The phenomenon of using a predator for controlling a pest is known as:
- ABiological control
- BGenetic engineering
- CArtificial control
- DConfusion technique
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The first natural insecticide discovered by the Chinese was:
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Column-$I$ Column-$II$ Column-$III$ $(a)$ $B.T.$ bacteria $(p)$ Free-living fungi $(i)$ Arthropods $(b)$ Trichoderma $(q)$ Bionematicides $(ii)$ Cereal crops $(c)$ Baculovirus $(r)$ Cotton $(iii)$ Crop-sucking pests $(d)$ Pseudomonas $(s)$ Symbiotic fungi $(iv)$ Nematodes $(t)$ Quantum-$4000$ $(v)$ Crop disease control $(u)$ Biological control
| Column-$I$ | Column-$II$ | Column-$III$ |
| $(a)$ $B.T.$ bacteria | $(p)$ Free-living fungi | $(i)$ Arthropods |
| $(b)$ Trichoderma | $(q)$ Bionematicides | $(ii)$ Cereal crops |
| $(c)$ Baculovirus | $(r)$ Cotton | $(iii)$ Crop-sucking pests |
| $(d)$ Pseudomonas | $(s)$ Symbiotic fungi | $(iv)$ Nematodes |
| $(t)$ Quantum-$4000$ | $(v)$ Crop disease control | |
| $(u)$ Biological control |
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