Which one of the following proved effective for biological control of nematodal diseases in plants ?
Gliocladium virens
Paecilomyces lilacinus
Pisolithus tinctorius
Pseudomonas cepacia
Which of the following is not used as a biopesticide?
Corpora allata is removed from a nymph. It will
Which one of the following pairs is wrongly matched ?
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
What is the composition of the biogas?