Sunday, July 11, 2010

Harmful Insects

Insects attack and injure almost all types of plants. Every year, insects destroy about 10% of the crops raised in the United States. The major pests include boll weevils, which damage cotton; Hessian flies, which attack wheat; corn earworms and chinch bugs, which destroy corn and other crops; and the Colorado beetles, which feed on potatoes.

Many insects are household pests. Clothes moths and carpet beetles ruin clothing, carpets, upholstery, and furs. Silverfish damage books. Termites attack furniture and the beams and floors of buildings. Ants, cockroaches, flies, and many other insects eat or spoil the food stored in homes and warehouses.

The worst insect enemies are probably those that endanger our health. Variuos biting flies and bugs inject a painful and sometimes deadly poison. Many fleas, lice, and other parasites may cause soreness, damage to tissues, or occasionally death. Houseflies and blowflies often carry germs that cause typhoid fever, cholera, dysentry, or other diseases as malaria, African sleeping sickness, or bubonic plague.

Other Interesting Facts

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