In this study,we tested the effects of the soil pH value,humidity,temperature,soil type on the growth of sunflower Verticillium dahliae Kleb (V.dahliae),our results suggested that the most suitable growth siol conditions for the sunflower V.dahliae is the optimum growth temperature is 25°C ; the pH value is 6.0 ～ 7.0 ; and under 30％ of the soil moisture,the growth speed has positive correlation with the soil moisture; Regarding to the growth speed in different types of soil,the loam is the fastest growth soil type,the clay is the slowest one.Different soil types affected the disease index of the sunflower seedlings after inoculation with V.dahliae,the sunflower seedling which was planted in the clay showed the most severe disease index,the value is 42.5 ; however,seedling in the sand showed the most light disease index,the value is only 18.75.
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万方数据
维普
