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Is biological control an effective way of controlling pests? Over 40% of the world's food production is destroyed by pests, diseases, and weeds each year. Another 20% is lost to pests after harvest. (Paoletti, Maurizio G. and Pimentel D.) Farmers usually use chemicals to control pests. However, pesticides and herbicides are an extremely harmful factor for our environment. They cause pollution in our water, air, and food. They can also kill off many beneficial insects and make infestation worse. Worst of all, it can take years for some of these chemicals to breakdown and decompose. Therefore, the use of biological control is now important. We have our environment to think about. Practicing biological pest control gives us a promising way of reducing the use of chemicals and developing alternatives that are compatible nature. So agricultural scientist tried to control unwanted plants, insects and fungi by biological methods in order to increase...

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