Effect of temperature on the growth and field incidence of tomato Ralstonia solanacearum

doi:10.16178/j.issn.0528-9017.20250290

Abstract

Abstract:

To explore the effect of temperature on the growth and field incidence of tomato Ralstonia solanacearum, the D₆₀₀ of Ralstonia solanacearum suspension at five temperatures of 20, 25, 30, 35 and 40 ℃ were measured, and the growth curve was drawn. For the first time, by combining the temperature and the incidence rate of Ralstonia solanacearum in the high-altitude tomato facility, the optimal temperature for the growth of tomato Ralstonia solanacearum was determined. A method for controlling Ralstonia solanacearum by using temperature as an indicator factor was proposed, with the aim of reducing the losses caused by Ralstonia solanacearum in tomato production. The results showed that temperature had a obvious impact on the growth of Ralstonia solanacearum. The optimal temperature range for the growth of Ralstonia solanacearum was 30-35 ℃. The incidence pattern of Ralstonia solanacearum in high-altitude tomato fields was consistent with this, when the field temperature was above 25 ℃, the disease began to occur, entering the peak period of onset at 30-35 ℃. The study had clarified the optimal temperature range for the growth and field prevalence of tomato Ralstonia solanacearum, providing a theoretical basis for the prediction and prevention of field Ralstonia solanacearum.

Key words: tomato, Ralstonia solanacearum, temperature, prediction, prevention

CLC Number:

S436.412

ZHOU Qianqian, GAO Anzhong, CHEN Jianfeng, XU Mingfei. Effect of temperature on the growth and field incidence of tomato Ralstonia solanacearum[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(12): 3052-3056.

Figures/Tables 4

Fig.1 Colony morphology of the tomato Ralstonia solanacearum on the TTC medium

Fig.2 Effect of temperature on the growth curve of the tomato Ralstonia solanacearum

Fig.3 Screening of the optimal growth temperature for Ralstonia solanacearum

Fig.4 Temperature changes in high-altitude tomato facility and the incidence rate of tomato Ralstonia solanacearum

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