21.
The management of ergot of bajra may be possible by adopting of

22.
Causal organism of potato scab is

23.
Black scurf of potato is caused by

24.
Most effecting wavelength of light for photosynthesis is

25.
Which genus of nematodes has special types of nurse cell systems which serve as source of continuous supply of nutrients to the nematodes

26.
Causal organism that led to the outbreak of Bengal famine is

27.
Phages attach themselves to the host tissue through

28.
Which one forms the endosperm?

29.
When plant showed the partial resistance against all the races of pathogen then it is a type of

30.
Which of the following is present in the core of chlorophyll molecule?