Question

Disease crowngall is caused by

• A. Alga
• B. Fungus
• C. Virus
• D. Bacterium

Answer 1

The Correct Option is D

Answer (d) Bacterium

Answer 2

Ans. Bilirubin, a byproduct of the metabolism of hemoglobin, is also removed by the bile. Gallbladder stones from too much bilirubin can injure the health.

• Agrobacterium tumefaciens, also known as Rhizobium radiobacter, is the bacterium that causes the plant disease crown gall. 
• Numerous plant species are at risk. 
• Among them are perennial garden plants, particularly grapes, members of the rose family (Rosaceae), shade and nut trees, several shrubs and vines, and grapes. 
• Roundish rough-surfaced galls with a diameter of several centimeters or more that are typically seen at or close to the soil line, on a graft site or bud union, or on roots and lower stems are among the symptoms. 
• The galls start off being cream- or greenish-colored before becoming brown or black. 
• Plants get weaker as the illness worsens and may possibly perish.
• Crown gall can be prevented by using nursery stock free of suspicious bumps near the crown, former soil line, or graft union; practicing five-year rotation or refraining from replanting for that time; removing severely infected plants (including as many roots as possible); providing protection against injury; controlling weeds; removing large galls on trees; and cutting away infected wounds.