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A common biocontrol agent for the control of plant diseases is

1. Baculovirus
2. Bacillus thuringiensis
3. Glomus
4. Trichoderma

Correct answer: Trichoderma

Solution

Trichoderma species are widely used as biocontrol agents because they parasitize or inhibit plant-pathogenic fungi and promote plant health. The other options are used for different purposes: Baculovirus and Bacillus thuringiensis target insect pests, while Glomus is a mycorrhizal fungus.

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