Pick out the correct statement
$DDT$ is more toxic than $ BHC$
Aldrin is an organophosphate
$DDT$ is a non-biodegradable pollutant
To mammals $DDT$ is highly toxic
Disadvantages of chemical agents are
$I.$ chemicals are toxic and harmful to human beings and animals
$II.$ chemicals pollute the environment and plants
$III.$ weedicides used to remove weeds also pollute the soil
Choose the correct option
The first natural insecticides discovered by chinese was
Brown Plant Hopper is
The nutritive medium for growing bacteria and many fungi in the laboratory is called
Juvenile hormone causes