Which of the following methods can be used to meet the food requirements of the growing human population?

Consider the following statements:
$I$. Solid stem in wheat exhibits non-preference by stem sawfly.
$II$. In cotton,smooth leaf and absence of nectar repel bollworms.
$III$. In maize,high aspartic acid,low nitrogen and sugar content protect them from stem borers.
Which of the statements given above are correct?

$A$: Encephalomalacia,a disease of poultry,is caused by the protozoan $Eimeria$.
$R$: Encephalomalacia causes bloody diarrhoea in poultry.

The larva of $Bombyx$ $mori$ is known as

Which three crops contribute the most to global food production?

Which of the following is a viral disease in poultry?