Abstract
Leaf spot was found on field bindweed (Convolvulus arvensis L.) in Shihezi City, Xinjiang Province, China, during the summer of 2015. Pathogens were isolated from the infected leaves of field bindweed and identified as Aspergillus niger based on morphological and molecular analyses (internal transcribed spacer rDNA and β-tubulin gene). A pathogenicity test confirmed that Aspergillus niger caused the healthy leaves of field bindweed to become diseased. To our knowledge, this is the first report of field bindweed infected naturally by A. niger.
Highlights
Field bindweed is a global malignant perennial weed (Vasilakoglou et al 2013), which competes with many crops, including corn, wheat, beans, cotton, and vegetables, for water, inorganic salt, nutrients, and light (Rodríguez-Navarro et al 2011; Vasilakoglou et al 2013)
The symptoms of diseased leaves of field bindweed from cotton fields were observed as multiple dark brown spots (Fig. 1a), but the leaves of nearby cotton plants didn’t appear to have similar symptoms
The results of the gene sequences were deposited in GenBank
Summary
Field bindweed is a global malignant perennial weed (Vasilakoglou et al 2013), which competes with many crops, including corn, wheat, beans, cotton, and vegetables, for water, inorganic salt, nutrients, and light (Rodríguez-Navarro et al 2011; Vasilakoglou et al 2013). The qualities and yields of the crops declined in areas where field bindweed occurred (Lindenmayer et al 2013). Field bindweed has become one of the most serious weed problems in Xinjiang, majorly affecting the growth of cotton and lacking effective methods to control it currently (Ma et al 2010). Field bindweed has a natural resistance to chemical herbicides; conventional herbicides are generally ineffective for its control (Westwood and Weller 1997). Field bindweed could be naturally infected by Alternaria triticina and Phomopsis
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