Bacterial Wilt Of Ginger Research Articles

PENGARUH PERLAKUAN BIBIT TERHADAP PERKEMBANGAN PENYAKIT LAYU BAKTERI PADA JAHE (ZINGIBER OFFICINALE)

Effect of seedling treatments on development of bacterial wilt disease of ginger (Zingiber officinale). This experiment was aimed to study the effect of seedling treatment with bactericide on incubation period and disease intensity of bacterial wilt caused by Ralstonia solanacearum on ginger (Zingiber officinale). The experiment was conducted from May to November 2001, and the treatments were set as factorial experiment in completely randomised design. The first factor was the level of bactericide concentrations and the second factor was the length of soaking periods. Each treatment consisted of five plants and was replicated three times. Data were analysed with ANOVA and the means were compared with Duncan test. The results of analysis of variance showed that the interaction of bactericide concentrations with soaking periods was not significantly affected the incubation period and the intensity of bacterial wilt disease of ginger. However, those two factors significantly (P < 0.01) affected the incubation period and the intensity of ginger bacterial wilt disease. Separation of the means by Duncan test indicated that the higher the bactericide concentration, the longer the incubation period. On the other hand, the disease intensity was lowered by the higher concentration. The effect of bactericide concentration 4 g/l was not significantly different from that of 6 g/l. The analysis of variance was also showed that the length of soaking period of ginger seedling in bactericide did not affect the incubation period nor the disease intensity.

Leveraging early dry season planting of ginger under irrigation to enhance production from bacterial wilt infected seed rhizome

Ginger (Zingiber officinale Rosc.), one of the important export crops grown in Ethiopia for its underground aromatic rhizome, is threatened by the destructive Ginger Bacterial Wilt (GBW) disease. The objective of this study was to evaluate the effect of moisture sources, plant spacing, and nitrogen fertiliser, on rhizome yield and yield attributes of latently infected ginger seed rhizomes. Treatments included two levels of moisture sources (irrigation and rainfall), two levels of plant spacing (40 cm x 15 cm and 40 cm x 30 cm), and three rates of nitrogen fertiliser, i.e., 0, 46 and 92 kg N ha 1 applied in the form of urea. Analysis of variance showed significant (P<0.01) variations between moisture sources and planting space for fresh rhizome yield, but not for N levels. Moisture sources also significantly (P<0.01) affected stand count at harvest, and other yield attributes, viz., number of buds per rhizome per hill, number of rhizomes per plant, rhizome size and rhizome and propagule weight. Planting infected ginger rhizomes early in dry season, with irrigation, led to production of healthy and large rhizomes weighing up to 662 g. Narrow plant spacing showed better yield performance and yield attributes, as opposed to wide spacing; though wide plant spacing was more preferred for management of Ginger Bacterial Wilt during humid and warm weather conditions. This experiment clearly demonstrated that planting ginger rhizomes, which are latently infected with Ralistonia solanacearum early in dry season, using irrigation could be the best option to propagate disease free rhizomes since dry condition successfully restrains bacterial development, disintegrating the pathosystem. i.e., avoiding high humidity, which is one of the ideal conditions for bacterial growth. Early planting in dry season, using irrigation is a cost effective and easily applicable practice to control Ginger Bacterial Wilt disease.