Management of Ralstonia solanacearum (Smith) Wilt in Tomato Using Green Manure of the Medicinal Plant Adhatoda vasica (L.) Nees

• Published in: Gesunde Pflanzen Vol. 72; no. 2; pp. 129 - 138
• Main Authors: Khan, Raja Asad Ali, Ullah, Najeeb, Alam, Syed Sartaj, Ali, Asad, Naz, Ishrat, Ahmad, Bilal, Ahmad, Musharaf, Ullah, Inam
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-06-2020; Springer Nature B.V
• Subjects: Agriculture; Biomedical and Life Sciences; Herbal medicine; Leaves; Life Sciences; Manures; Medicinal plants; Original Article; Parameters; Pathogens; Plant growth; Plant Pathology; Seedlings; Soils; Streptomycin; Tomatoes; Transplantation; Wilt; Integrated disease management; Green manure; Bakterienwelke; Gründüngung; Bacterial wilt; Integriertes Krankheitsmanagement
• ISSN: 0367-4223; 1439-0345
• DOI: 10.1007/s10343-019-00492-4

Aqueous extracts and green manures of different parts of
Adhatoda vasica
, a wild medicinal shrub plant, were tested
in vitro
and
in vivo
for the control of bacterial wilt (BW) in tomato. Higher concentration (14%, w/v) of aqueous extracts of leaf, succlent shoot and stem were more effective than the lower concentrations and inhibited the
in vitro
growth of the pathogen by 94, 89, and 65% respectively, of the growth inhibition produced by streptomycin (200 ppm). Green manure dose of 30 g kg
−1
soil strongly suppressed the BW pathogen, reduced disease severity and promoted the yield-contributing plant growth parameters. Green manure of leaves, when applied to soil 4 weeks before the transplantation of tomato seedlings, controlled BW more effectively and significantly increased plant growth parameters as compared to the green manures of other parts of the plant and other application times. It can be clearly concluded from our data that
Adhatoda vasica
leaves green manure dose of 30 g kg
−1
soil (or possibly higher) could be included as an effective and nature-friendly component of the integrated disease management (IDM) against BW and possibly other similar diseases.