Black spot, nonpathogenic Iyi ndwara ifata ibirayi bikiri bishyashya ku gishishwa hagaragara utuziga tw’umukara dufite aho turangirira hagaragara. Kubera ko ibi bikomere biboneka kubera ko ibijumba byangijwe, ibimenyetso by’imbere bigaragazwa n’udukomere two ku gishishwa. Iyi ndwara ishobora kugaragara bidatewe n’udukomere tw’inyuma kandi ibyo bikomere by’inyuma ntabwo bigaragara mu bimenyetso by’imbere. Hari impamvu zituma habaho iyo ndwara. Ibijumba bidakomeye bikunda kugira iyi ndwara. Ku mpera y’uruti niho hangirika cyane kurusha utumera ku ruhande. Ibijumba bikuru nibyo biyirwanya cyane kurusha ibitoya. Irinde ibikwa ry’ibijumba ahantu hakonje kandi birundanyije.
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