A) Bacillus sphaericus
B) Trichoderma viride
C) Bacillus thuringiensis
D) Bacillus subtilis
Correct Answer: D
Solution :
Bacillus subtilis is a Gram-positive bacteria found in soil and the gastrointestinal tract of mminants and humans. It is not used as a biocontrol agent. Bacillus sphaericus is used as a biocontrol agent. Tiichodeima species are free-living fungi that are very; common in the root ecosystems. They are effective biocontrol agents of several plant pathogens. Bacillus thuiingiensis is the bacteria that can be introduced in order to control butterfly caterpillars. There are available in sachets as dried spores which are mixed with water and sprayed onto vulnerable plants such as brassicas and fruit trees.
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