Answer:
Unavailability of biological agent.
Explanation:
The main cause of this problem is the unavailability of biological agent for that insects in that environment. biological agents are the organisms that controls other insects population by feeding on them. When a new insect is introduced in a particular environment and no bioagent is present for it, it greatly damaged the crops and destroys the field of the farmer.
The Advantages of Selective Breeding For Humans
1. Higher Yield of Goods
The main reason for selective breeding in the first place is to increase the amount of milk, meat, eggs, or fruits that are produced by the animal or plant. This has been successfully done many times and continues to be done today.
2. Most Nutrition Provided
Plants and animals can be bred to have more nutritional value. This is a great benefit because that nutrition is passed on to the consumers.
3. Breeds Out Harmful Traits
Any traits that are harmful to the species as a whole, or are unnecessary obstacles in the harvesting process can be successfully bred out of the animals.
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The cell contains large numbers of ribosems that are used for protein synthesis. At the periphery of the cell is the plasma membrane. Eukaryotic cells contain a membrane bound
Nuclues and numerous membrane enclosed organelles mitochondria lysosomes Golgi apparatus not found in prokaryotes.
The US, Liberia, Myanmar (Burma)