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《Journal of Anhui Agricultural Sciences》 2005-06
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Studied on Primary Infection Source of Spring Wheat Scab in Eastern Agricultural Area of Qinghai Province

ZHANG Chang-qing et al (Agricultural College of Yangtze University, Jingzhou,Hubei 434025)  
The primary infection source of spring wheat scab was continuously studied for three years in the eastern agricultural seven counties of Qinghai province. The results showed that primary infection source of wheat scab varied considerably in the geography condition and the species of planted crop. Its main source could be divided into two kinds of states: in partly villages and towns of Minghe and Ledu counties with corn planting, the sources mainly were the procreant perithecium and ascospore on the corn stubbles and ones stalks;in other each county, its source came from the wheat stubble and seed of vector. Results of isolation from different crops stubble were: Fusarium graminearum Schwabe (from the stubbles of corn), Fusarium avenaceum (Fr) Sacc and Fusarium acuminatum Elf.et.Ev (from wheat- stubbles), Fusarium tricinctum (Corda) sacc (on the pea-stubbles), and Fusarium avenaceum (Pr.) Sacc (on the rape- stubbles), all of these belonged to the pathogens of wheat scab. But the results of returning inoculation experiment showed that the Fusarium species were separated from corn root- stubble and wheat spike or wheat stubble all may cause this disease. But the Fusarium separated from rape or faba bean stubble had only feeble pathogenicity or had no pathogenicity to spring wheat.
【CateGory Index】: S435.121
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