41.
For the effective control of early blight of potato, which fungicide is most suitable

42.
Blossom end rot of tomato is caused due to deficiency of

43.
In 1845, the late blight of potato destroyed the potato crop of Ireland was caused by

44.
Which of the following is a biofertilizer?

45.
Most common 5 deficient nutrients in soils are N, P, K, S and

46.
Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes?

47.
The stage-I of a rust pathogen consists of

48.
Which of the following bacteria generally used in genetic engineering for transfer of character from one organism to another

49.
Polygonum type of embryo sac/female gametophyte of angiosperms is

50.
Activated sludge contains