1. Tardigrade
  2. Question
  3. Biology
  4. Spray of Bt sprores protects certain fruit trees against *Note: The word "sprores" in the question has been corrected here below. Spray of Bt spores protects certain fruit trees against

Q. Spray of Bt sprores protects certain fruit trees against
*Note: The word "sprores" in the question has been corrected here below.
Spray of Bt spores protects certain fruit trees against

 174  175 NTA AbhyasNTA Abhyas 2020 Report Error

Solution:

Bacillus thuringiensis (Bt) is a microbial biocontrol agent that can be introduced to control butterfly caterpillars. These are available in sachets as dried spores which are mixed with water and sprayed onto vulnerable plants such as Brassica species and fruit trees, where these are eaten by insect larvae. In the gut of the larvae, the toxin is released and the larvae get killed. The bacterial disease kills the caterpillars, but leave other insects unharmed.
Structural traits of various plants protect most arthropods, thereby preventing the effect of biocontrol measures.
Plant-derived substances are used against beetles to control the damage caused by them.
Trichoderma is a biological control being developed for use in the treatment of plant diseases. They are free-living fungi that are very common in the root ecosystems and are effective against several plants pathogens.