The Careless Use of Chemicals to Control Pests

The Careless Use of Chemicals to Control Pests or Natural Pest Control
Indian Runner Ducks Eat Slugs and Bugs

One of the significant challenges we face is dealing with biological pests. In the United States, the accepted pest control method is using chemicals to kill anything that affects crop growing, spreads diseases, or just annoys us. We use weed and vegetation killers, insect sprays, chemical treatments for trees, and chemicals for the soil to make our lives more comfortable and increase the food supply. Unfortunately, the problems caused by the careless use of chemicals to control pests become more evident as we see the collateral damage and the cost of chemical production and distribution.

The current battle over the potential cancer-causing effect of Roundup reminds us of the health damage Agent Orange caused for military personnel in Vietnam. On a personal note, my younger brother died from the effects of Agent Orange that he was exposed to during his military service. We need to realize that God has given us tools to control negative environmental influences without the careless use of chemicals.

Studies show that the collateral damage from air pollution and ground-level ozone includes increased heart disease, diabetes, obesity, and dementia. Even aggression among animals and humans increases when pollution levels rise. For example, a study of 70,000 U.S. cases showed more people were bitten by dogs on smoggy days. 

American foulbrood is a bacterial disease that has wiped out many broods of honey bees and is apparently catalyzed by pesticides used on crops that bees pollinate. The U.S. Department of Agriculture has approved an oral honeybee vaccine against the disease. But, again, this is an example of collateral damage from the careless use of chemicals to control pests.

Natural pest control avoids collateral damage. For example, vineyard owners near Cape Town, South Africa, use a group of domesticated Indian runner ducks to eat the snails and bugs that infect their vines. In addition to eating the pests, the ducks leave natural fertilizer to nourish the vines.

People use bats to eat insect pests in various places worldwide. Locust swarms are not an issue where bat populations are large. Insecticides can cause the death of songbirds, and as the bird populations decline, insect swarms increase, creating more problems. Even removing fish and frog populations harms pest control, as fish and frogs eat many insects and their larvae. 

God has built pest controls into our planet, but humans often upset the balance. Restoring natural controls is within our reach, but people often believe the careless use of chemicals to control pests is easier and more profitable. Unfortunately, ignoring God’s design leads to health problems linked to the chemicals we dump on our land and into our rivers, lakes, and oceans. 

— John N. Clayton © 2023

References: “What pollution does to you” in the March 25, 2023, issue of Science News, “The list of diseases linked to air pollution is growing” in Science News, September 2017, and Solutions, a publication of the Environmental Defense Fund.

Biological Pest Control and Valencia Oranges

Biological Pest Control and Oranges

There are huge concerns about the use of chemicals in controlling agricultural pests that destroy crops. Nearly every crop you can think of has a worm, fungus, or bug that eats it and can wipe out a significant food source for humans. Since World War II, this problem is usually addressed by using chemicals to kill the offending pest. The problem is the collateral damage of agricultural chemicals, and the solution is biological pest control which actually predates industrial pesticides.

We know now that many of these chemicals cause cancer in human beings. We have also seen the terrible effects of chemicals on wildlife. In past years, the use of DDT on various crops resulted in the death of massive numbers of birds. Fish populations in fresh and seawater have been decimated by runoff from fields sprayed with pesticides. The real tragedy is that the use of chemicals is almost unnecessary. God has provided solutions to the problem of agricultural pests, but humans refuse or neglect to use those solutions.

More than a century ago, the first instance of modern biological pest control was the decimation of citrus groves by a bug named Icerya. The Icerya probably came to America from their native Australia by hitchhiking with careless travelers. In California, some 600,000 orange trees produced Valencia oranges in 1890 until Iceryas invaded and decimated them, reducing orange production by 80%.

Growers tried every method they could think of, including spraying the remaining trees with chemicals, setting off explosions, and burning infected trees. Finally, entomologists went to Australia and discovered a ladybug known as Novius that eats Icerya. When growers released the ladybugs in the California citrus groves, they wiped out the Icerya and rescued the American orange crop.

Citrus growers still depend on Novius ladybugs and pay up to a dollar per ladybug when they have Icerya infestations in their trees. God’s natural biological pest control works with no cancer risk and minimum cost. Unfortunately, human impatience with God’s answers has caused cancer, pollution, and enormous environmental damage.

— John N. Clayton © 2022

Reference: Smithsonian magazine January/February 2022 pages 22 – 25.