数字农科院2.0

Eco-Friendly Management Of Bacterial Wilt In Tomato Using Dried Powder Of The Wild Arid-Land Medicinal Shrub Rhazya Stricta

文献类型： 外文期刊

作者： Khan, RAA; Alam, SS; Hayat, S; Ahmad, M; Ali, A; Naz, I; Li, Y

作者机构：

关键词： Rhazya Stricta; Succulent Shoot Powder; Zone Of Inhibition; In Vivo; In Vitro; Tomato Bacterial Wilt; Ralstonia Solanacearum

期刊名称： PLANT DISEASE

ISSN： 0191-2917

年卷期： 2020 年 104 卷 10 期

页码：

收录情况： JCR（2021版）

摘要： Bacterial wilt (BW) disease caused by Ralstonia solanacearum species complex is a devastating plant disease that inflicts heavy losses to the large number of economic host plants it infects. In this study, the potential of dried powder of the arid-land medicinal shrub Rhazya stricta to control BW of tomato was explored. Both, in vitro and in planta studies were conducted, using different concentrations of dried powder of plant parts, and applied (surface mulched or mixed) to infested soil at 0, 10, and 20 days before transplanting (DBT). Aqueous extract of leaves (16% w/v) was found to be as effective as streptomycin (100 ppm) in inhibiting the in vitro growth of R. solanacearum. As evident from the scanning electron micrograph, 16% aqueous extract of leaves produced severe morphological changes, such as rupture of the bacterial cell walls. Results from the greenhouse experiments demonstrated that the higher powder dose (succulent shoot), namely, 30 g/kg of soil mixed with infested soil 20 DBT, was found to be the most effective in controlling BW. It increased root length (cm), shoot length (cm), and plant fresh biomass (g) by 55, 42, and 40%, respectively, over control plants. Mixing of plant powder with the artificially infested (35 ml of 10(8) CFU/ml per kilogram of soil) pot soil was better than surface mulching. The 30 g/kg of soil dose mixed with soil increased root length (cm), shoot length (cm), and plant fresh biomass (g) of treated plants by 67, 36, and 46%, respectively, over control plants. A 37% decrease in disease severity over the control was observed with drench application of 30 g of powder per kilogram of soil applied once at 20 DBT. Our results indicated that the dried powder (30 g/kg of soil) of leaves or succulent shoots of R. stricta, thoroughly mixed with soil, 20 DBT, could act as an effective control method against BW.

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