Crops ›› 2017, Vol. 33 ›› Issue (4): 161-164.doi: 10.16035/j.issn.1001-7283.2017.04.027

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Pathogenicity and Biological Characteristics of Verticillium wilt of Sunflower in Ningxia

Liu Jixia,Shan Junjian,Ma Yuanchun,Zeng Baoan   

  1. Crop Institute,Ningxia Academy of Agriculture and Forestry Sciences,Yongning 750105,Ningxia,China
  • Received:2017-04-11 Revised:2017-06-14 Online:2017-08-15 Published:2018-08-26

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Abstract:

In order to clarity species of sunflower Verticillium wilt pathogen, the occurring regularity of the disease was analyzed and the key control technology was studied. In the research, species of the pathogens are identified by morphology and biological methods; and the important biological characteristics and pathogenicty of the pathogens were researched by general biologic method. The identified results of pathogen showed that main pathogens causing the sunflower Verticillium wilt areVerticillum dahliae in Ningxia.Research on biological characteristical of pathogen showed that the growth temperature range was from 10℃ to 30℃, the pathogenic hyphae optimum growth temperature was 25℃ in dark; the optimum pH range was 5-6; the optimal carbon and nitrogen sources were starch and glycine; And the lethal temperature was 50℃.

Key words: Sunflower, Verticillium wilt, Pathogenic, Biological characteristics

Fig.1

Effects of different tempeature on the hypha gowth"

Fig.2

Effects of pH on the hypha gowth"

Fig.3

Effects of carbon source on the hypha growth"

Fig.4

Effects of nitrogen source on the hypha growth"

Fig.5

Effects of differenent light on the hypha growth"

Table 1

Test of mycelium death point"

处理时间(d)
Time of
treatment		 5min 10min
30℃ 35℃ 40℃ 45℃ 50℃ 30℃ 35℃ 40℃ 45℃ 50℃
5 + + + ○ ○ + + ○ ○ ○
10 + + + + ○ + + + ○ ○
15 + + + + ○ + + + + ○
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