Q. Chick Pea is being grown in area where bacterial blight is common. What measures (a – d) should be taken :
(a) Spraying Bordeaux mixture
(b) Controlling insect or vector of pathogen
(c) Use disease free seeds
(d) Use seeds of disease resistant variety.
(i) c, d (ii) a, c (iii) b, c (iv) a, b
Solution : Correct option : A Bacterial blight is a serious disease of field peas that is caused by the pathogens Pseudomonas syringae pv. pisi and Pseudomonas syringae pv. syringae. It can be controlled by crop rotation, time of sowing, farm hygiene, sowing disease free seed and using resistant varieties .The disease is characterized by small, pale green spots or streaks which soon appear water-soaked. The lesions expand and then appear as dry dead spots. In severe infections, a milky gray exudate may be squeezed from the cut end of leaf exhibiting symptoms.
It can be prevented by use of only disease-free seeds and use of varieties resistant to the disease.
