How to control wilt disease in ginger due to the Ralstonia Bacteria (Pseudomonas) solanacearum which is classified in Race 4?

Ralstonia Bacterial Wilt (Pseudomonas) solanacearum which belongs to Race 4 in ginger.

Picture Symptoms of Ralstonia bacterial wilt disease (Pseudomonas solanacearum)
Picture Symptoms of Ralstonia bacterial wilt disease (Pseudomonas solanacearum)

Host plant for Ralstonia Bacterial Wilt (Pseudomonas) solanacearum:

Curcuma amada, Curcuma zedoaria, ginger, turmeric, Kaempferia galanga, Curcuma zanthorrhiza, bangle, Zingiber zerumbet, tomato, eggplant, patchouli, tobacco, peanuts, green beans, soybeans, tamarind, Catharanthus roseus, kenaf, rosella, blue flower, Cassava, yellow, tomato, chili, potato, long beans, paper flower, sesame, turi, takokak. Several types of weeds include babadotan, Phyllanthus urinaria, Physalis, Commelina sp., Jackfruit, Spigelia anthelmia, Erechtites sp., And purslane.

Attack Symptoms in ginger

  • The first symptoms disease at the age of 3 months are yellowing and curling of the leaves, starting with the older leaves then followed by the younger leaves, then until all the leaves are yellow and die;
  • Symptoms disease of yellowing on the leaves ginger usually start at the edge of the leaf and then spread throughout the leaf blade;
  • At the base of the stem, there is a wet concave symptom and black or gray streaks along the stem;
  • At the stage of development, the stems are easily removed from the rhizome. If you massage the base of the stem or rhizome by hand, it will release white mucus like milk;

Control

Technical culture control

  • Plant healthy seeds;
  • Do not plant ginger in areas affected by this disease for at least 5 years, it is better to plant non-host plants of R. solanacearum, including rice and maize;
  • In endemic areas, rotation with other plants that are not host to this pathogen must be carried out.

Mechanical control

  • Creating good drainage channels so as not to become flooded;
  • Perform regular and intensive sanitation and garden maintenance, namely pulling out sick plants, pulling out weeds properly;
  • The use of husk ash and shallot extract on R. solanacearum contaminated soil can reduce disease attacks by up to 33%;

Biological control

  • The use of compost or antagonistic agents such as Gliocladium sp., Trichoderma sp., Or Pseudomonas fluorescens, Biotriba compost can suppress disease attacks.

Chemical control

  • Control using Dithane M-45 0.25%), Bavistin (0.25%).
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