Acta Entomologica Sinica (1997) 40, S190-S195

Julian Chen, Jingrui Sun, Hongjian Ding, Hanxiang Ni and Xiafei Li (1997)
[The resistant patterns and mechanism of biochemical resistance in various wheat cultivars (lines)]
Acta Entomologica Sinica 40 (Supp.), S190-S195
Abstract: Ten winter wheat cultvars (lines) with different degrees of resistance to wheat aphids were studied at seedling stage under the lab condition on the parameters of life table, resistant patterns and the content of some secondary substances in the plant tissues. The control capacity on Sitobion avenae F. (SA) and Rhopalosiphum padi L. (RP) and partial biochemical resistant mechanism have been revealed. The results showed the resistant patterns of cultivars to wheat aphid being 30% non-perference and 70% antibiosis. The non-perference resistant cultivars made aphids crawling frequently and decreasing the colonial rate on wheat leaf greatly, but the colonial individuals and their growth rate and fecundity were as CK. The cultivars with different degrees of antibiosis resistance made SA and RP nymphal development prolonged by 2.1%-28.2% and 3.7%-13.9%, nymphal mortality increased 1.0-3.6 and 1.0-2.25 times, average longivity shortened by 10.2% - 96.5% and 37.5% -97.1% and fecundity decreased by 3.4% -72. 8% and 25% - 97.2%, respectively. The result of biochemical analysis at seedling stage showed that there were significant differences in the contents of tannin and phenolic in plant tissues between the resistant and susceptible cultivars. The correlation between phenolic content and the resistant degree to SA was negatively significant (P < 0.05). The correaltion between phenolic content and the innate capacity for increase (r_m) of SA was also negatively significant. So, phenols in plant tissues seem to be one of the key resistant factors to SA. No correlation between phenolic content and the resistant degree to RP or r_m of RP was found. There was no correlation between tannin content and the resistant degree to both wheat aphids.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Ju Lian Chen

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitobion avenae	Wheat (Triticum)
	Rhopalosiphum padi	Wheat (Triticum)