| Situation of the wheat weed and preventive countermeasures in Guanzhong wheat region |
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| DOI：10.7606/j.issn.1000-7601.2008.04.23 |
| Key Words: Guanzhong area cornfield weeds infectious hazard preventive／cure countermeasure |
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| Abstract: |
| Winter wheat is the prime food crop in Guanzhong area of Shaanxi Province．Weed disease is one of the main factors that limit the amount and stability of the wheat yield．In order to figure out the species and distribution／infection situation of the cornfield weed in this area it took3months to carried out one thorough investigation which covered25counties in Guanzhong area．And the result indicated that weeds in Guanzhong cornfield are not only various but also widely distributed which lead to serious harm．Among the weeds the most popular and harmful ones are celery wormwood cleavers shepherd’s-purse and oat grass with the average coverage in 1m2 being 93 84 21 and 19．5 plants and the densest coverage can reach 1042，1246，352 and 256plants／m2．Therefore several weeding measures should be combined based on certain rotating farming and soil tillage to reach the high efficiency and low cost. |