One of the major difficulties in the biological control of insect pests is that:
Correct answer: D. The predator does not always survive when transferred to a new environment
- A. The method is less effective as compared with the use of insecticides
- B. The practical difficulty of introducing the predator to specific areas
- C. The predator develops a preference for other diets and may itself become a pest
- D. The predator does not always survive when transferred to a new environment
Explanation
Insect enemies play an important role in nature for managing the phytophagous insect pests and keeping a balance. It is just possible that predators of a particular plant pest are unable to get established and multiply in a particular environment. In such cases, the predators are reared in the laboratory and let off at a particular time when the pests are about to threaten the crops. And then this practice becomes expensive.
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Biology is divided into fields such as botany, zoology, microbiology, genetics, ecology, physiology and biotechnology, each focusing on a different aspect of life. Levels of biological organization progress from atoms and molecules through organelles, cells, tissues, organs and organ systems to organisms, populations, communities, ecosystems and the biosphere.
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