.

Restricted access
Cereal Research Communications
Authors: Tanja Gotlin Čuljak, Dinka Grubišić, Siniša Jelovčan, and Aleksandar Mešić

on the World s Crops An Indentification Giude Hughes, R. D.: 1988. A synopsis of information on the Russian wheat aphid, Diuraphis noxia (Mordwilko). Division of Entomology Technical Paper No. 28, CSIRO Australia

Restricted access

assessment of antibiosis resistance of different wheat cultivars to the Russian wheat aphid, Diuraphis noxia (Mordvilko) (Homoptera: Aphididae) at stem elongation growth stage. Munins Entomology and Zoology 5 :1060

Restricted access

Basky, Z. and Eastop, V. F. (1995): Diuraphis noxia and other cereal aphids in Hungary. J. Aphidology 5, 1-8. Diuraphis noxia and other cereal aphids in Hungary. J. Aphidology

Restricted access